./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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-array-int-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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:12:14,712 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:12:14,764 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:12:14,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:12:14,767 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:12:14,787 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:12:14,787 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:12:14,788 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:12:14,788 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:12:14,789 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:12:14,789 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:12:14,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:12:14,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:12:14,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:12:14,790 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:12:14,791 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:12:14,791 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:12:14,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:12:14,791 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:12:14,792 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:12:14,792 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:12:14,792 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:12:14,793 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:12:14,793 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:12:14,793 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:12:14,793 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:12:14,794 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:12:14,794 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:12:14,794 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:12:14,794 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:12:14,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:12:14,795 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:12:14,795 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:12:14,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:12:14,795 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:12:14,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:12:14,796 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:12:14,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:12:14,796 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:12:14,797 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:12:14,797 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:12:14,797 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:12:14,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2024-11-10 18:12:15,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:12:15,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:12:15,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:12:15,027 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:12:15,028 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:12:15,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2024-11-10 18:12:16,336 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:12:16,504 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:12:16,505 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2024-11-10 18:12:16,514 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26ba10705/e7879de467b84dcd930f25d5f3e6ad0c/FLAG3cc430cc5 [2024-11-10 18:12:16,527 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26ba10705/e7879de467b84dcd930f25d5f3e6ad0c [2024-11-10 18:12:16,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:12:16,533 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:12:16,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:12:16,534 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:12:16,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:12:16,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd9a48b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16, skipping insertion in model container [2024-11-10 18:12:16,545 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,562 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:12:16,721 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:12:16,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:12:16,741 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:12:16,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:12:16,786 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:12:16,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16 WrapperNode [2024-11-10 18:12:16,787 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:12:16,788 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:12:16,788 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:12:16,788 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:12:16,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,803 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,828 INFO L138 Inliner]: procedures = 25, calls = 36, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 270 [2024-11-10 18:12:16,828 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:12:16,829 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:12:16,829 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:12:16,829 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:12:16,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,839 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,851 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 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]. [2024-11-10 18:12:16,851 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,852 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,857 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,858 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,859 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,860 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:12:16,863 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:12:16,863 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:12:16,863 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:12:16,864 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (1/1) ... [2024-11-10 18:12:16,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:12:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:12:16,891 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) [2024-11-10 18:12:16,895 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 [2024-11-10 18:12:16,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:12:16,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:12:16,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:12:16,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:12:16,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:12:16,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:12:16,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:12:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:12:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:12:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:12:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:12:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:12:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:12:16,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:12:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:12:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:12:16,927 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:12:17,013 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:12:17,015 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:12:17,456 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:12:17,456 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:12:17,820 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:12:17,821 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:12:17,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:12:17 BoogieIcfgContainer [2024-11-10 18:12:17,821 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:12:17,823 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:12:17,823 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:12:17,830 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:12:17,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:12:16" (1/3) ... [2024-11-10 18:12:17,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f02625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:12:17, skipping insertion in model container [2024-11-10 18:12:17,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:12:16" (2/3) ... [2024-11-10 18:12:17,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f02625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:12:17, skipping insertion in model container [2024-11-10 18:12:17,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:12:17" (3/3) ... [2024-11-10 18:12:17,836 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2024-11-10 18:12:17,861 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:12:17,865 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-10 18:12:17,865 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:12:17,948 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:12:17,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 102 transitions, 225 flow [2024-11-10 18:12:17,994 INFO L124 PetriNetUnfolderBase]: 15/99 cut-off events. [2024-11-10 18:12:17,995 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:12:17,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 99 events. 15/99 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 285 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 73. Up to 3 conditions per place. [2024-11-10 18:12:17,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 102 transitions, 225 flow [2024-11-10 18:12:18,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 98 transitions, 214 flow [2024-11-10 18:12:18,006 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:12:18,010 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;@60cd86aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:12:18,011 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-10 18:12:18,013 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:12:18,013 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:12:18,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:12:18,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:18,014 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:12:18,014 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:18,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:18,017 INFO L85 PathProgramCache]: Analyzing trace with hash 24753314, now seen corresponding path program 1 times [2024-11-10 18:12:18,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:18,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142067761] [2024-11-10 18:12:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:18,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:18,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:18,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142067761] [2024-11-10 18:12:18,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142067761] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:18,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:18,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:12:18,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685312791] [2024-11-10 18:12:18,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:18,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:12:18,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:12:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:12:18,277 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-10 18:12:18,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:18,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:18,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-10 18:12:18,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:18,565 INFO L124 PetriNetUnfolderBase]: 866/1719 cut-off events. [2024-11-10 18:12:18,565 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-11-10 18:12:18,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2988 conditions, 1719 events. 866/1719 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11047 event pairs, 514 based on Foata normal form. 170/1341 useless extension candidates. Maximal degree in co-relation 2734. Up to 1169 conditions per place. [2024-11-10 18:12:18,579 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 33 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-10 18:12:18,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 87 transitions, 262 flow [2024-11-10 18:12:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:12:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:12:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2024-11-10 18:12:18,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.696078431372549 [2024-11-10 18:12:18,594 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 214 flow. Second operand 3 states and 213 transitions. [2024-11-10 18:12:18,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 87 transitions, 262 flow [2024-11-10 18:12:18,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 87 transitions, 250 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:12:18,604 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 184 flow [2024-11-10 18:12:18,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-11-10 18:12:18,608 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2024-11-10 18:12:18,608 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 184 flow [2024-11-10 18:12:18,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:18,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:18,608 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:12:18,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:12:18,609 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:18,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:18,611 INFO L85 PathProgramCache]: Analyzing trace with hash 24753315, now seen corresponding path program 1 times [2024-11-10 18:12:18,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:18,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077667457] [2024-11-10 18:12:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:18,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:18,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:18,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077667457] [2024-11-10 18:12:18,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077667457] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:18,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:18,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:12:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952566802] [2024-11-10 18:12:18,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:18,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:12:18,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:12:18,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:12:18,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-10 18:12:18,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:18,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:18,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-10 18:12:18,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:19,135 INFO L124 PetriNetUnfolderBase]: 867/1724 cut-off events. [2024-11-10 18:12:19,136 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-10 18:12:19,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2942 conditions, 1724 events. 867/1724 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11068 event pairs, 514 based on Foata normal form. 0/1173 useless extension candidates. Maximal degree in co-relation 2897. Up to 1182 conditions per place. [2024-11-10 18:12:19,145 INFO L140 encePairwiseOnDemand]: 97/102 looper letters, 37 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2024-11-10 18:12:19,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 90 transitions, 272 flow [2024-11-10 18:12:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:12:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:12:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2024-11-10 18:12:19,148 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6519607843137255 [2024-11-10 18:12:19,149 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 184 flow. Second operand 4 states and 266 transitions. [2024-11-10 18:12:19,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 90 transitions, 272 flow [2024-11-10 18:12:19,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:12:19,152 INFO L231 Difference]: Finished difference. Result has 87 places, 90 transitions, 207 flow [2024-11-10 18:12:19,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=87, PETRI_TRANSITIONS=90} [2024-11-10 18:12:19,153 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -6 predicate places. [2024-11-10 18:12:19,153 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 90 transitions, 207 flow [2024-11-10 18:12:19,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:19,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:19,154 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:12:19,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:12:19,154 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:19,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1307596187, now seen corresponding path program 1 times [2024-11-10 18:12:19,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:19,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721867351] [2024-11-10 18:12:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:19,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:19,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:19,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721867351] [2024-11-10 18:12:19,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721867351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:12:19,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734290810] [2024-11-10 18:12:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:19,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:19,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:12:19,442 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) [2024-11-10 18:12:19,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:12:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:19,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:12:19,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:12:19,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-10 18:12:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:19,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:12:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:19,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734290810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:12:19,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:12:19,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:12:19,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441393182] [2024-11-10 18:12:19,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:12:19,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:12:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:19,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:12:19,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:12:20,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-10 18:12:20,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 207 flow. Second operand has 11 states, 11 states have (on average 54.36363636363637) internal successors, (598), 11 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:20,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:20,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-10 18:12:20,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:20,995 INFO L124 PetriNetUnfolderBase]: 868/1728 cut-off events. [2024-11-10 18:12:20,995 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-10 18:12:20,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 1728 events. 868/1728 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11073 event pairs, 514 based on Foata normal form. 0/1176 useless extension candidates. Maximal degree in co-relation 2929. Up to 1177 conditions per place. [2024-11-10 18:12:21,006 INFO L140 encePairwiseOnDemand]: 91/102 looper letters, 32 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-11-10 18:12:21,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 94 transitions, 315 flow [2024-11-10 18:12:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:12:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:12:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 580 transitions. [2024-11-10 18:12:21,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-11-10 18:12:21,009 INFO L175 Difference]: Start difference. First operand has 87 places, 90 transitions, 207 flow. Second operand 10 states and 580 transitions. [2024-11-10 18:12:21,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 94 transitions, 315 flow [2024-11-10 18:12:21,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:12:21,011 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 244 flow [2024-11-10 18:12:21,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=244, PETRI_PLACES=94, PETRI_TRANSITIONS=92} [2024-11-10 18:12:21,011 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2024-11-10 18:12:21,011 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 244 flow [2024-11-10 18:12:21,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.36363636363637) internal successors, (598), 11 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:21,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:21,012 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:21,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:12:21,216 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 [2024-11-10 18:12:21,217 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:21,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:21,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1308097091, now seen corresponding path program 1 times [2024-11-10 18:12:21,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:21,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696765285] [2024-11-10 18:12:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:21,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:21,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:21,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696765285] [2024-11-10 18:12:21,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696765285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:21,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:21,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:12:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427919592] [2024-11-10 18:12:21,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:21,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:12:21,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:12:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:12:21,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-10 18:12:21,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 92 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:21,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:21,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-10 18:12:21,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:21,794 INFO L124 PetriNetUnfolderBase]: 869/1733 cut-off events. [2024-11-10 18:12:21,794 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-10 18:12:21,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2985 conditions, 1733 events. 869/1733 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11106 event pairs, 514 based on Foata normal form. 1/1186 useless extension candidates. Maximal degree in co-relation 2943. Up to 1182 conditions per place. [2024-11-10 18:12:21,805 INFO L140 encePairwiseOnDemand]: 94/102 looper letters, 38 selfloop transitions, 8 changer transitions 0/95 dead transitions. [2024-11-10 18:12:21,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 344 flow [2024-11-10 18:12:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:12:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:12:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 324 transitions. [2024-11-10 18:12:21,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6352941176470588 [2024-11-10 18:12:21,807 INFO L175 Difference]: Start difference. First operand has 94 places, 92 transitions, 244 flow. Second operand 5 states and 324 transitions. [2024-11-10 18:12:21,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 344 flow [2024-11-10 18:12:21,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 300 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-10 18:12:21,812 INFO L231 Difference]: Finished difference. Result has 93 places, 95 transitions, 242 flow [2024-11-10 18:12:21,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=93, PETRI_TRANSITIONS=95} [2024-11-10 18:12:21,813 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 0 predicate places. [2024-11-10 18:12:21,813 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 95 transitions, 242 flow [2024-11-10 18:12:21,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:21,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:21,814 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:21,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:12:21,814 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:21,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1281384270, now seen corresponding path program 1 times [2024-11-10 18:12:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:21,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501948997] [2024-11-10 18:12:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:21,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:21,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:21,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501948997] [2024-11-10 18:12:21,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501948997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:12:21,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974846668] [2024-11-10 18:12:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:21,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:21,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:12:21,992 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) [2024-11-10 18:12:22,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:12:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:22,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:12:22,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:12:22,082 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 [2024-11-10 18:12:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:22,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:12:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:22,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974846668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:12:22,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:12:22,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:12:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228144827] [2024-11-10 18:12:22,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:12:22,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:12:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:12:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:12:22,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-10 18:12:22,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 95 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 54.46153846153846) internal successors, (708), 13 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:22,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:22,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-10 18:12:22,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:23,229 INFO L124 PetriNetUnfolderBase]: 870/1737 cut-off events. [2024-11-10 18:12:23,230 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-10 18:12:23,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 1737 events. 870/1737 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11090 event pairs, 514 based on Foata normal form. 0/1187 useless extension candidates. Maximal degree in co-relation 2925. Up to 1174 conditions per place. [2024-11-10 18:12:23,240 INFO L140 encePairwiseOnDemand]: 92/102 looper letters, 35 selfloop transitions, 20 changer transitions 0/101 dead transitions. [2024-11-10 18:12:23,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 101 transitions, 367 flow [2024-11-10 18:12:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:12:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:12:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 587 transitions. [2024-11-10 18:12:23,242 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5754901960784313 [2024-11-10 18:12:23,242 INFO L175 Difference]: Start difference. First operand has 93 places, 95 transitions, 242 flow. Second operand 10 states and 587 transitions. [2024-11-10 18:12:23,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 101 transitions, 367 flow [2024-11-10 18:12:23,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 361 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:12:23,244 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 283 flow [2024-11-10 18:12:23,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=283, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2024-11-10 18:12:23,245 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 6 predicate places. [2024-11-10 18:12:23,245 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 283 flow [2024-11-10 18:12:23,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.46153846153846) internal successors, (708), 13 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:23,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:23,245 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:23,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:12:23,449 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 [2024-11-10 18:12:23,450 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:23,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:23,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1281132869, now seen corresponding path program 1 times [2024-11-10 18:12:23,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:23,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978644477] [2024-11-10 18:12:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:23,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:23,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:23,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978644477] [2024-11-10 18:12:23,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978644477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:23,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:23,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:12:23,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511076227] [2024-11-10 18:12:23,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:23,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:12:23,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:12:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:12:23,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-10 18:12:23,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:23,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:23,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-10 18:12:23,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:23,956 INFO L124 PetriNetUnfolderBase]: 871/1742 cut-off events. [2024-11-10 18:12:23,956 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-10 18:12:23,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3013 conditions, 1742 events. 871/1742 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11137 event pairs, 514 based on Foata normal form. 0/1193 useless extension candidates. Maximal degree in co-relation 2935. Up to 1187 conditions per place. [2024-11-10 18:12:23,967 INFO L140 encePairwiseOnDemand]: 93/102 looper letters, 41 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2024-11-10 18:12:23,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 393 flow [2024-11-10 18:12:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:12:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:12:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 323 transitions. [2024-11-10 18:12:23,969 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-10 18:12:23,969 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 283 flow. Second operand 5 states and 323 transitions. [2024-11-10 18:12:23,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 393 flow [2024-11-10 18:12:23,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 100 transitions, 351 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-10 18:12:23,971 INFO L231 Difference]: Finished difference. Result has 98 places, 100 transitions, 289 flow [2024-11-10 18:12:23,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2024-11-10 18:12:23,972 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 5 predicate places. [2024-11-10 18:12:23,972 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 289 flow [2024-11-10 18:12:23,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:23,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:23,973 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:23,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:12:23,973 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:23,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:23,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1149147738, now seen corresponding path program 1 times [2024-11-10 18:12:23,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:23,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039027963] [2024-11-10 18:12:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:23,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:24,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:24,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039027963] [2024-11-10 18:12:24,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039027963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:12:24,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650832349] [2024-11-10 18:12:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:24,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:24,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:12:24,136 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) [2024-11-10 18:12:24,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:12:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:24,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:12:24,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:12:24,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-10 18:12:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:24,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:12:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:24,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650832349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:12:24,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:12:24,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:12:24,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417439594] [2024-11-10 18:12:24,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:12:24,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:12:24,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:12:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:12:25,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-10 18:12:25,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 289 flow. Second operand has 13 states, 13 states have (on average 54.76923076923077) internal successors, (712), 13 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:25,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:25,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-10 18:12:25,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:25,411 INFO L124 PetriNetUnfolderBase]: 872/1746 cut-off events. [2024-11-10 18:12:25,411 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-10 18:12:25,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3026 conditions, 1746 events. 872/1746 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11163 event pairs, 514 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 2952. Up to 1179 conditions per place. [2024-11-10 18:12:25,420 INFO L140 encePairwiseOnDemand]: 92/102 looper letters, 37 selfloop transitions, 23 changer transitions 0/106 dead transitions. [2024-11-10 18:12:25,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 106 transitions, 424 flow [2024-11-10 18:12:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:12:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:12:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 586 transitions. [2024-11-10 18:12:25,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5745098039215686 [2024-11-10 18:12:25,422 INFO L175 Difference]: Start difference. First operand has 98 places, 100 transitions, 289 flow. Second operand 10 states and 586 transitions. [2024-11-10 18:12:25,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 106 transitions, 424 flow [2024-11-10 18:12:25,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 106 transitions, 416 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:12:25,424 INFO L231 Difference]: Finished difference. Result has 103 places, 102 transitions, 334 flow [2024-11-10 18:12:25,424 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=334, PETRI_PLACES=103, PETRI_TRANSITIONS=102} [2024-11-10 18:12:25,429 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 10 predicate places. [2024-11-10 18:12:25,429 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 102 transitions, 334 flow [2024-11-10 18:12:25,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.76923076923077) internal successors, (712), 13 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:25,429 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:25,429 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:25,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:12:25,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:25,630 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:25,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash -896260589, now seen corresponding path program 1 times [2024-11-10 18:12:25,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:25,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512116682] [2024-11-10 18:12:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:25,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:25,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:25,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512116682] [2024-11-10 18:12:25,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512116682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:25,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:25,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:12:25,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571198862] [2024-11-10 18:12:25,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:25,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:12:25,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:12:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:12:25,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-10 18:12:25,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 102 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:25,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:25,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-10 18:12:25,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:25,985 INFO L124 PetriNetUnfolderBase]: 1510/3075 cut-off events. [2024-11-10 18:12:25,985 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-10 18:12:25,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 3075 events. 1510/3075 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 22050 event pairs, 785 based on Foata normal form. 62/2268 useless extension candidates. Maximal degree in co-relation 3504. Up to 1399 conditions per place. [2024-11-10 18:12:26,002 INFO L140 encePairwiseOnDemand]: 93/102 looper letters, 108 selfloop transitions, 9 changer transitions 0/162 dead transitions. [2024-11-10 18:12:26,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 162 transitions, 765 flow [2024-11-10 18:12:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:12:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:12:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2024-11-10 18:12:26,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6977124183006536 [2024-11-10 18:12:26,004 INFO L175 Difference]: Start difference. First operand has 103 places, 102 transitions, 334 flow. Second operand 6 states and 427 transitions. [2024-11-10 18:12:26,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 162 transitions, 765 flow [2024-11-10 18:12:26,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 162 transitions, 681 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-11-10 18:12:26,007 INFO L231 Difference]: Finished difference. Result has 105 places, 109 transitions, 359 flow [2024-11-10 18:12:26,007 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=105, PETRI_TRANSITIONS=109} [2024-11-10 18:12:26,007 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 12 predicate places. [2024-11-10 18:12:26,008 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 109 transitions, 359 flow [2024-11-10 18:12:26,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:26,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:26,008 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:26,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:12:26,008 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:26,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:26,009 INFO L85 PathProgramCache]: Analyzing trace with hash -449113941, now seen corresponding path program 1 times [2024-11-10 18:12:26,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:26,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011463340] [2024-11-10 18:12:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:26,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:26,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:26,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011463340] [2024-11-10 18:12:26,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011463340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:26,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:26,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:12:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854616957] [2024-11-10 18:12:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:26,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:12:26,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:12:26,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:12:26,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-10 18:12:26,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 109 transitions, 359 flow. Second operand has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:26,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:26,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-10 18:12:26,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:26,332 INFO L124 PetriNetUnfolderBase]: 1264/2617 cut-off events. [2024-11-10 18:12:26,333 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2024-11-10 18:12:26,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2617 events. 1264/2617 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18378 event pairs, 665 based on Foata normal form. 41/1973 useless extension candidates. Maximal degree in co-relation 3605. Up to 1413 conditions per place. [2024-11-10 18:12:26,345 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 103 selfloop transitions, 5 changer transitions 0/153 dead transitions. [2024-11-10 18:12:26,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 153 transitions, 699 flow [2024-11-10 18:12:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:12:26,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:12:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 412 transitions. [2024-11-10 18:12:26,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.673202614379085 [2024-11-10 18:12:26,346 INFO L175 Difference]: Start difference. First operand has 105 places, 109 transitions, 359 flow. Second operand 6 states and 412 transitions. [2024-11-10 18:12:26,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 153 transitions, 699 flow [2024-11-10 18:12:26,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 153 transitions, 697 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:12:26,349 INFO L231 Difference]: Finished difference. Result has 111 places, 110 transitions, 376 flow [2024-11-10 18:12:26,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=111, PETRI_TRANSITIONS=110} [2024-11-10 18:12:26,350 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 18 predicate places. [2024-11-10 18:12:26,351 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 110 transitions, 376 flow [2024-11-10 18:12:26,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:26,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:26,351 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:26,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:12:26,352 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:26,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 851600145, now seen corresponding path program 1 times [2024-11-10 18:12:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467874486] [2024-11-10 18:12:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:26,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:26,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467874486] [2024-11-10 18:12:26,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467874486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:26,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:26,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:12:26,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695743920] [2024-11-10 18:12:26,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:26,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:12:26,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:12:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:12:26,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-10 18:12:26,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 110 transitions, 376 flow. Second operand has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:26,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:26,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-10 18:12:26,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:26,823 INFO L124 PetriNetUnfolderBase]: 1907/4373 cut-off events. [2024-11-10 18:12:26,823 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2024-11-10 18:12:26,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7907 conditions, 4373 events. 1907/4373 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 36252 event pairs, 844 based on Foata normal form. 62/3260 useless extension candidates. Maximal degree in co-relation 5649. Up to 1686 conditions per place. [2024-11-10 18:12:26,845 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 107 selfloop transitions, 12 changer transitions 0/164 dead transitions. [2024-11-10 18:12:26,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 164 transitions, 778 flow [2024-11-10 18:12:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:12:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:12:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 419 transitions. [2024-11-10 18:12:26,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.684640522875817 [2024-11-10 18:12:26,846 INFO L175 Difference]: Start difference. First operand has 111 places, 110 transitions, 376 flow. Second operand 6 states and 419 transitions. [2024-11-10 18:12:26,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 164 transitions, 778 flow [2024-11-10 18:12:26,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 164 transitions, 773 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:12:26,851 INFO L231 Difference]: Finished difference. Result has 118 places, 117 transitions, 468 flow [2024-11-10 18:12:26,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=118, PETRI_TRANSITIONS=117} [2024-11-10 18:12:26,853 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 25 predicate places. [2024-11-10 18:12:26,853 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 117 transitions, 468 flow [2024-11-10 18:12:26,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:26,853 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:26,853 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:26,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:12:26,854 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:26,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash -315489936, now seen corresponding path program 1 times [2024-11-10 18:12:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:26,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193633082] [2024-11-10 18:12:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:26,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:26,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:26,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193633082] [2024-11-10 18:12:26,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193633082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:26,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:26,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:12:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728570706] [2024-11-10 18:12:26,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:26,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:12:26,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:12:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:12:26,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-10 18:12:26,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 117 transitions, 468 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:26,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:26,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-10 18:12:26,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:27,272 INFO L124 PetriNetUnfolderBase]: 1602/3774 cut-off events. [2024-11-10 18:12:27,272 INFO L125 PetriNetUnfolderBase]: For 1359/1359 co-relation queries the response was YES. [2024-11-10 18:12:27,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7092 conditions, 3774 events. 1602/3774 cut-off events. For 1359/1359 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 30805 event pairs, 896 based on Foata normal form. 58/2869 useless extension candidates. Maximal degree in co-relation 4993. Up to 1741 conditions per place. [2024-11-10 18:12:27,290 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 101 selfloop transitions, 11 changer transitions 0/157 dead transitions. [2024-11-10 18:12:27,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 157 transitions, 818 flow [2024-11-10 18:12:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:12:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:12:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 411 transitions. [2024-11-10 18:12:27,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6715686274509803 [2024-11-10 18:12:27,292 INFO L175 Difference]: Start difference. First operand has 118 places, 117 transitions, 468 flow. Second operand 6 states and 411 transitions. [2024-11-10 18:12:27,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 157 transitions, 818 flow [2024-11-10 18:12:27,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 157 transitions, 813 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:12:27,295 INFO L231 Difference]: Finished difference. Result has 124 places, 118 transitions, 497 flow [2024-11-10 18:12:27,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=497, PETRI_PLACES=124, PETRI_TRANSITIONS=118} [2024-11-10 18:12:27,296 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 31 predicate places. [2024-11-10 18:12:27,296 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 118 transitions, 497 flow [2024-11-10 18:12:27,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:27,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:27,297 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:27,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:12:27,297 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:27,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:27,297 INFO L85 PathProgramCache]: Analyzing trace with hash -87161303, now seen corresponding path program 1 times [2024-11-10 18:12:27,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:27,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330302631] [2024-11-10 18:12:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:27,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:27,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:27,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330302631] [2024-11-10 18:12:27,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330302631] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:27,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:27,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:12:27,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285329700] [2024-11-10 18:12:27,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:27,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:12:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:12:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:12:27,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-10 18:12:27,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 118 transitions, 497 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:27,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:27,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-10 18:12:27,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:27,911 INFO L124 PetriNetUnfolderBase]: 2527/6019 cut-off events. [2024-11-10 18:12:27,911 INFO L125 PetriNetUnfolderBase]: For 2973/2973 co-relation queries the response was YES. [2024-11-10 18:12:27,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11864 conditions, 6019 events. 2527/6019 cut-off events. For 2973/2973 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 53873 event pairs, 1251 based on Foata normal form. 92/4713 useless extension candidates. Maximal degree in co-relation 7992. Up to 2347 conditions per place. [2024-11-10 18:12:28,012 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 103 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2024-11-10 18:12:28,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 164 transitions, 901 flow [2024-11-10 18:12:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:12:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:12:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 410 transitions. [2024-11-10 18:12:28,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6699346405228758 [2024-11-10 18:12:28,014 INFO L175 Difference]: Start difference. First operand has 124 places, 118 transitions, 497 flow. Second operand 6 states and 410 transitions. [2024-11-10 18:12:28,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 164 transitions, 901 flow [2024-11-10 18:12:28,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 164 transitions, 885 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:12:28,019 INFO L231 Difference]: Finished difference. Result has 129 places, 121 transitions, 551 flow [2024-11-10 18:12:28,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=551, PETRI_PLACES=129, PETRI_TRANSITIONS=121} [2024-11-10 18:12:28,019 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 36 predicate places. [2024-11-10 18:12:28,020 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 121 transitions, 551 flow [2024-11-10 18:12:28,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:28,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:28,020 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:28,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:12:28,020 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:28,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:28,021 INFO L85 PathProgramCache]: Analyzing trace with hash -230967734, now seen corresponding path program 1 times [2024-11-10 18:12:28,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:28,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836634383] [2024-11-10 18:12:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:12:28,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:28,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836634383] [2024-11-10 18:12:28,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836634383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:28,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:28,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:12:28,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215218582] [2024-11-10 18:12:28,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:28,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:12:28,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:12:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:12:28,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 102 [2024-11-10 18:12:28,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 121 transitions, 551 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:28,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:28,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 102 [2024-11-10 18:12:28,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:28,841 INFO L124 PetriNetUnfolderBase]: 3294/7342 cut-off events. [2024-11-10 18:12:28,842 INFO L125 PetriNetUnfolderBase]: For 4430/4430 co-relation queries the response was YES. [2024-11-10 18:12:28,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14976 conditions, 7342 events. 3294/7342 cut-off events. For 4430/4430 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 64477 event pairs, 2436 based on Foata normal form. 0/5751 useless extension candidates. Maximal degree in co-relation 10874. Up to 4802 conditions per place. [2024-11-10 18:12:28,880 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 63 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2024-11-10 18:12:28,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 117 transitions, 689 flow [2024-11-10 18:12:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:12:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:12:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 283 transitions. [2024-11-10 18:12:28,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5549019607843138 [2024-11-10 18:12:28,882 INFO L175 Difference]: Start difference. First operand has 129 places, 121 transitions, 551 flow. Second operand 5 states and 283 transitions. [2024-11-10 18:12:28,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 117 transitions, 689 flow [2024-11-10 18:12:28,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 117 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:12:28,887 INFO L231 Difference]: Finished difference. Result has 128 places, 117 transitions, 554 flow [2024-11-10 18:12:28,887 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=554, PETRI_PLACES=128, PETRI_TRANSITIONS=117} [2024-11-10 18:12:28,888 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 35 predicate places. [2024-11-10 18:12:28,888 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 117 transitions, 554 flow [2024-11-10 18:12:28,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:28,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:28,888 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:28,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:12:28,888 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:28,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash -230967733, now seen corresponding path program 1 times [2024-11-10 18:12:28,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:28,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326692743] [2024-11-10 18:12:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:28,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:29,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:29,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326692743] [2024-11-10 18:12:29,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326692743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:12:29,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964296250] [2024-11-10 18:12:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:29,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:29,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:12:29,172 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) [2024-11-10 18:12:29,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:12:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:29,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:12:29,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:12:29,249 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 [2024-11-10 18:12:29,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:12:29,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:12:29,346 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-10 18:12:29,347 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 [2024-11-10 18:12:29,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:12:29,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:12:29,401 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:12:29,402 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 [2024-11-10 18:12:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:29,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:12:29,745 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 162 treesize of output 156 [2024-11-10 18:12:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:29,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964296250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:12:29,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:12:29,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 18:12:29,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388684241] [2024-11-10 18:12:29,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:12:29,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:12:29,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:12:29,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:12:34,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 102 [2024-11-10 18:12:34,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 117 transitions, 554 flow. Second operand has 13 states, 13 states have (on average 44.84615384615385) internal successors, (583), 13 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:34,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:34,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 102 [2024-11-10 18:12:34,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:36,444 INFO L124 PetriNetUnfolderBase]: 6755/13375 cut-off events. [2024-11-10 18:12:36,444 INFO L125 PetriNetUnfolderBase]: For 6155/6155 co-relation queries the response was YES. [2024-11-10 18:12:36,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27124 conditions, 13375 events. 6755/13375 cut-off events. For 6155/6155 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 115865 event pairs, 1891 based on Foata normal form. 0/10356 useless extension candidates. Maximal degree in co-relation 22722. Up to 3555 conditions per place. [2024-11-10 18:12:36,561 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 134 selfloop transitions, 27 changer transitions 0/202 dead transitions. [2024-11-10 18:12:36,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 202 transitions, 1126 flow [2024-11-10 18:12:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:12:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:12:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 523 transitions. [2024-11-10 18:12:36,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5697167755991286 [2024-11-10 18:12:36,564 INFO L175 Difference]: Start difference. First operand has 128 places, 117 transitions, 554 flow. Second operand 9 states and 523 transitions. [2024-11-10 18:12:36,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 202 transitions, 1126 flow [2024-11-10 18:12:36,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 202 transitions, 1110 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:12:36,576 INFO L231 Difference]: Finished difference. Result has 134 places, 120 transitions, 620 flow [2024-11-10 18:12:36,576 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=620, PETRI_PLACES=134, PETRI_TRANSITIONS=120} [2024-11-10 18:12:36,577 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 41 predicate places. [2024-11-10 18:12:36,577 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 120 transitions, 620 flow [2024-11-10 18:12:36,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 44.84615384615385) internal successors, (583), 13 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:36,577 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:36,577 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:36,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:12:36,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:36,781 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:36,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1429935615, now seen corresponding path program 1 times [2024-11-10 18:12:36,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:36,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987578588] [2024-11-10 18:12:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:36,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:36,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987578588] [2024-11-10 18:12:36,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987578588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:12:36,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350168259] [2024-11-10 18:12:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:36,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:36,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:12:36,970 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) [2024-11-10 18:12:36,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:12:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:37,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:12:37,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:12:37,056 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 [2024-11-10 18:12:37,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:12:37,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:12:37,117 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:12:37,117 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 [2024-11-10 18:12:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:37,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:12:37,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:12:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:37,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350168259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:12:37,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:12:37,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-10 18:12:37,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190950771] [2024-11-10 18:12:37,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:12:37,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:12:37,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:37,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:12:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:12:38,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-10 18:12:38,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 120 transitions, 620 flow. Second operand has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:38,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:38,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-10 18:12:38,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:39,102 INFO L124 PetriNetUnfolderBase]: 4528/9144 cut-off events. [2024-11-10 18:12:39,103 INFO L125 PetriNetUnfolderBase]: For 6794/6794 co-relation queries the response was YES. [2024-11-10 18:12:39,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19835 conditions, 9144 events. 4528/9144 cut-off events. For 6794/6794 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 75503 event pairs, 1571 based on Foata normal form. 0/7720 useless extension candidates. Maximal degree in co-relation 15831. Up to 2472 conditions per place. [2024-11-10 18:12:39,179 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 119 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-11-10 18:12:39,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 195 transitions, 1176 flow [2024-11-10 18:12:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:12:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:12:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 595 transitions. [2024-11-10 18:12:39,183 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-11-10 18:12:39,183 INFO L175 Difference]: Start difference. First operand has 134 places, 120 transitions, 620 flow. Second operand 9 states and 595 transitions. [2024-11-10 18:12:39,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 195 transitions, 1176 flow [2024-11-10 18:12:39,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 195 transitions, 1125 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-10 18:12:39,192 INFO L231 Difference]: Finished difference. Result has 139 places, 124 transitions, 675 flow [2024-11-10 18:12:39,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=675, PETRI_PLACES=139, PETRI_TRANSITIONS=124} [2024-11-10 18:12:39,193 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 46 predicate places. [2024-11-10 18:12:39,193 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 124 transitions, 675 flow [2024-11-10 18:12:39,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:39,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:39,194 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:39,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 18:12:39,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 18:12:39,394 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:39,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1429935614, now seen corresponding path program 1 times [2024-11-10 18:12:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:39,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161658835] [2024-11-10 18:12:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:39,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:39,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:39,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161658835] [2024-11-10 18:12:39,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161658835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:39,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:39,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:12:39,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984932293] [2024-11-10 18:12:39,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:39,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:12:39,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:12:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:12:39,557 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 102 [2024-11-10 18:12:39,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 124 transitions, 675 flow. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:39,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:39,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 102 [2024-11-10 18:12:39,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:40,203 INFO L124 PetriNetUnfolderBase]: 5455/10893 cut-off events. [2024-11-10 18:12:40,203 INFO L125 PetriNetUnfolderBase]: For 10290/10290 co-relation queries the response was YES. [2024-11-10 18:12:40,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24540 conditions, 10893 events. 5455/10893 cut-off events. For 10290/10290 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 92349 event pairs, 4173 based on Foata normal form. 190/9443 useless extension candidates. Maximal degree in co-relation 19858. Up to 7881 conditions per place. [2024-11-10 18:12:40,269 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 62 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-11-10 18:12:40,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 120 transitions, 827 flow [2024-11-10 18:12:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:12:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:12:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 287 transitions. [2024-11-10 18:12:40,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5627450980392157 [2024-11-10 18:12:40,271 INFO L175 Difference]: Start difference. First operand has 139 places, 124 transitions, 675 flow. Second operand 5 states and 287 transitions. [2024-11-10 18:12:40,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 120 transitions, 827 flow [2024-11-10 18:12:40,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 120 transitions, 785 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-10 18:12:40,282 INFO L231 Difference]: Finished difference. Result has 134 places, 120 transitions, 661 flow [2024-11-10 18:12:40,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=134, PETRI_TRANSITIONS=120} [2024-11-10 18:12:40,282 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 41 predicate places. [2024-11-10 18:12:40,282 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 120 transitions, 661 flow [2024-11-10 18:12:40,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:40,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:40,283 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:40,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 18:12:40,283 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:40,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1503122661, now seen corresponding path program 1 times [2024-11-10 18:12:40,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:40,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46699733] [2024-11-10 18:12:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:40,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:40,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:40,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46699733] [2024-11-10 18:12:40,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46699733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:40,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:40,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:12:40,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689281401] [2024-11-10 18:12:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:40,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:12:40,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:12:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:12:40,382 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-10 18:12:40,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 120 transitions, 661 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:40,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:40,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-10 18:12:40,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:40,946 INFO L124 PetriNetUnfolderBase]: 3479/7435 cut-off events. [2024-11-10 18:12:40,946 INFO L125 PetriNetUnfolderBase]: For 6861/6921 co-relation queries the response was YES. [2024-11-10 18:12:40,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16430 conditions, 7435 events. 3479/7435 cut-off events. For 6861/6921 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 62036 event pairs, 2143 based on Foata normal form. 94/6378 useless extension candidates. Maximal degree in co-relation 12808. Up to 3761 conditions per place. [2024-11-10 18:12:40,999 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 105 selfloop transitions, 16 changer transitions 0/158 dead transitions. [2024-11-10 18:12:40,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 158 transitions, 1089 flow [2024-11-10 18:12:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:12:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:12:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 403 transitions. [2024-11-10 18:12:41,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6584967320261438 [2024-11-10 18:12:41,001 INFO L175 Difference]: Start difference. First operand has 134 places, 120 transitions, 661 flow. Second operand 6 states and 403 transitions. [2024-11-10 18:12:41,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 158 transitions, 1089 flow [2024-11-10 18:12:41,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 158 transitions, 1065 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:12:41,010 INFO L231 Difference]: Finished difference. Result has 138 places, 122 transitions, 693 flow [2024-11-10 18:12:41,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=693, PETRI_PLACES=138, PETRI_TRANSITIONS=122} [2024-11-10 18:12:41,010 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 45 predicate places. [2024-11-10 18:12:41,010 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 122 transitions, 693 flow [2024-11-10 18:12:41,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:41,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:41,011 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:41,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-10 18:12:41,011 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:41,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:41,011 INFO L85 PathProgramCache]: Analyzing trace with hash 116376867, now seen corresponding path program 1 times [2024-11-10 18:12:41,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:41,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639406399] [2024-11-10 18:12:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:41,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:12:41,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:41,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639406399] [2024-11-10 18:12:41,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639406399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:12:41,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82020693] [2024-11-10 18:12:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:41,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:41,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:12:41,329 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) [2024-11-10 18:12:41,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:12:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:41,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:12:41,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:12:41,413 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 [2024-11-10 18:12:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:12:41,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:12:41,484 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-10 18:12:41,484 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 [2024-11-10 18:12:41,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:12:41,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:12:41,517 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:12:41,518 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 [2024-11-10 18:12:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:41,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:12:41,768 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 100 treesize of output 96 [2024-11-10 18:12:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:41,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82020693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:12:41,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:12:41,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 15 [2024-11-10 18:12:41,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166177907] [2024-11-10 18:12:41,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:12:41,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 18:12:41,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:41,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 18:12:41,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-10 18:12:46,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 102 [2024-11-10 18:12:46,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 122 transitions, 693 flow. Second operand has 17 states, 17 states have (on average 46.76470588235294) internal successors, (795), 17 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:46,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:46,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 102 [2024-11-10 18:12:46,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:48,377 INFO L124 PetriNetUnfolderBase]: 8901/17490 cut-off events. [2024-11-10 18:12:48,378 INFO L125 PetriNetUnfolderBase]: For 14276/14452 co-relation queries the response was YES. [2024-11-10 18:12:48,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37698 conditions, 17490 events. 8901/17490 cut-off events. For 14276/14452 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 154723 event pairs, 2286 based on Foata normal form. 0/14444 useless extension candidates. Maximal degree in co-relation 34037. Up to 4948 conditions per place. [2024-11-10 18:12:48,462 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 143 selfloop transitions, 31 changer transitions 0/209 dead transitions. [2024-11-10 18:12:48,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 209 transitions, 1384 flow [2024-11-10 18:12:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:12:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:12:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 537 transitions. [2024-11-10 18:12:48,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-11-10 18:12:48,464 INFO L175 Difference]: Start difference. First operand has 138 places, 122 transitions, 693 flow. Second operand 9 states and 537 transitions. [2024-11-10 18:12:48,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 209 transitions, 1384 flow [2024-11-10 18:12:48,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 209 transitions, 1356 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:12:48,476 INFO L231 Difference]: Finished difference. Result has 144 places, 123 transitions, 751 flow [2024-11-10 18:12:48,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=751, PETRI_PLACES=144, PETRI_TRANSITIONS=123} [2024-11-10 18:12:48,476 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 51 predicate places. [2024-11-10 18:12:48,476 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 123 transitions, 751 flow [2024-11-10 18:12:48,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 46.76470588235294) internal successors, (795), 17 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:48,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:48,477 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:48,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 18:12:48,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 18:12:48,678 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:48,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash -687283654, now seen corresponding path program 1 times [2024-11-10 18:12:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:48,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142851402] [2024-11-10 18:12:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:48,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:48,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:48,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142851402] [2024-11-10 18:12:48,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142851402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:12:48,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:12:48,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:12:48,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506847090] [2024-11-10 18:12:48,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:12:48,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:12:48,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:48,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:12:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:12:48,867 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 102 [2024-11-10 18:12:48,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 123 transitions, 751 flow. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:48,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:48,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 102 [2024-11-10 18:12:48,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:49,825 INFO L124 PetriNetUnfolderBase]: 6683/13688 cut-off events. [2024-11-10 18:12:49,826 INFO L125 PetriNetUnfolderBase]: For 15415/15715 co-relation queries the response was YES. [2024-11-10 18:12:49,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31139 conditions, 13688 events. 6683/13688 cut-off events. For 15415/15715 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 120754 event pairs, 5305 based on Foata normal form. 0/12582 useless extension candidates. Maximal degree in co-relation 27374. Up to 9657 conditions per place. [2024-11-10 18:12:49,902 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 68 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2024-11-10 18:12:49,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 119 transitions, 905 flow [2024-11-10 18:12:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:12:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:12:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2024-11-10 18:12:49,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5906862745098039 [2024-11-10 18:12:49,907 INFO L175 Difference]: Start difference. First operand has 144 places, 123 transitions, 751 flow. Second operand 4 states and 241 transitions. [2024-11-10 18:12:49,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 119 transitions, 905 flow [2024-11-10 18:12:49,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 119 transitions, 852 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-10 18:12:49,919 INFO L231 Difference]: Finished difference. Result has 137 places, 119 transitions, 716 flow [2024-11-10 18:12:49,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=716, PETRI_PLACES=137, PETRI_TRANSITIONS=119} [2024-11-10 18:12:49,919 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 44 predicate places. [2024-11-10 18:12:49,919 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 119 transitions, 716 flow [2024-11-10 18:12:49,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:49,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:49,920 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:49,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-10 18:12:49,920 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:49,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -687283653, now seen corresponding path program 1 times [2024-11-10 18:12:49,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:49,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483740521] [2024-11-10 18:12:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:49,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:50,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:50,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483740521] [2024-11-10 18:12:50,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483740521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:12:50,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282370747] [2024-11-10 18:12:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:50,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:50,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:12:50,088 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) [2024-11-10 18:12:50,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:12:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:50,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:12:50,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:12:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:50,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:12:50,280 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 [2024-11-10 18:12:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282370747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:12:50,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:12:50,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 18:12:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132865266] [2024-11-10 18:12:50,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:12:50,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 18:12:50,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:50,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 18:12:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:12:50,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-10 18:12:50,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 119 transitions, 716 flow. Second operand has 12 states, 12 states have (on average 58.083333333333336) internal successors, (697), 12 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:50,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:12:50,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-10 18:12:50,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:12:52,060 INFO L124 PetriNetUnfolderBase]: 6143/11677 cut-off events. [2024-11-10 18:12:52,060 INFO L125 PetriNetUnfolderBase]: For 13107/13335 co-relation queries the response was YES. [2024-11-10 18:12:52,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27534 conditions, 11677 events. 6143/11677 cut-off events. For 13107/13335 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 94747 event pairs, 2012 based on Foata normal form. 0/10697 useless extension candidates. Maximal degree in co-relation 24069. Up to 2957 conditions per place. [2024-11-10 18:12:52,117 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 118 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-11-10 18:12:52,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 186 transitions, 1292 flow [2024-11-10 18:12:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:12:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:12:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 500 transitions. [2024-11-10 18:12:52,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7002801120448179 [2024-11-10 18:12:52,118 INFO L175 Difference]: Start difference. First operand has 137 places, 119 transitions, 716 flow. Second operand 7 states and 500 transitions. [2024-11-10 18:12:52,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 186 transitions, 1292 flow [2024-11-10 18:12:52,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 186 transitions, 1278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:12:52,129 INFO L231 Difference]: Finished difference. Result has 142 places, 119 transitions, 784 flow [2024-11-10 18:12:52,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=784, PETRI_PLACES=142, PETRI_TRANSITIONS=119} [2024-11-10 18:12:52,130 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 49 predicate places. [2024-11-10 18:12:52,130 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 119 transitions, 784 flow [2024-11-10 18:12:52,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 58.083333333333336) internal successors, (697), 12 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:12:52,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:12:52,130 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:12:52,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 18:12:52,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:52,335 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:12:52,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:12:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1378166608, now seen corresponding path program 1 times [2024-11-10 18:12:52,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:12:52,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231415754] [2024-11-10 18:12:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:52,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:12:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:52,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:12:52,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231415754] [2024-11-10 18:12:52,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231415754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:12:52,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516347905] [2024-11-10 18:12:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:12:52,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:12:52,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:12:52,518 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) [2024-11-10 18:12:52,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:12:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:12:52,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:12:52,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:12:52,603 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 [2024-11-10 18:12:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:12:52,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:12:52,651 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:12:52,652 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 [2024-11-10 18:12:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:52,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:12:52,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:12:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:12:52,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516347905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:12:52,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:12:52,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-10 18:12:52,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870370707] [2024-11-10 18:12:52,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:12:52,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:12:52,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:12:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:12:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:12:57,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:13:01,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:13:05,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:13:09,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:13:13,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:13:13,743 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 102 [2024-11-10 18:13:13,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 119 transitions, 784 flow. Second operand has 14 states, 14 states have (on average 50.92857142857143) internal successors, (713), 14 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:13,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:13:13,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 102 [2024-11-10 18:13:13,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:13:15,701 INFO L124 PetriNetUnfolderBase]: 11986/22068 cut-off events. [2024-11-10 18:13:15,701 INFO L125 PetriNetUnfolderBase]: For 33847/35050 co-relation queries the response was YES. [2024-11-10 18:13:15,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53028 conditions, 22068 events. 11986/22068 cut-off events. For 33847/35050 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 193650 event pairs, 3573 based on Foata normal form. 0/20337 useless extension candidates. Maximal degree in co-relation 47616. Up to 5896 conditions per place. [2024-11-10 18:13:15,969 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 135 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-11-10 18:13:15,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 195 transitions, 1484 flow [2024-11-10 18:13:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:13:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:13:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 555 transitions. [2024-11-10 18:13:15,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6045751633986928 [2024-11-10 18:13:15,972 INFO L175 Difference]: Start difference. First operand has 142 places, 119 transitions, 784 flow. Second operand 9 states and 555 transitions. [2024-11-10 18:13:15,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 195 transitions, 1484 flow [2024-11-10 18:13:15,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 195 transitions, 1409 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-10 18:13:15,990 INFO L231 Difference]: Finished difference. Result has 146 places, 120 transitions, 810 flow [2024-11-10 18:13:15,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=810, PETRI_PLACES=146, PETRI_TRANSITIONS=120} [2024-11-10 18:13:15,991 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 53 predicate places. [2024-11-10 18:13:15,991 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 120 transitions, 810 flow [2024-11-10 18:13:15,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 50.92857142857143) internal successors, (713), 14 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:15,991 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:13:15,992 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:13:16,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 18:13:16,195 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,SelfDestructingSolverStorable20 [2024-11-10 18:13:16,196 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:13:16,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:13:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1997675477, now seen corresponding path program 1 times [2024-11-10 18:13:16,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:13:16,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633432956] [2024-11-10 18:13:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:16,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:13:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:16,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:13:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633432956] [2024-11-10 18:13:16,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633432956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:13:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582998166] [2024-11-10 18:13:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:16,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:13:16,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:13:16,299 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) [2024-11-10 18:13:16,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:13:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:16,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:13:16,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:13:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:16,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:13:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:16,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582998166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:13:16,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:13:16,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-10 18:13:16,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829254403] [2024-11-10 18:13:16,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:13:16,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 18:13:16,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:13:16,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 18:13:16,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:13:16,887 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-10 18:13:16,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 120 transitions, 810 flow. Second operand has 16 states, 16 states have (on average 57.5) internal successors, (920), 16 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:16,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:13:16,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-10 18:13:16,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:13:22,613 INFO L124 PetriNetUnfolderBase]: 26362/49730 cut-off events. [2024-11-10 18:13:22,613 INFO L125 PetriNetUnfolderBase]: For 86961/90399 co-relation queries the response was YES. [2024-11-10 18:13:22,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123996 conditions, 49730 events. 26362/49730 cut-off events. For 86961/90399 co-relation queries the response was YES. Maximal size of possible extension queue 1928. Compared 499295 event pairs, 11480 based on Foata normal form. 744/48604 useless extension candidates. Maximal degree in co-relation 63422. Up to 11160 conditions per place. [2024-11-10 18:13:22,980 INFO L140 encePairwiseOnDemand]: 87/102 looper letters, 309 selfloop transitions, 66 changer transitions 0/408 dead transitions. [2024-11-10 18:13:22,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 408 transitions, 3208 flow [2024-11-10 18:13:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-10 18:13:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-10 18:13:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1866 transitions. [2024-11-10 18:13:22,983 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6308316430020284 [2024-11-10 18:13:22,983 INFO L175 Difference]: Start difference. First operand has 146 places, 120 transitions, 810 flow. Second operand 29 states and 1866 transitions. [2024-11-10 18:13:22,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 408 transitions, 3208 flow [2024-11-10 18:13:23,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 408 transitions, 3074 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-11-10 18:13:23,051 INFO L231 Difference]: Finished difference. Result has 179 places, 163 transitions, 1316 flow [2024-11-10 18:13:23,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1316, PETRI_PLACES=179, PETRI_TRANSITIONS=163} [2024-11-10 18:13:23,052 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 86 predicate places. [2024-11-10 18:13:23,052 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 163 transitions, 1316 flow [2024-11-10 18:13:23,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.5) internal successors, (920), 16 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:23,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:13:23,053 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:13:23,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 18:13:23,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:13:23,254 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:13:23,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:13:23,254 INFO L85 PathProgramCache]: Analyzing trace with hash -226507326, now seen corresponding path program 1 times [2024-11-10 18:13:23,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:13:23,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285100435] [2024-11-10 18:13:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:23,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:13:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:23,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:13:23,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285100435] [2024-11-10 18:13:23,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285100435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:13:23,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118570749] [2024-11-10 18:13:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:23,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:13:23,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:13:23,362 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) [2024-11-10 18:13:23,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:13:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:23,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:13:23,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:13:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:23,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:13:23,560 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 [2024-11-10 18:13:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:23,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118570749] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:13:23,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:13:23,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-10 18:13:23,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279615789] [2024-11-10 18:13:23,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:13:23,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:13:23,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:13:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:13:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:13:23,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-10 18:13:23,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 163 transitions, 1316 flow. Second operand has 11 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:23,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:13:23,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-10 18:13:23,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:13:29,622 INFO L124 PetriNetUnfolderBase]: 27902/50702 cut-off events. [2024-11-10 18:13:29,622 INFO L125 PetriNetUnfolderBase]: For 107636/111900 co-relation queries the response was YES. [2024-11-10 18:13:30,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130284 conditions, 50702 events. 27902/50702 cut-off events. For 107636/111900 co-relation queries the response was YES. Maximal size of possible extension queue 2035. Compared 496948 event pairs, 9106 based on Foata normal form. 0/49148 useless extension candidates. Maximal degree in co-relation 95687. Up to 12935 conditions per place. [2024-11-10 18:13:30,315 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 168 selfloop transitions, 42 changer transitions 0/251 dead transitions. [2024-11-10 18:13:30,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 251 transitions, 2350 flow [2024-11-10 18:13:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:13:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:13:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2024-11-10 18:13:30,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6946778711484594 [2024-11-10 18:13:30,317 INFO L175 Difference]: Start difference. First operand has 179 places, 163 transitions, 1316 flow. Second operand 7 states and 496 transitions. [2024-11-10 18:13:30,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 251 transitions, 2350 flow [2024-11-10 18:13:30,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 251 transitions, 2316 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-10 18:13:30,417 INFO L231 Difference]: Finished difference. Result has 181 places, 163 transitions, 1386 flow [2024-11-10 18:13:30,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1386, PETRI_PLACES=181, PETRI_TRANSITIONS=163} [2024-11-10 18:13:30,418 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 88 predicate places. [2024-11-10 18:13:30,418 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 163 transitions, 1386 flow [2024-11-10 18:13:30,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:30,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:13:30,418 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:13:30,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-10 18:13:30,619 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,SelfDestructingSolverStorable22 [2024-11-10 18:13:30,619 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:13:30,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:13:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2005872879, now seen corresponding path program 1 times [2024-11-10 18:13:30,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:13:30,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074178276] [2024-11-10 18:13:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:30,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:13:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:30,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:13:30,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074178276] [2024-11-10 18:13:30,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074178276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:13:30,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114472251] [2024-11-10 18:13:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:30,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:13:30,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:13:30,688 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) [2024-11-10 18:13:30,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:13:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:30,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:13:30,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:13:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:30,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:13:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:30,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114472251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:13:30,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:13:30,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-10 18:13:30,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875372539] [2024-11-10 18:13:30,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:13:30,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 18:13:30,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:13:30,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 18:13:30,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:13:31,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-10 18:13:31,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 163 transitions, 1386 flow. Second operand has 16 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:31,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:13:31,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-10 18:13:31,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:13:39,863 INFO L124 PetriNetUnfolderBase]: 38823/73294 cut-off events. [2024-11-10 18:13:39,864 INFO L125 PetriNetUnfolderBase]: For 172931/178511 co-relation queries the response was YES. [2024-11-10 18:13:40,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195794 conditions, 73294 events. 38823/73294 cut-off events. For 172931/178511 co-relation queries the response was YES. Maximal size of possible extension queue 2870. Compared 779572 event pairs, 14057 based on Foata normal form. 1201/72208 useless extension candidates. Maximal degree in co-relation 138780. Up to 18410 conditions per place. [2024-11-10 18:13:41,059 INFO L140 encePairwiseOnDemand]: 87/102 looper letters, 300 selfloop transitions, 75 changer transitions 0/408 dead transitions. [2024-11-10 18:13:41,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 408 transitions, 3693 flow [2024-11-10 18:13:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-10 18:13:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-10 18:13:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1733 transitions. [2024-11-10 18:13:41,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6292665214233841 [2024-11-10 18:13:41,062 INFO L175 Difference]: Start difference. First operand has 181 places, 163 transitions, 1386 flow. Second operand 27 states and 1733 transitions. [2024-11-10 18:13:41,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 408 transitions, 3693 flow [2024-11-10 18:13:41,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 408 transitions, 3551 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-10 18:13:41,298 INFO L231 Difference]: Finished difference. Result has 207 places, 178 transitions, 1646 flow [2024-11-10 18:13:41,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1646, PETRI_PLACES=207, PETRI_TRANSITIONS=178} [2024-11-10 18:13:41,299 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 114 predicate places. [2024-11-10 18:13:41,299 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 178 transitions, 1646 flow [2024-11-10 18:13:41,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:41,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:13:41,300 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:13:41,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 18:13:41,500 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,SelfDestructingSolverStorable23 [2024-11-10 18:13:41,500 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:13:41,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:13:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2134244376, now seen corresponding path program 1 times [2024-11-10 18:13:41,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:13:41,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638864640] [2024-11-10 18:13:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:41,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:13:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:41,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:13:41,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638864640] [2024-11-10 18:13:41,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638864640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:13:41,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200243052] [2024-11-10 18:13:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:41,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:13:41,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:13:41,639 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) [2024-11-10 18:13:41,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:13:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:41,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:13:41,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:13:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:41,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:13:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:13:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200243052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:13:41,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:13:41,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-10 18:13:41,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480355948] [2024-11-10 18:13:41,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:13:41,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 18:13:41,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:13:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 18:13:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:13:42,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-10 18:13:42,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 178 transitions, 1646 flow. Second operand has 16 states, 16 states have (on average 57.875) internal successors, (926), 16 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:42,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:13:42,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-10 18:13:42,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand