./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-word-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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:33:52,657 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:33:52,756 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:33:52,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:33:52,763 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:33:52,781 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:33:52,782 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:33:52,782 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:33:52,783 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:33:52,783 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:33:52,783 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:33:52,784 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:33:52,785 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:33:52,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:33:52,787 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:33:52,788 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:33:52,788 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:33:52,788 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:33:52,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:33:52,789 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:33:52,789 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:33:52,794 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:33:52,794 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:33:52,794 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:33:52,794 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:33:52,794 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:33:52,795 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:33:52,795 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:33:52,795 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:33:52,795 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:33:52,796 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:33:52,796 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:33:52,796 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:33:52,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:52,796 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:33:52,797 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:33:52,797 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:33:52,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:33:52,799 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:33:52,799 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:33:52,799 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:33:52,800 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:33:52,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2024-11-17 03:33:53,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:33:53,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:33:53,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:33:53,083 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:33:53,083 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:33:53,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-17 03:33:54,506 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:33:54,724 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:33:54,726 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-17 03:33:54,738 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4424b2f49/fe3da6fe78cd44f4aad0768d2d375047/FLAG7e78867b5 [2024-11-17 03:33:54,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4424b2f49/fe3da6fe78cd44f4aad0768d2d375047 [2024-11-17 03:33:54,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:33:54,756 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:33:54,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:54,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:33:54,764 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:33:54,764 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:54" (1/1) ... [2024-11-17 03:33:54,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@abdbbfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:54, skipping insertion in model container [2024-11-17 03:33:54,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:54" (1/1) ... [2024-11-17 03:33:54,797 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:33:55,008 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:33:55,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:55,018 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:33:55,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:55,067 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:33:55,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55 WrapperNode [2024-11-17 03:33:55,068 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:55,072 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:55,072 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:33:55,072 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:33:55,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,088 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,109 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 168 [2024-11-17 03:33:55,109 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:55,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:33:55,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:33:55,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:33:55,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,123 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,139 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]. [2024-11-17 03:33:55,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,140 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,149 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,152 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,157 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:33:55,157 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:33:55,158 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:33:55,158 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:33:55,159 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (1/1) ... [2024-11-17 03:33:55,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:55,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:55,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:33:55,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:33:55,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:33:55,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:33:55,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:33:55,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:33:55,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:33:55,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:33:55,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:33:55,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:33:55,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:33:55,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:33:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:33:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:33:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:33:55,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:33:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:33:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:33:55,268 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:33:55,418 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:33:55,421 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:33:56,004 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:33:56,005 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:33:56,323 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:33:56,323 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:33:56,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:56 BoogieIcfgContainer [2024-11-17 03:33:56,324 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:33:56,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:33:56,328 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:33:56,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:33:56,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:33:54" (1/3) ... [2024-11-17 03:33:56,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64dcdaad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:56, skipping insertion in model container [2024-11-17 03:33:56,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:55" (2/3) ... [2024-11-17 03:33:56,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64dcdaad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:56, skipping insertion in model container [2024-11-17 03:33:56,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:56" (3/3) ... [2024-11-17 03:33:56,336 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2024-11-17 03:33:56,353 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:33:56,354 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-17 03:33:56,354 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:33:56,441 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:33:56,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 111 transitions, 243 flow [2024-11-17 03:33:56,553 INFO L124 PetriNetUnfolderBase]: 18/108 cut-off events. [2024-11-17 03:33:56,554 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:33:56,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 108 events. 18/108 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 322 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 79. Up to 3 conditions per place. [2024-11-17 03:33:56,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 111 transitions, 243 flow [2024-11-17 03:33:56,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 232 flow [2024-11-17 03:33:56,579 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:33:56,589 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;@3c02574c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:33:56,590 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-17 03:33:56,595 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:33:56,596 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:33:56,596 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:33:56,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:56,597 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:56,598 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:33:56,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash 21900443, now seen corresponding path program 1 times [2024-11-17 03:33:56,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:56,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347744877] [2024-11-17 03:33:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:56,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:56,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:56,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347744877] [2024-11-17 03:33:56,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347744877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:56,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:56,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:33:56,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762516380] [2024-11-17 03:33:56,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:56,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:56,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:57,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-17 03:33:57,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 232 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) [2024-11-17 03:33:57,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:57,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-17 03:33:57,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:57,861 INFO L124 PetriNetUnfolderBase]: 2426/4508 cut-off events. [2024-11-17 03:33:57,861 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2024-11-17 03:33:57,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4508 events. 2426/4508 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30949 event pairs, 1460 based on Foata normal form. 316/3275 useless extension candidates. Maximal degree in co-relation 7396. Up to 3188 conditions per place. [2024-11-17 03:33:57,910 INFO L140 encePairwiseOnDemand]: 99/111 looper letters, 42 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-11-17 03:33:57,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 96 transitions, 298 flow [2024-11-17 03:33:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2024-11-17 03:33:57,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-17 03:33:57,928 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 232 flow. Second operand 3 states and 222 transitions. [2024-11-17 03:33:57,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 96 transitions, 298 flow [2024-11-17 03:33:57,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 286 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:33:57,944 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 202 flow [2024-11-17 03:33:57,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-11-17 03:33:57,952 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2024-11-17 03:33:57,953 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 202 flow [2024-11-17 03:33:57,953 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) [2024-11-17 03:33:57,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:57,953 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:57,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:33:57,954 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:33:57,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:57,955 INFO L85 PathProgramCache]: Analyzing trace with hash 21900444, now seen corresponding path program 1 times [2024-11-17 03:33:57,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:57,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154690725] [2024-11-17 03:33:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:57,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:58,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:58,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154690725] [2024-11-17 03:33:58,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154690725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:58,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:58,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:58,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628622879] [2024-11-17 03:33:58,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:58,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:58,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:58,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:58,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:58,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-17 03:33:58,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 202 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) [2024-11-17 03:33:58,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:58,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-17 03:33:58,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:58,888 INFO L124 PetriNetUnfolderBase]: 2427/4513 cut-off events. [2024-11-17 03:33:58,889 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-17 03:33:58,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 4513 events. 2427/4513 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30944 event pairs, 1460 based on Foata normal form. 0/2961 useless extension candidates. Maximal degree in co-relation 7725. Up to 3201 conditions per place. [2024-11-17 03:33:58,922 INFO L140 encePairwiseOnDemand]: 106/111 looper letters, 46 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-17 03:33:58,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 99 transitions, 308 flow [2024-11-17 03:33:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 275 transitions. [2024-11-17 03:33:58,925 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6193693693693694 [2024-11-17 03:33:58,925 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 202 flow. Second operand 4 states and 275 transitions. [2024-11-17 03:33:58,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 99 transitions, 308 flow [2024-11-17 03:33:58,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 99 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:58,931 INFO L231 Difference]: Finished difference. Result has 93 places, 99 transitions, 225 flow [2024-11-17 03:33:58,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=93, PETRI_TRANSITIONS=99} [2024-11-17 03:33:58,933 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -6 predicate places. [2024-11-17 03:33:58,933 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 99 transitions, 225 flow [2024-11-17 03:33:58,934 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) [2024-11-17 03:33:58,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:58,934 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:33:58,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:33:58,935 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:33:58,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash -398182745, now seen corresponding path program 1 times [2024-11-17 03:33:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:58,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113854959] [2024-11-17 03:33:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:59,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:59,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113854959] [2024-11-17 03:33:59,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113854959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:59,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607373505] [2024-11-17 03:33:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:59,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:59,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:59,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:33:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:59,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:33:59,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:59,380 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 [2024-11-17 03:33:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:59,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607373505] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:59,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:59,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:33:59,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095249035] [2024-11-17 03:33:59,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:59,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:33:59,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:59,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:33:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:34:00,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-17 03:34:00,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 99 transitions, 225 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) [2024-11-17 03:34:00,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:00,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-17 03:34:00,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:00,910 INFO L124 PetriNetUnfolderBase]: 2428/4517 cut-off events. [2024-11-17 03:34:00,911 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-17 03:34:00,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7794 conditions, 4517 events. 2428/4517 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30932 event pairs, 1460 based on Foata normal form. 0/2964 useless extension candidates. Maximal degree in co-relation 7757. Up to 3198 conditions per place. [2024-11-17 03:34:00,952 INFO L140 encePairwiseOnDemand]: 102/111 looper letters, 43 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-11-17 03:34:00,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 103 transitions, 351 flow [2024-11-17 03:34:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:34:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:34:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 536 transitions. [2024-11-17 03:34:00,956 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365365365365365 [2024-11-17 03:34:00,956 INFO L175 Difference]: Start difference. First operand has 93 places, 99 transitions, 225 flow. Second operand 9 states and 536 transitions. [2024-11-17 03:34:00,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 103 transitions, 351 flow [2024-11-17 03:34:00,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 103 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:34:00,959 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 258 flow [2024-11-17 03:34:00,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=258, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2024-11-17 03:34:00,960 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2024-11-17 03:34:00,960 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 258 flow [2024-11-17 03:34:00,961 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) [2024-11-17 03:34:00,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:00,961 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:00,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:34:01,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:01,166 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:01,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:01,167 INFO L85 PathProgramCache]: Analyzing trace with hash -399305514, now seen corresponding path program 1 times [2024-11-17 03:34:01,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:01,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837765433] [2024-11-17 03:34:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:01,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:01,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837765433] [2024-11-17 03:34:01,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837765433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:01,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:01,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:34:01,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331590997] [2024-11-17 03:34:01,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:01,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:34:01,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:01,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:34:01,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:34:01,530 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-17 03:34:01,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 258 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) [2024-11-17 03:34:01,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:01,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-17 03:34:01,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:02,062 INFO L124 PetriNetUnfolderBase]: 2429/4522 cut-off events. [2024-11-17 03:34:02,062 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-17 03:34:02,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7811 conditions, 4522 events. 2429/4522 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30939 event pairs, 1460 based on Foata normal form. 0/2971 useless extension candidates. Maximal degree in co-relation 7769. Up to 3201 conditions per place. [2024-11-17 03:34:02,098 INFO L140 encePairwiseOnDemand]: 103/111 looper letters, 47 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2024-11-17 03:34:02,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 104 transitions, 376 flow [2024-11-17 03:34:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:34:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:34:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2024-11-17 03:34:02,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-17 03:34:02,100 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 258 flow. Second operand 5 states and 333 transitions. [2024-11-17 03:34:02,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 104 transitions, 376 flow [2024-11-17 03:34:02,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 104 transitions, 334 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-17 03:34:02,103 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 258 flow [2024-11-17 03:34:02,103 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-11-17 03:34:02,104 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2024-11-17 03:34:02,104 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 258 flow [2024-11-17 03:34:02,105 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) [2024-11-17 03:34:02,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:02,105 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:02,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:34:02,105 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:02,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:02,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1349481305, now seen corresponding path program 1 times [2024-11-17 03:34:02,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:02,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744649386] [2024-11-17 03:34:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:02,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744649386] [2024-11-17 03:34:02,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744649386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:02,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147340972] [2024-11-17 03:34:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:02,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:34:02,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:34:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:02,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:34:02,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:02,439 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 [2024-11-17 03:34:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:02,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:34:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:02,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147340972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:34:02,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:34:02,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:34:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540864546] [2024-11-17 03:34:02,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:34:02,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:34:02,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:02,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:34:02,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:34:03,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-17 03:34:03,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 258 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) [2024-11-17 03:34:03,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:03,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-17 03:34:03,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:04,443 INFO L124 PetriNetUnfolderBase]: 2430/4526 cut-off events. [2024-11-17 03:34:04,444 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-17 03:34:04,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7820 conditions, 4526 events. 2430/4526 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31025 event pairs, 1460 based on Foata normal form. 0/2975 useless extension candidates. Maximal degree in co-relation 7752. Up to 3193 conditions per place. [2024-11-17 03:34:04,471 INFO L140 encePairwiseOnDemand]: 101/111 looper letters, 44 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-11-17 03:34:04,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 402 flow [2024-11-17 03:34:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:34:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:34:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 596 transitions. [2024-11-17 03:34:04,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5369369369369369 [2024-11-17 03:34:04,474 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 258 flow. Second operand 10 states and 596 transitions. [2024-11-17 03:34:04,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 402 flow [2024-11-17 03:34:04,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 110 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:34:04,479 INFO L231 Difference]: Finished difference. Result has 104 places, 106 transitions, 300 flow [2024-11-17 03:34:04,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=300, PETRI_PLACES=104, PETRI_TRANSITIONS=106} [2024-11-17 03:34:04,481 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 5 predicate places. [2024-11-17 03:34:04,481 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 106 transitions, 300 flow [2024-11-17 03:34:04,482 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) [2024-11-17 03:34:04,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:04,482 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:04,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:34:04,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:04,687 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:04,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:04,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1349179805, now seen corresponding path program 1 times [2024-11-17 03:34:04,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:04,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136057055] [2024-11-17 03:34:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:04,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:04,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:04,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136057055] [2024-11-17 03:34:04,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136057055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:04,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:04,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:34:04,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709938466] [2024-11-17 03:34:04,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:04,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:34:04,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:04,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:34:04,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:34:05,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-17 03:34:05,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 300 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) [2024-11-17 03:34:05,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:05,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-17 03:34:05,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:05,400 INFO L124 PetriNetUnfolderBase]: 2431/4531 cut-off events. [2024-11-17 03:34:05,400 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-11-17 03:34:05,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7840 conditions, 4531 events. 2431/4531 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31056 event pairs, 1460 based on Foata normal form. 0/2981 useless extension candidates. Maximal degree in co-relation 7762. Up to 3206 conditions per place. [2024-11-17 03:34:05,433 INFO L140 encePairwiseOnDemand]: 102/111 looper letters, 50 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-11-17 03:34:05,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 428 flow [2024-11-17 03:34:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:34:05,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:34:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 332 transitions. [2024-11-17 03:34:05,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5981981981981982 [2024-11-17 03:34:05,435 INFO L175 Difference]: Start difference. First operand has 104 places, 106 transitions, 300 flow. Second operand 5 states and 332 transitions. [2024-11-17 03:34:05,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 428 flow [2024-11-17 03:34:05,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 109 transitions, 386 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-17 03:34:05,438 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 306 flow [2024-11-17 03:34:05,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2024-11-17 03:34:05,439 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 4 predicate places. [2024-11-17 03:34:05,439 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 306 flow [2024-11-17 03:34:05,440 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) [2024-11-17 03:34:05,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:05,440 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:05,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:34:05,441 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:05,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1112250156, now seen corresponding path program 1 times [2024-11-17 03:34:05,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:05,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736607651] [2024-11-17 03:34:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:05,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:05,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:05,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736607651] [2024-11-17 03:34:05,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736607651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:05,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530368648] [2024-11-17 03:34:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:05,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:05,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:05,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:34:05,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:34:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:05,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:34:05,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:05,744 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 [2024-11-17 03:34:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:05,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:34:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:06,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530368648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:34:06,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:34:06,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:34:06,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065580096] [2024-11-17 03:34:06,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:34:06,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:34:06,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:06,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:34:06,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:34:06,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-17 03:34:06,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 306 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) [2024-11-17 03:34:06,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:06,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-17 03:34:06,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:07,706 INFO L124 PetriNetUnfolderBase]: 2431/4530 cut-off events. [2024-11-17 03:34:07,706 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-17 03:34:07,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 4530 events. 2431/4530 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 31049 event pairs, 1460 based on Foata normal form. 0/2981 useless extension candidates. Maximal degree in co-relation 7780. Up to 3197 conditions per place. [2024-11-17 03:34:07,736 INFO L140 encePairwiseOnDemand]: 101/111 looper letters, 44 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-11-17 03:34:07,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 110 transitions, 434 flow [2024-11-17 03:34:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:34:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:34:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 480 transitions. [2024-11-17 03:34:07,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-11-17 03:34:07,738 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 306 flow. Second operand 8 states and 480 transitions. [2024-11-17 03:34:07,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 110 transitions, 434 flow [2024-11-17 03:34:07,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 110 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:34:07,742 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 334 flow [2024-11-17 03:34:07,742 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2024-11-17 03:34:07,744 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 8 predicate places. [2024-11-17 03:34:07,744 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 334 flow [2024-11-17 03:34:07,745 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) [2024-11-17 03:34:07,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:07,745 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:07,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:34:07,949 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 [2024-11-17 03:34:07,950 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:07,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1798433854, now seen corresponding path program 1 times [2024-11-17 03:34:07,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:07,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50037046] [2024-11-17 03:34:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:07,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:08,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:08,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50037046] [2024-11-17 03:34:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50037046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:08,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:08,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:34:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398343682] [2024-11-17 03:34:08,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:08,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:34:08,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:08,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:34:08,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:34:08,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-17 03:34:08,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:08,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:08,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-17 03:34:08,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:08,739 INFO L124 PetriNetUnfolderBase]: 4370/8403 cut-off events. [2024-11-17 03:34:08,739 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-11-17 03:34:08,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14427 conditions, 8403 events. 4370/8403 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 65614 event pairs, 2486 based on Foata normal form. 114/5827 useless extension candidates. Maximal degree in co-relation 8806. Up to 3609 conditions per place. [2024-11-17 03:34:08,793 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 127 selfloop transitions, 6 changer transitions 0/178 dead transitions. [2024-11-17 03:34:08,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 178 transitions, 803 flow [2024-11-17 03:34:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:34:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:34:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 443 transitions. [2024-11-17 03:34:08,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6651651651651652 [2024-11-17 03:34:08,795 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 334 flow. Second operand 6 states and 443 transitions. [2024-11-17 03:34:08,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 178 transitions, 803 flow [2024-11-17 03:34:08,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 178 transitions, 735 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-17 03:34:08,799 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 327 flow [2024-11-17 03:34:08,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-11-17 03:34:08,799 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 9 predicate places. [2024-11-17 03:34:08,800 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 327 flow [2024-11-17 03:34:08,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:08,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:08,800 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:08,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:34:08,801 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:08,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:08,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1052641359, now seen corresponding path program 1 times [2024-11-17 03:34:08,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:08,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240707863] [2024-11-17 03:34:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:08,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:08,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240707863] [2024-11-17 03:34:08,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240707863] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:08,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:08,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:34:08,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229767243] [2024-11-17 03:34:08,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:08,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:34:08,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:34:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:34:08,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-17 03:34:08,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 327 flow. Second operand has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:08,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:08,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-17 03:34:08,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:09,530 INFO L124 PetriNetUnfolderBase]: 3820/7332 cut-off events. [2024-11-17 03:34:09,530 INFO L125 PetriNetUnfolderBase]: For 807/915 co-relation queries the response was YES. [2024-11-17 03:34:09,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13277 conditions, 7332 events. 3820/7332 cut-off events. For 807/915 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 55471 event pairs, 2255 based on Foata normal form. 87/5382 useless extension candidates. Maximal degree in co-relation 9170. Up to 3637 conditions per place. [2024-11-17 03:34:09,580 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 120 selfloop transitions, 6 changer transitions 0/171 dead transitions. [2024-11-17 03:34:09,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 171 transitions, 743 flow [2024-11-17 03:34:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:34:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:34:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 436 transitions. [2024-11-17 03:34:09,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6546546546546547 [2024-11-17 03:34:09,582 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 327 flow. Second operand 6 states and 436 transitions. [2024-11-17 03:34:09,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 171 transitions, 743 flow [2024-11-17 03:34:09,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 171 transitions, 741 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:34:09,587 INFO L231 Difference]: Finished difference. Result has 114 places, 113 transitions, 352 flow [2024-11-17 03:34:09,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=114, PETRI_TRANSITIONS=113} [2024-11-17 03:34:09,588 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 15 predicate places. [2024-11-17 03:34:09,588 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 113 transitions, 352 flow [2024-11-17 03:34:09,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:09,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:09,589 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:09,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:34:09,589 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:09,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash -284541495, now seen corresponding path program 1 times [2024-11-17 03:34:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:09,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024475998] [2024-11-17 03:34:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:09,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:09,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:09,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024475998] [2024-11-17 03:34:09,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024475998] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:09,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:09,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:34:09,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369415252] [2024-11-17 03:34:09,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:09,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:34:09,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:34:09,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:34:09,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-17 03:34:09,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 113 transitions, 352 flow. Second operand has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:09,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:09,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-17 03:34:09,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:10,516 INFO L124 PetriNetUnfolderBase]: 6295/13431 cut-off events. [2024-11-17 03:34:10,516 INFO L125 PetriNetUnfolderBase]: For 3013/3057 co-relation queries the response was YES. [2024-11-17 03:34:10,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24646 conditions, 13431 events. 6295/13431 cut-off events. For 3013/3057 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 122955 event pairs, 3617 based on Foata normal form. 114/9861 useless extension candidates. Maximal degree in co-relation 17847. Up to 4897 conditions per place. [2024-11-17 03:34:10,584 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 124 selfloop transitions, 10 changer transitions 0/179 dead transitions. [2024-11-17 03:34:10,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 179 transitions, 806 flow [2024-11-17 03:34:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:34:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:34:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 439 transitions. [2024-11-17 03:34:10,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6591591591591591 [2024-11-17 03:34:10,586 INFO L175 Difference]: Start difference. First operand has 114 places, 113 transitions, 352 flow. Second operand 6 states and 439 transitions. [2024-11-17 03:34:10,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 179 transitions, 806 flow [2024-11-17 03:34:10,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 179 transitions, 799 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:34:10,598 INFO L231 Difference]: Finished difference. Result has 119 places, 118 transitions, 413 flow [2024-11-17 03:34:10,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=119, PETRI_TRANSITIONS=118} [2024-11-17 03:34:10,599 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 20 predicate places. [2024-11-17 03:34:10,600 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 118 transitions, 413 flow [2024-11-17 03:34:10,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:10,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:10,600 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:10,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:34:10,600 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:10,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1440687907, now seen corresponding path program 1 times [2024-11-17 03:34:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424188166] [2024-11-17 03:34:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:10,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:10,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424188166] [2024-11-17 03:34:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424188166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:10,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:10,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:34:10,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050521424] [2024-11-17 03:34:10,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:10,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:34:10,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:10,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:34:10,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:34:10,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-17 03:34:10,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 118 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:10,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:10,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-17 03:34:10,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:11,559 INFO L124 PetriNetUnfolderBase]: 5696/11331 cut-off events. [2024-11-17 03:34:11,559 INFO L125 PetriNetUnfolderBase]: For 5507/5790 co-relation queries the response was YES. [2024-11-17 03:34:11,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22700 conditions, 11331 events. 5696/11331 cut-off events. For 5507/5790 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 92999 event pairs, 3504 based on Foata normal form. 134/8799 useless extension candidates. Maximal degree in co-relation 16338. Up to 5092 conditions per place. [2024-11-17 03:34:11,612 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 120 selfloop transitions, 8 changer transitions 0/173 dead transitions. [2024-11-17 03:34:11,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 849 flow [2024-11-17 03:34:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:34:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:34:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2024-11-17 03:34:11,614 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6471471471471472 [2024-11-17 03:34:11,614 INFO L175 Difference]: Start difference. First operand has 119 places, 118 transitions, 413 flow. Second operand 6 states and 431 transitions. [2024-11-17 03:34:11,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 849 flow [2024-11-17 03:34:11,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 173 transitions, 845 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:34:11,627 INFO L231 Difference]: Finished difference. Result has 125 places, 120 transitions, 440 flow [2024-11-17 03:34:11,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=440, PETRI_PLACES=125, PETRI_TRANSITIONS=120} [2024-11-17 03:34:11,628 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 26 predicate places. [2024-11-17 03:34:11,628 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 120 transitions, 440 flow [2024-11-17 03:34:11,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:11,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:11,630 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] [2024-11-17 03:34:11,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:34:11,630 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:11,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:11,631 INFO L85 PathProgramCache]: Analyzing trace with hash 768090906, now seen corresponding path program 1 times [2024-11-17 03:34:11,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:11,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521603320] [2024-11-17 03:34:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:11,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:11,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:11,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521603320] [2024-11-17 03:34:11,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521603320] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:11,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:11,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:34:11,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057856410] [2024-11-17 03:34:11,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:11,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:34:11,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:34:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:34:11,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-17 03:34:11,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 120 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:11,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:11,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-17 03:34:11,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:13,103 INFO L124 PetriNetUnfolderBase]: 9798/20406 cut-off events. [2024-11-17 03:34:13,103 INFO L125 PetriNetUnfolderBase]: For 12126/12301 co-relation queries the response was YES. [2024-11-17 03:34:13,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42205 conditions, 20406 events. 9798/20406 cut-off events. For 12126/12301 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 191172 event pairs, 5946 based on Foata normal form. 184/16590 useless extension candidates. Maximal degree in co-relation 30243. Up to 7672 conditions per place. [2024-11-17 03:34:13,238 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 135 selfloop transitions, 10 changer transitions 0/190 dead transitions. [2024-11-17 03:34:13,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 190 transitions, 1010 flow [2024-11-17 03:34:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:34:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:34:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 434 transitions. [2024-11-17 03:34:13,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6516516516516516 [2024-11-17 03:34:13,241 INFO L175 Difference]: Start difference. First operand has 125 places, 120 transitions, 440 flow. Second operand 6 states and 434 transitions. [2024-11-17 03:34:13,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 190 transitions, 1010 flow [2024-11-17 03:34:13,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 190 transitions, 999 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:34:13,320 INFO L231 Difference]: Finished difference. Result has 130 places, 125 transitions, 497 flow [2024-11-17 03:34:13,320 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=497, PETRI_PLACES=130, PETRI_TRANSITIONS=125} [2024-11-17 03:34:13,321 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 31 predicate places. [2024-11-17 03:34:13,321 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 125 transitions, 497 flow [2024-11-17 03:34:13,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:13,321 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:13,322 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] [2024-11-17 03:34:13,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:34:13,322 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:13,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1909288880, now seen corresponding path program 1 times [2024-11-17 03:34:13,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:13,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071413651] [2024-11-17 03:34:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:34:13,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:13,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071413651] [2024-11-17 03:34:13,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071413651] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:13,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:13,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:34:13,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786943816] [2024-11-17 03:34:13,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:13,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:34:13,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:13,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:34:13,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:34:13,570 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 111 [2024-11-17 03:34:13,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:13,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:13,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 111 [2024-11-17 03:34:13,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:15,077 INFO L124 PetriNetUnfolderBase]: 11427/22576 cut-off events. [2024-11-17 03:34:15,077 INFO L125 PetriNetUnfolderBase]: For 18068/18444 co-relation queries the response was YES. [2024-11-17 03:34:15,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49278 conditions, 22576 events. 11427/22576 cut-off events. For 18068/18444 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 202190 event pairs, 7878 based on Foata normal form. 0/18764 useless extension candidates. Maximal degree in co-relation 34259. Up to 15640 conditions per place. [2024-11-17 03:34:15,208 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 71 selfloop transitions, 6 changer transitions 0/121 dead transitions. [2024-11-17 03:34:15,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 121 transitions, 643 flow [2024-11-17 03:34:15,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:34:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:34:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 292 transitions. [2024-11-17 03:34:15,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5261261261261261 [2024-11-17 03:34:15,210 INFO L175 Difference]: Start difference. First operand has 130 places, 125 transitions, 497 flow. Second operand 5 states and 292 transitions. [2024-11-17 03:34:15,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 121 transitions, 643 flow [2024-11-17 03:34:15,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 121 transitions, 639 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:34:15,290 INFO L231 Difference]: Finished difference. Result has 129 places, 121 transitions, 497 flow [2024-11-17 03:34:15,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=129, PETRI_TRANSITIONS=121} [2024-11-17 03:34:15,292 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 30 predicate places. [2024-11-17 03:34:15,292 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 121 transitions, 497 flow [2024-11-17 03:34:15,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:15,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:15,293 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] [2024-11-17 03:34:15,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-17 03:34:15,294 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:15,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:15,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1909288881, now seen corresponding path program 1 times [2024-11-17 03:34:15,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:15,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397248815] [2024-11-17 03:34:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:15,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:15,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:15,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397248815] [2024-11-17 03:34:15,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397248815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:15,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766160669] [2024-11-17 03:34:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:15,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:15,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:15,606 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:34:15,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:34:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:15,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:34:15,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:15,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:34:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:34:15,772 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 [2024-11-17 03:34:15,797 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-17 03:34:15,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-17 03:34:15,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:34:15,858 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 [2024-11-17 03:34:15,868 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:34:15,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:34:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:15,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:34:16,409 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 [2024-11-17 03:34:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:16,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766160669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:34:16,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:34:16,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2024-11-17 03:34:16,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115145120] [2024-11-17 03:34:16,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:34:16,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:34:16,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:16,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:34:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:34:18,335 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2024-11-17 03:34:18,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 121 transitions, 497 flow. Second operand has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:18,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:18,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2024-11-17 03:34:18,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:20,908 INFO L124 PetriNetUnfolderBase]: 15536/29185 cut-off events. [2024-11-17 03:34:20,908 INFO L125 PetriNetUnfolderBase]: For 21379/22391 co-relation queries the response was YES. [2024-11-17 03:34:21,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63993 conditions, 29185 events. 15536/29185 cut-off events. For 21379/22391 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 253624 event pairs, 6597 based on Foata normal form. 0/24012 useless extension candidates. Maximal degree in co-relation 46864. Up to 8137 conditions per place. [2024-11-17 03:34:21,165 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 154 selfloop transitions, 24 changer transitions 0/220 dead transitions. [2024-11-17 03:34:21,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 220 transitions, 1187 flow [2024-11-17 03:34:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:34:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:34:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 568 transitions. [2024-11-17 03:34:21,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5685685685685685 [2024-11-17 03:34:21,168 INFO L175 Difference]: Start difference. First operand has 129 places, 121 transitions, 497 flow. Second operand 9 states and 568 transitions. [2024-11-17 03:34:21,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 220 transitions, 1187 flow [2024-11-17 03:34:21,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 220 transitions, 1175 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:34:21,287 INFO L231 Difference]: Finished difference. Result has 135 places, 130 transitions, 605 flow [2024-11-17 03:34:21,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=605, PETRI_PLACES=135, PETRI_TRANSITIONS=130} [2024-11-17 03:34:21,288 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 36 predicate places. [2024-11-17 03:34:21,288 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 130 transitions, 605 flow [2024-11-17 03:34:21,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:21,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:21,289 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] [2024-11-17 03:34:21,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:34:21,489 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 [2024-11-17 03:34:21,489 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:21,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:21,490 INFO L85 PathProgramCache]: Analyzing trace with hash -941586172, now seen corresponding path program 1 times [2024-11-17 03:34:21,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:21,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037660807] [2024-11-17 03:34:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:21,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037660807] [2024-11-17 03:34:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037660807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:21,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:21,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:34:21,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186531239] [2024-11-17 03:34:21,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:21,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:34:21,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:34:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:34:21,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 111 [2024-11-17 03:34:21,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 130 transitions, 605 flow. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:21,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:21,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 111 [2024-11-17 03:34:21,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:23,711 INFO L124 PetriNetUnfolderBase]: 14670/27544 cut-off events. [2024-11-17 03:34:23,711 INFO L125 PetriNetUnfolderBase]: For 31566/32386 co-relation queries the response was YES. [2024-11-17 03:34:23,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65043 conditions, 27544 events. 14670/27544 cut-off events. For 31566/32386 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 236293 event pairs, 10017 based on Foata normal form. 4/24437 useless extension candidates. Maximal degree in co-relation 47592. Up to 19886 conditions per place. [2024-11-17 03:34:23,938 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 75 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2024-11-17 03:34:23,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 126 transitions, 767 flow [2024-11-17 03:34:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:34:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:34:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 296 transitions. [2024-11-17 03:34:23,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-17 03:34:23,940 INFO L175 Difference]: Start difference. First operand has 135 places, 130 transitions, 605 flow. Second operand 5 states and 296 transitions. [2024-11-17 03:34:23,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 126 transitions, 767 flow [2024-11-17 03:34:24,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 126 transitions, 751 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-17 03:34:24,031 INFO L231 Difference]: Finished difference. Result has 133 places, 126 transitions, 601 flow [2024-11-17 03:34:24,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=133, PETRI_TRANSITIONS=126} [2024-11-17 03:34:24,032 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 34 predicate places. [2024-11-17 03:34:24,032 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 126 transitions, 601 flow [2024-11-17 03:34:24,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:24,032 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:24,033 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] [2024-11-17 03:34:24,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-17 03:34:24,033 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:24,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash -941586171, now seen corresponding path program 1 times [2024-11-17 03:34:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:24,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089795465] [2024-11-17 03:34:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:24,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:24,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089795465] [2024-11-17 03:34:24,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089795465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:24,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176079206] [2024-11-17 03:34:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:24,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:24,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:24,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:34:24,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:34:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:24,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:34:24,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:24,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:34:24,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:34:24,471 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 [2024-11-17 03:34:24,479 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:34:24,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:34:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:24,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:34:24,679 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 [2024-11-17 03:34:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:24,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176079206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:34:24,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:34:24,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-17 03:34:24,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815075616] [2024-11-17 03:34:24,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:34:24,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:34:24,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:24,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:34:24,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:34:29,358 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] [2024-11-17 03:34:29,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-17 03:34:29,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 126 transitions, 601 flow. Second operand has 13 states, 13 states have (on average 55.07692307692308) internal successors, (716), 13 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:29,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:29,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-17 03:34:29,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:31,792 INFO L124 PetriNetUnfolderBase]: 12812/23627 cut-off events. [2024-11-17 03:34:31,793 INFO L125 PetriNetUnfolderBase]: For 24016/24900 co-relation queries the response was YES. [2024-11-17 03:34:31,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55097 conditions, 23627 events. 12812/23627 cut-off events. For 24016/24900 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 196496 event pairs, 5877 based on Foata normal form. 94/20811 useless extension candidates. Maximal degree in co-relation 39990. Up to 7209 conditions per place. [2024-11-17 03:34:31,975 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 146 selfloop transitions, 30 changer transitions 0/217 dead transitions. [2024-11-17 03:34:31,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 217 transitions, 1317 flow [2024-11-17 03:34:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:34:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:34:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2024-11-17 03:34:31,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6176176176176176 [2024-11-17 03:34:31,980 INFO L175 Difference]: Start difference. First operand has 133 places, 126 transitions, 601 flow. Second operand 9 states and 617 transitions. [2024-11-17 03:34:31,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 217 transitions, 1317 flow [2024-11-17 03:34:32,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 217 transitions, 1297 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:34:32,090 INFO L231 Difference]: Finished difference. Result has 139 places, 132 transitions, 716 flow [2024-11-17 03:34:32,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=716, PETRI_PLACES=139, PETRI_TRANSITIONS=132} [2024-11-17 03:34:32,091 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 40 predicate places. [2024-11-17 03:34:32,092 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 132 transitions, 716 flow [2024-11-17 03:34:32,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 55.07692307692308) internal successors, (716), 13 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:32,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:32,094 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, 1] [2024-11-17 03:34:32,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:34:32,294 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,SelfDestructingSolverStorable15 [2024-11-17 03:34:32,294 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:32,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:32,295 INFO L85 PathProgramCache]: Analyzing trace with hash 866760065, now seen corresponding path program 1 times [2024-11-17 03:34:32,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:32,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248214118] [2024-11-17 03:34:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:32,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:32,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:32,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248214118] [2024-11-17 03:34:32,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248214118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:32,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:32,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:34:32,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843498690] [2024-11-17 03:34:32,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:32,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:34:32,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:34:32,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:34:32,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-17 03:34:32,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 132 transitions, 716 flow. Second operand has 5 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:32,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:32,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-17 03:34:32,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:34,118 INFO L124 PetriNetUnfolderBase]: 10896/20364 cut-off events. [2024-11-17 03:34:34,118 INFO L125 PetriNetUnfolderBase]: For 31851/32411 co-relation queries the response was YES. [2024-11-17 03:34:34,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51255 conditions, 20364 events. 10896/20364 cut-off events. For 31851/32411 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 164931 event pairs, 6837 based on Foata normal form. 180/18369 useless extension candidates. Maximal degree in co-relation 38368. Up to 9281 conditions per place. [2024-11-17 03:34:34,257 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 141 selfloop transitions, 18 changer transitions 0/196 dead transitions. [2024-11-17 03:34:34,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 196 transitions, 1406 flow [2024-11-17 03:34:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:34:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:34:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2024-11-17 03:34:34,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6411411411411412 [2024-11-17 03:34:34,417 INFO L175 Difference]: Start difference. First operand has 139 places, 132 transitions, 716 flow. Second operand 6 states and 427 transitions. [2024-11-17 03:34:34,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 196 transitions, 1406 flow [2024-11-17 03:34:34,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 196 transitions, 1369 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-17 03:34:34,481 INFO L231 Difference]: Finished difference. Result has 143 places, 136 transitions, 777 flow [2024-11-17 03:34:34,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=777, PETRI_PLACES=143, PETRI_TRANSITIONS=136} [2024-11-17 03:34:34,481 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 44 predicate places. [2024-11-17 03:34:34,482 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 136 transitions, 777 flow [2024-11-17 03:34:34,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:34,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:34,482 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] [2024-11-17 03:34:34,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:34:34,482 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:34,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash -240143308, now seen corresponding path program 1 times [2024-11-17 03:34:34,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:34,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401480923] [2024-11-17 03:34:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:34,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:34:34,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:34,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401480923] [2024-11-17 03:34:34,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401480923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:34,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368223205] [2024-11-17 03:34:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:34,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:34,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:34,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:34:34,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:34:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:34,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:34:34,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:34,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:34:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:34:34,998 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 [2024-11-17 03:34:35,012 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-17 03:34:35,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-17 03:34:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:34:35,042 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 [2024-11-17 03:34:35,048 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:34:35,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:34:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:35,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:34:35,402 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 [2024-11-17 03:34:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:35,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368223205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:34:35,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:34:35,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2024-11-17 03:34:35,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801776659] [2024-11-17 03:34:35,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:34:35,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:34:35,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:35,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:34:35,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:34:37,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2024-11-17 03:34:37,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 136 transitions, 777 flow. Second operand has 17 states, 17 states have (on average 48.11764705882353) internal successors, (818), 17 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:37,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:37,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2024-11-17 03:34:37,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:40,249 INFO L124 PetriNetUnfolderBase]: 19118/33880 cut-off events. [2024-11-17 03:34:40,249 INFO L125 PetriNetUnfolderBase]: For 52791/55017 co-relation queries the response was YES. [2024-11-17 03:34:40,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84975 conditions, 33880 events. 19118/33880 cut-off events. For 52791/55017 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 275610 event pairs, 7763 based on Foata normal form. 0/29296 useless extension candidates. Maximal degree in co-relation 68578. Up to 10758 conditions per place. [2024-11-17 03:34:40,704 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 178 selfloop transitions, 30 changer transitions 0/245 dead transitions. [2024-11-17 03:34:40,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 245 transitions, 1699 flow [2024-11-17 03:34:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:34:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:34:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 566 transitions. [2024-11-17 03:34:40,706 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5665665665665666 [2024-11-17 03:34:40,706 INFO L175 Difference]: Start difference. First operand has 143 places, 136 transitions, 777 flow. Second operand 9 states and 566 transitions. [2024-11-17 03:34:40,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 245 transitions, 1699 flow [2024-11-17 03:34:40,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 245 transitions, 1673 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:34:40,869 INFO L231 Difference]: Finished difference. Result has 149 places, 139 transitions, 850 flow [2024-11-17 03:34:40,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=850, PETRI_PLACES=149, PETRI_TRANSITIONS=139} [2024-11-17 03:34:40,870 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 50 predicate places. [2024-11-17 03:34:40,870 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 139 transitions, 850 flow [2024-11-17 03:34:40,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 48.11764705882353) internal successors, (818), 17 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:40,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:40,870 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] [2024-11-17 03:34:40,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:34:41,071 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 [2024-11-17 03:34:41,071 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:41,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1145492728, now seen corresponding path program 1 times [2024-11-17 03:34:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:41,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903419162] [2024-11-17 03:34:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:41,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:41,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:41,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903419162] [2024-11-17 03:34:41,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903419162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:41,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:41,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:34:41,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18611806] [2024-11-17 03:34:41,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:41,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:34:41,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:41,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:34:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:34:41,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 111 [2024-11-17 03:34:41,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 139 transitions, 850 flow. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:41,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:41,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 111 [2024-11-17 03:34:41,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:43,552 INFO L124 PetriNetUnfolderBase]: 14882/27443 cut-off events. [2024-11-17 03:34:43,553 INFO L125 PetriNetUnfolderBase]: For 55490/57464 co-relation queries the response was YES. [2024-11-17 03:34:43,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73620 conditions, 27443 events. 14882/27443 cut-off events. For 55490/57464 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 226013 event pairs, 10009 based on Foata normal form. 155/26150 useless extension candidates. Maximal degree in co-relation 56848. Up to 20071 conditions per place. [2024-11-17 03:34:43,751 INFO L140 encePairwiseOnDemand]: 105/111 looper letters, 88 selfloop transitions, 9 changer transitions 0/135 dead transitions. [2024-11-17 03:34:43,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 135 transitions, 1036 flow [2024-11-17 03:34:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:34:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:34:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 250 transitions. [2024-11-17 03:34:43,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5630630630630631 [2024-11-17 03:34:43,753 INFO L175 Difference]: Start difference. First operand has 149 places, 139 transitions, 850 flow. Second operand 4 states and 250 transitions. [2024-11-17 03:34:43,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 135 transitions, 1036 flow [2024-11-17 03:34:43,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 135 transitions, 983 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-17 03:34:43,867 INFO L231 Difference]: Finished difference. Result has 142 places, 135 transitions, 807 flow [2024-11-17 03:34:43,867 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=807, PETRI_PLACES=142, PETRI_TRANSITIONS=135} [2024-11-17 03:34:43,867 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 43 predicate places. [2024-11-17 03:34:43,867 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 135 transitions, 807 flow [2024-11-17 03:34:43,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:43,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:43,868 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] [2024-11-17 03:34:43,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-17 03:34:43,868 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:43,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:43,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1145492729, now seen corresponding path program 1 times [2024-11-17 03:34:43,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:43,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714524616] [2024-11-17 03:34:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:43,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:44,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714524616] [2024-11-17 03:34:44,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714524616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168407542] [2024-11-17 03:34:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:44,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:44,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:44,015 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:34:44,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:34:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:44,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:34:44,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:44,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:34:44,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:34:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:44,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168407542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:34:44,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:34:44,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-17 03:34:44,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030609727] [2024-11-17 03:34:44,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:34:44,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:34:44,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:34:44,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:34:44,618 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-17 03:34:44,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 135 transitions, 807 flow. Second operand has 11 states, 11 states have (on average 58.36363636363637) internal successors, (642), 11 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:44,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:44,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-17 03:34:44,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:46,948 INFO L124 PetriNetUnfolderBase]: 14439/25531 cut-off events. [2024-11-17 03:34:46,948 INFO L125 PetriNetUnfolderBase]: For 47814/49440 co-relation queries the response was YES. [2024-11-17 03:34:47,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68832 conditions, 25531 events. 14439/25531 cut-off events. For 47814/49440 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 198491 event pairs, 6509 based on Foata normal form. 172/24215 useless extension candidates. Maximal degree in co-relation 52718. Up to 7688 conditions per place. [2024-11-17 03:34:47,144 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 161 selfloop transitions, 30 changer transitions 0/228 dead transitions. [2024-11-17 03:34:47,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 228 transitions, 1661 flow [2024-11-17 03:34:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:34:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:34:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 524 transitions. [2024-11-17 03:34:47,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6743886743886743 [2024-11-17 03:34:47,146 INFO L175 Difference]: Start difference. First operand has 142 places, 135 transitions, 807 flow. Second operand 7 states and 524 transitions. [2024-11-17 03:34:47,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 228 transitions, 1661 flow [2024-11-17 03:34:47,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 228 transitions, 1651 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:34:47,273 INFO L231 Difference]: Finished difference. Result has 147 places, 135 transitions, 878 flow [2024-11-17 03:34:47,275 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=878, PETRI_PLACES=147, PETRI_TRANSITIONS=135} [2024-11-17 03:34:47,276 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 48 predicate places. [2024-11-17 03:34:47,276 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 135 transitions, 878 flow [2024-11-17 03:34:47,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 58.36363636363637) internal successors, (642), 11 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:47,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:47,277 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] [2024-11-17 03:34:47,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-17 03:34:47,481 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 [2024-11-17 03:34:47,482 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-17 03:34:47,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1977321866, now seen corresponding path program 1 times [2024-11-17 03:34:47,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:47,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165931174] [2024-11-17 03:34:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:47,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:47,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:47,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165931174] [2024-11-17 03:34:47,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165931174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:47,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997195018] [2024-11-17 03:34:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:47,729 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:34:47,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:34:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:47,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:34:47,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:47,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:34:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:34:47,892 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 [2024-11-17 03:34:47,900 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:34:47,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:34:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:47,984 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:34:48,129 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 [2024-11-17 03:34:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:34:48,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997195018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:34:48,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:34:48,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-17 03:34:48,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566094974] [2024-11-17 03:34:48,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:34:48,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:34:48,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:34:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:34:52,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:34:56,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:35:00,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:35:04,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:35:08,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:35:12,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:35:16,750 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]