./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i -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 bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:39:41,777 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:39:41,857 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:39:41,863 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:39:41,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:39:41,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:39:41,902 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:39:41,903 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:39:41,904 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:39:41,905 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:39:41,905 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:39:41,905 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:39:41,906 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:39:41,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:39:41,908 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:39:41,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:39:41,909 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:39:41,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:39:41,909 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:39:41,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:39:41,910 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:39:41,911 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:39:41,912 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:39:41,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:39:41,912 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:39:41,913 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:39:41,913 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:39:41,913 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:39:41,914 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:39:41,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:39:41,914 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:39:41,915 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:39:41,915 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:39:41,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:39:41,916 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:39:41,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:39:41,916 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:39:41,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:39:41,917 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:39:41,918 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:39:41,918 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:39:41,918 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:39:41,918 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa [2024-11-09 10:39:42,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:39:42,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:39:42,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:39:42,176 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:39:42,176 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:39:42,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2024-11-09 10:39:43,690 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:39:43,961 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:39:43,962 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2024-11-09 10:39:43,987 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7774f6ebf/1f704342fca6435ab4b7617300c43268/FLAGea8d1d2db [2024-11-09 10:39:44,001 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7774f6ebf/1f704342fca6435ab4b7617300c43268 [2024-11-09 10:39:44,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:39:44,005 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:39:44,006 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:39:44,007 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:39:44,014 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:39:44,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:44,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73af4969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44, skipping insertion in model container [2024-11-09 10:39:44,016 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:44,066 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:39:44,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:39:44,694 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:39:44,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:39:44,899 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:39:44,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44 WrapperNode [2024-11-09 10:39:44,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:39:44,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:39:44,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:39:44,902 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:39:44,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:44,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:44,969 INFO L138 Inliner]: procedures = 372, calls = 43, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 133 [2024-11-09 10:39:44,973 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:39:44,974 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:39:44,974 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:39:44,975 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:39:44,985 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:44,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:44,996 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:45,029 INFO L175 MemorySlicer]: Split 33 memory accesses to 3 slices as follows [5, 14, 14]. 42 percent of accesses are in the largest equivalence class. The 15 initializations are split as follows [5, 0, 10]. The 11 writes are split as follows [0, 10, 1]. [2024-11-09 10:39:45,033 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:45,034 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:45,045 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:45,052 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:45,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:45,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:45,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:39:45,066 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:39:45,066 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:39:45,066 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:39:45,067 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2024-11-09 10:39:45,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:39:45,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:45,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:39:45,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:39:45,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-09 10:39:45,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-09 10:39:45,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-09 10:39:45,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-09 10:39:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-09 10:39:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-09 10:39:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 10:39:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:39:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:39:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 10:39:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:39:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:39:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 10:39:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 10:39:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:39:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:39:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-09 10:39:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-09 10:39:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-09 10:39:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-09 10:39:45,163 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-09 10:39:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:39:45,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:39:45,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 10:39:45,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:39:45,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:39:45,167 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:39:45,330 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:39:45,332 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:39:45,680 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:39:45,681 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:39:45,927 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:39:45,927 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 10:39:45,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:45 BoogieIcfgContainer [2024-11-09 10:39:45,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:39:45,932 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:39:45,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:39:45,935 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:39:45,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:39:44" (1/3) ... [2024-11-09 10:39:45,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4859b3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:45, skipping insertion in model container [2024-11-09 10:39:45,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (2/3) ... [2024-11-09 10:39:45,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4859b3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:45, skipping insertion in model container [2024-11-09 10:39:45,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:45" (3/3) ... [2024-11-09 10:39:45,938 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_09-arraylist.i [2024-11-09 10:39:45,956 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:39:45,957 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-09 10:39:45,957 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:39:46,029 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 10:39:46,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 71 transitions, 146 flow [2024-11-09 10:39:46,113 INFO L124 PetriNetUnfolderBase]: 1/70 cut-off events. [2024-11-09 10:39:46,113 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:46,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 70 events. 1/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 289 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-11-09 10:39:46,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 71 transitions, 146 flow [2024-11-09 10:39:46,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 143 flow [2024-11-09 10:39:46,133 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:39:46,141 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;@1e11dc66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:39:46,141 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-09 10:39:46,144 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:39:46,145 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-09 10:39:46,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:46,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:46,146 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:39:46,147 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:46,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:46,152 INFO L85 PathProgramCache]: Analyzing trace with hash 410590, now seen corresponding path program 1 times [2024-11-09 10:39:46,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:46,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851783268] [2024-11-09 10:39:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:46,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:46,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:46,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851783268] [2024-11-09 10:39:46,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851783268] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:46,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:46,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:39:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110025220] [2024-11-09 10:39:46,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:46,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:39:46,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:39:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:39:46,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 71 [2024-11-09 10:39:46,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:46,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:46,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 71 [2024-11-09 10:39:46,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:46,794 INFO L124 PetriNetUnfolderBase]: 64/262 cut-off events. [2024-11-09 10:39:46,795 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:46,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 262 events. 64/262 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1355 event pairs, 63 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 377. Up to 151 conditions per place. [2024-11-09 10:39:46,802 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 24 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-09 10:39:46,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 191 flow [2024-11-09 10:39:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:39:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:39:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-11-09 10:39:46,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6995305164319249 [2024-11-09 10:39:46,817 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 143 flow. Second operand 3 states and 149 transitions. [2024-11-09 10:39:46,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 191 flow [2024-11-09 10:39:46,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:39:46,828 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 142 flow [2024-11-09 10:39:46,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-11-09 10:39:46,834 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2024-11-09 10:39:46,834 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 142 flow [2024-11-09 10:39:46,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:46,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:46,835 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:39:46,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:39:46,837 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:46,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash 410591, now seen corresponding path program 1 times [2024-11-09 10:39:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:46,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849127096] [2024-11-09 10:39:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:46,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:46,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:46,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849127096] [2024-11-09 10:39:46,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849127096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:46,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:46,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:39:46,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143784431] [2024-11-09 10:39:46,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:46,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:39:46,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:39:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:39:47,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 71 [2024-11-09 10:39:47,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:47,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:47,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 71 [2024-11-09 10:39:47,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:47,180 INFO L124 PetriNetUnfolderBase]: 64/258 cut-off events. [2024-11-09 10:39:47,181 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:39:47,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 258 events. 64/258 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1336 event pairs, 63 based on Foata normal form. 4/207 useless extension candidates. Maximal degree in co-relation 385. Up to 151 conditions per place. [2024-11-09 10:39:47,186 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 22 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-09 10:39:47,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 186 flow [2024-11-09 10:39:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:39:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:39:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2024-11-09 10:39:47,190 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7183098591549296 [2024-11-09 10:39:47,190 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 142 flow. Second operand 3 states and 153 transitions. [2024-11-09 10:39:47,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 186 flow [2024-11-09 10:39:47,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:39:47,192 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 134 flow [2024-11-09 10:39:47,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-11-09 10:39:47,193 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2024-11-09 10:39:47,193 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 134 flow [2024-11-09 10:39:47,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:47,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:47,194 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:39:47,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:39:47,194 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:47,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash 394588513, now seen corresponding path program 1 times [2024-11-09 10:39:47,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:47,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950998673] [2024-11-09 10:39:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:47,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:47,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:47,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950998673] [2024-11-09 10:39:47,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950998673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:47,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:47,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:39:47,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670418309] [2024-11-09 10:39:47,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:47,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:39:47,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:39:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:39:47,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 71 [2024-11-09 10:39:47,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 38.833333333333336) internal successors, (233), 6 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:47,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:47,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 71 [2024-11-09 10:39:47,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:47,734 INFO L124 PetriNetUnfolderBase]: 73/276 cut-off events. [2024-11-09 10:39:47,734 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:47,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 276 events. 73/276 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1419 event pairs, 72 based on Foata normal form. 1/228 useless extension candidates. Maximal degree in co-relation 424. Up to 173 conditions per place. [2024-11-09 10:39:47,736 INFO L140 encePairwiseOnDemand]: 66/71 looper letters, 28 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2024-11-09 10:39:47,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 184 flow [2024-11-09 10:39:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:39:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:39:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-11-09 10:39:47,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6901408450704225 [2024-11-09 10:39:47,738 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 134 flow. Second operand 3 states and 147 transitions. [2024-11-09 10:39:47,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 184 flow [2024-11-09 10:39:47,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:39:47,740 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 120 flow [2024-11-09 10:39:47,740 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-11-09 10:39:47,741 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -11 predicate places. [2024-11-09 10:39:47,741 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 120 flow [2024-11-09 10:39:47,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.833333333333336) internal successors, (233), 6 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:47,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:47,741 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:39:47,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:39:47,742 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:47,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:47,742 INFO L85 PathProgramCache]: Analyzing trace with hash 394588514, now seen corresponding path program 1 times [2024-11-09 10:39:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:47,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950694693] [2024-11-09 10:39:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:47,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:47,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950694693] [2024-11-09 10:39:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950694693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:47,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:47,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:39:47,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436055822] [2024-11-09 10:39:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:47,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:39:47,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:39:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:39:48,073 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 71 [2024-11-09 10:39:48,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:48,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:48,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 71 [2024-11-09 10:39:48,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:48,217 INFO L124 PetriNetUnfolderBase]: 65/266 cut-off events. [2024-11-09 10:39:48,218 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:48,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 266 events. 65/266 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1373 event pairs, 63 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 428. Up to 156 conditions per place. [2024-11-09 10:39:48,222 INFO L140 encePairwiseOnDemand]: 62/71 looper letters, 29 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-09 10:39:48,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 208 flow [2024-11-09 10:39:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:39:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:39:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2024-11-09 10:39:48,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6267605633802817 [2024-11-09 10:39:48,224 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 120 flow. Second operand 4 states and 178 transitions. [2024-11-09 10:39:48,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 208 flow [2024-11-09 10:39:48,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:39:48,230 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 172 flow [2024-11-09 10:39:48,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-11-09 10:39:48,231 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2024-11-09 10:39:48,231 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 172 flow [2024-11-09 10:39:48,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:48,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:48,231 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:48,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:39:48,233 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:48,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1298229275, now seen corresponding path program 1 times [2024-11-09 10:39:48,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:48,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726527164] [2024-11-09 10:39:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:48,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:48,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:48,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726527164] [2024-11-09 10:39:48,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726527164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:48,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:48,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:39:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687625335] [2024-11-09 10:39:48,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:48,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:39:48,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:39:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:39:48,277 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2024-11-09 10:39:48,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:48,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:48,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2024-11-09 10:39:48,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:48,374 INFO L124 PetriNetUnfolderBase]: 64/265 cut-off events. [2024-11-09 10:39:48,374 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-09 10:39:48,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 265 events. 64/265 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1252 event pairs, 63 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 442. Up to 153 conditions per place. [2024-11-09 10:39:48,377 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 31 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-11-09 10:39:48,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 65 transitions, 237 flow [2024-11-09 10:39:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:39:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:39:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2024-11-09 10:39:48,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7934272300469484 [2024-11-09 10:39:48,379 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 172 flow. Second operand 3 states and 169 transitions. [2024-11-09 10:39:48,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 65 transitions, 237 flow [2024-11-09 10:39:48,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 235 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:39:48,381 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 169 flow [2024-11-09 10:39:48,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-11-09 10:39:48,384 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2024-11-09 10:39:48,385 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 169 flow [2024-11-09 10:39:48,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:48,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:48,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:48,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:39:48,387 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:48,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:48,387 INFO L85 PathProgramCache]: Analyzing trace with hash -3562606, now seen corresponding path program 1 times [2024-11-09 10:39:48,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:48,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738651376] [2024-11-09 10:39:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:48,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:48,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:48,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738651376] [2024-11-09 10:39:48,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738651376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:48,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:48,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:39:48,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789174768] [2024-11-09 10:39:48,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:48,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:39:48,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:48,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:39:48,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:39:48,938 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 71 [2024-11-09 10:39:48,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 169 flow. Second operand has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:48,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:48,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 71 [2024-11-09 10:39:48,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:49,121 INFO L124 PetriNetUnfolderBase]: 64/261 cut-off events. [2024-11-09 10:39:49,121 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:39:49,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 261 events. 64/261 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1231 event pairs, 63 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 444. Up to 148 conditions per place. [2024-11-09 10:39:49,125 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 23 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-11-09 10:39:49,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 233 flow [2024-11-09 10:39:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:39:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:39:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 283 transitions. [2024-11-09 10:39:49,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5694164989939637 [2024-11-09 10:39:49,127 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 169 flow. Second operand 7 states and 283 transitions. [2024-11-09 10:39:49,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 233 flow [2024-11-09 10:39:49,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 229 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:39:49,131 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 183 flow [2024-11-09 10:39:49,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=183, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2024-11-09 10:39:49,133 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -4 predicate places. [2024-11-09 10:39:49,133 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 183 flow [2024-11-09 10:39:49,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:49,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:49,134 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:49,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:39:49,134 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:49,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:49,135 INFO L85 PathProgramCache]: Analyzing trace with hash -3562605, now seen corresponding path program 1 times [2024-11-09 10:39:49,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:49,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778291762] [2024-11-09 10:39:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:49,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:49,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:49,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778291762] [2024-11-09 10:39:49,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778291762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:49,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:49,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:39:49,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622613326] [2024-11-09 10:39:49,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:49,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:39:49,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:39:49,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:39:49,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 71 [2024-11-09 10:39:49,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:49,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:49,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 71 [2024-11-09 10:39:49,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:49,843 INFO L124 PetriNetUnfolderBase]: 64/257 cut-off events. [2024-11-09 10:39:49,843 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-09 10:39:49,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 257 events. 64/257 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1206 event pairs, 63 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 445. Up to 148 conditions per place. [2024-11-09 10:39:49,845 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 20 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-11-09 10:39:49,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 59 transitions, 241 flow [2024-11-09 10:39:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:39:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:39:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 301 transitions. [2024-11-09 10:39:49,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6056338028169014 [2024-11-09 10:39:49,847 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 183 flow. Second operand 7 states and 301 transitions. [2024-11-09 10:39:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 59 transitions, 241 flow [2024-11-09 10:39:49,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 59 transitions, 219 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:39:49,849 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 179 flow [2024-11-09 10:39:49,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=179, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-11-09 10:39:49,851 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2024-11-09 10:39:49,851 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 179 flow [2024-11-09 10:39:49,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:49,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:49,852 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:49,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:39:49,852 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:49,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash 871318099, now seen corresponding path program 1 times [2024-11-09 10:39:49,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:49,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591081310] [2024-11-09 10:39:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:50,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:50,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591081310] [2024-11-09 10:39:50,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591081310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:50,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:50,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:39:50,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546924738] [2024-11-09 10:39:50,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:50,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:39:50,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:50,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:39:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:39:50,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 71 [2024-11-09 10:39:50,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 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) [2024-11-09 10:39:50,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:50,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 71 [2024-11-09 10:39:50,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:50,298 INFO L124 PetriNetUnfolderBase]: 64/255 cut-off events. [2024-11-09 10:39:50,298 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-09 10:39:50,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 255 events. 64/255 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1186 event pairs, 63 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 443. Up to 150 conditions per place. [2024-11-09 10:39:50,299 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 20 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-11-09 10:39:50,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 239 flow [2024-11-09 10:39:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:39:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:39:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2024-11-09 10:39:50,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6394366197183099 [2024-11-09 10:39:50,304 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 179 flow. Second operand 5 states and 227 transitions. [2024-11-09 10:39:50,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 239 flow [2024-11-09 10:39:50,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 217 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:39:50,306 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 177 flow [2024-11-09 10:39:50,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-11-09 10:39:50,307 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2024-11-09 10:39:50,307 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 177 flow [2024-11-09 10:39:50,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 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) [2024-11-09 10:39:50,307 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:50,307 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:50,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:39:50,308 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:50,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash 871318098, now seen corresponding path program 1 times [2024-11-09 10:39:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851147275] [2024-11-09 10:39:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:50,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851147275] [2024-11-09 10:39:50,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851147275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:50,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:50,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:39:50,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953429972] [2024-11-09 10:39:50,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:50,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:39:50,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:50,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:39:50,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:39:50,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 71 [2024-11-09 10:39:50,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:50,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:50,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 71 [2024-11-09 10:39:50,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:50,640 INFO L124 PetriNetUnfolderBase]: 64/253 cut-off events. [2024-11-09 10:39:50,640 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-09 10:39:50,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 253 events. 64/253 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1183 event pairs, 63 based on Foata normal form. 2/213 useless extension candidates. Maximal degree in co-relation 445. Up to 150 conditions per place. [2024-11-09 10:39:50,642 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 22 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-11-09 10:39:50,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 241 flow [2024-11-09 10:39:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:39:50,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:39:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-11-09 10:39:50,643 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6169014084507042 [2024-11-09 10:39:50,644 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 177 flow. Second operand 5 states and 219 transitions. [2024-11-09 10:39:50,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 241 flow [2024-11-09 10:39:50,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 219 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:39:50,645 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 175 flow [2024-11-09 10:39:50,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-11-09 10:39:50,646 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2024-11-09 10:39:50,646 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 175 flow [2024-11-09 10:39:50,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:50,647 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:50,647 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:50,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:39:50,647 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:50,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:50,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1271582615, now seen corresponding path program 1 times [2024-11-09 10:39:50,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:50,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680391703] [2024-11-09 10:39:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:50,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:50,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:50,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680391703] [2024-11-09 10:39:50,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680391703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:50,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908648998] [2024-11-09 10:39:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:50,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:50,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:50,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:39:50,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:39:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:51,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 10:39:51,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:51,266 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:39:51,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:39:51,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:51,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:39:51,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:51,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:39:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:39:51,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:51,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:51,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:39:51,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 10:39:51,962 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:39:51,962 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 13 treesize of output 12 [2024-11-09 10:39:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:52,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908648998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:52,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:52,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2024-11-09 10:39:52,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848215291] [2024-11-09 10:39:52,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:52,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:39:52,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:39:52,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:39:54,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-11-09 10:39:54,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 175 flow. Second operand has 18 states, 18 states have (on average 35.833333333333336) internal successors, (645), 18 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:54,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:54,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-11-09 10:39:54,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:54,768 INFO L124 PetriNetUnfolderBase]: 75/305 cut-off events. [2024-11-09 10:39:54,769 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-11-09 10:39:54,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 305 events. 75/305 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1437 event pairs, 72 based on Foata normal form. 7/267 useless extension candidates. Maximal degree in co-relation 561. Up to 170 conditions per place. [2024-11-09 10:39:54,771 INFO L140 encePairwiseOnDemand]: 62/71 looper letters, 38 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-11-09 10:39:54,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 383 flow [2024-11-09 10:39:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:39:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:39:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 367 transitions. [2024-11-09 10:39:54,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5743348982785602 [2024-11-09 10:39:54,773 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 175 flow. Second operand 9 states and 367 transitions. [2024-11-09 10:39:54,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 383 flow [2024-11-09 10:39:54,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 77 transitions, 329 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:39:54,778 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 257 flow [2024-11-09 10:39:54,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=257, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-11-09 10:39:54,779 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2024-11-09 10:39:54,779 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 257 flow [2024-11-09 10:39:54,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 35.833333333333336) internal successors, (645), 18 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:54,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:54,781 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:54,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:39:54,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 10:39:54,982 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:54,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2100413382, now seen corresponding path program 1 times [2024-11-09 10:39:54,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:54,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297212923] [2024-11-09 10:39:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:54,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:55,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:55,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297212923] [2024-11-09 10:39:55,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297212923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:55,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809080661] [2024-11-09 10:39:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:55,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:55,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:55,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:39:55,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:39:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:55,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 10:39:55,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:55,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:55,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809080661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:55,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:55,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 10:39:55,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621718658] [2024-11-09 10:39:55,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:55,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:39:55,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:55,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:39:55,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:39:55,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2024-11-09 10:39:55,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 257 flow. Second operand has 8 states, 8 states have (on average 49.5) internal successors, (396), 8 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:55,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:55,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2024-11-09 10:39:55,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:55,613 INFO L124 PetriNetUnfolderBase]: 64/294 cut-off events. [2024-11-09 10:39:55,613 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-11-09 10:39:55,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 294 events. 64/294 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1117 event pairs, 63 based on Foata normal form. 4/256 useless extension candidates. Maximal degree in co-relation 571. Up to 146 conditions per place. [2024-11-09 10:39:55,615 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 54 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-11-09 10:39:55,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 87 transitions, 477 flow [2024-11-09 10:39:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:39:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:39:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 426 transitions. [2024-11-09 10:39:55,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-09 10:39:55,617 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 257 flow. Second operand 8 states and 426 transitions. [2024-11-09 10:39:55,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 87 transitions, 477 flow [2024-11-09 10:39:55,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 457 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-09 10:39:55,622 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 273 flow [2024-11-09 10:39:55,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=273, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2024-11-09 10:39:55,623 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 6 predicate places. [2024-11-09 10:39:55,623 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 273 flow [2024-11-09 10:39:55,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 49.5) internal successors, (396), 8 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:55,624 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:55,624 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-11-09 10:39:55,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:39:55,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 10:39:55,825 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:55,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:55,825 INFO L85 PathProgramCache]: Analyzing trace with hash -740248394, now seen corresponding path program 2 times [2024-11-09 10:39:55,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:55,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718123103] [2024-11-09 10:39:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:55,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:57,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:57,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718123103] [2024-11-09 10:39:57,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718123103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:57,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658706218] [2024-11-09 10:39:57,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:39:57,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:57,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:57,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:39:57,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:39:58,063 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:39:58,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:39:58,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-09 10:39:58,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:58,124 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:39:58,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:39:58,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:58,234 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:39:58,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:39:58,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:39:58,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:39:58,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:58,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:39:58,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:39:58,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:58,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:39:58,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:58,795 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:39:58,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 10:39:58,810 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:39:58,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:39:58,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:39:58,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:39:58,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:59,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:39:59,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:39:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:59,068 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:59,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:39:59,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 10:39:59,389 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:39:59,390 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 13 treesize of output 12 [2024-11-09 10:39:59,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:39:59,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 10:39:59,714 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:39:59,715 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 13 treesize of output 12 [2024-11-09 10:39:59,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:39:59,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 10:40:00,040 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:40:00,040 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 13 treesize of output 12 [2024-11-09 10:40:00,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:40:00,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 10:40:00,380 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:40:00,380 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 13 treesize of output 12 [2024-11-09 10:40:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:40:00,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658706218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:40:00,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:40:00,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 10] total 43 [2024-11-09 10:40:00,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023323321] [2024-11-09 10:40:00,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:40:00,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 10:40:00,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:40:00,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 10:40:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1661, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 10:40:08,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-11-09 10:40:08,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 273 flow. Second operand has 45 states, 45 states have (on average 36.13333333333333) internal successors, (1626), 45 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:08,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:40:08,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-11-09 10:40:08,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:40:10,069 INFO L124 PetriNetUnfolderBase]: 77/367 cut-off events. [2024-11-09 10:40:10,069 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-11-09 10:40:10,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 805 conditions, 367 events. 77/367 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1433 event pairs, 72 based on Foata normal form. 6/328 useless extension candidates. Maximal degree in co-relation 786. Up to 172 conditions per place. [2024-11-09 10:40:10,071 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 74 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2024-11-09 10:40:10,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 121 transitions, 803 flow [2024-11-09 10:40:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 10:40:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-09 10:40:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 784 transitions. [2024-11-09 10:40:10,073 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5521126760563381 [2024-11-09 10:40:10,073 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 273 flow. Second operand 20 states and 784 transitions. [2024-11-09 10:40:10,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 121 transitions, 803 flow [2024-11-09 10:40:10,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 121 transitions, 787 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-09 10:40:10,079 INFO L231 Difference]: Finished difference. Result has 106 places, 79 transitions, 493 flow [2024-11-09 10:40:10,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=493, PETRI_PLACES=106, PETRI_TRANSITIONS=79} [2024-11-09 10:40:10,082 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 33 predicate places. [2024-11-09 10:40:10,082 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 79 transitions, 493 flow [2024-11-09 10:40:10,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 36.13333333333333) internal successors, (1626), 45 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:10,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:40:10,083 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:40:10,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:40:10,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:40:10,284 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:40:10,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:40:10,285 INFO L85 PathProgramCache]: Analyzing trace with hash -749760486, now seen corresponding path program 2 times [2024-11-09 10:40:10,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:40:10,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483516674] [2024-11-09 10:40:10,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:40:10,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:40:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:40:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:40:10,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:40:10,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483516674] [2024-11-09 10:40:10,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483516674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:40:10,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062576518] [2024-11-09 10:40:10,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:40:10,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:40:10,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:40:10,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:40:10,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:40:10,893 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:40:10,894 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:40:10,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 10:40:10,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:40:10,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:40:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-11-09 10:40:10,922 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:40:10,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062576518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:40:10,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:40:10,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2024-11-09 10:40:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913704410] [2024-11-09 10:40:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:40:10,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:40:10,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:40:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:40:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:40:10,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 71 [2024-11-09 10:40:10,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 79 transitions, 493 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:10,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:40:10,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 71 [2024-11-09 10:40:10,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:40:11,084 INFO L124 PetriNetUnfolderBase]: 68/343 cut-off events. [2024-11-09 10:40:11,084 INFO L125 PetriNetUnfolderBase]: For 466/466 co-relation queries the response was YES. [2024-11-09 10:40:11,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 343 events. 68/343 cut-off events. For 466/466 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1280 event pairs, 56 based on Foata normal form. 8/314 useless extension candidates. Maximal degree in co-relation 805. Up to 208 conditions per place. [2024-11-09 10:40:11,086 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 59 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2024-11-09 10:40:11,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 84 transitions, 625 flow [2024-11-09 10:40:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:40:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:40:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-11-09 10:40:11,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7699530516431925 [2024-11-09 10:40:11,088 INFO L175 Difference]: Start difference. First operand has 106 places, 79 transitions, 493 flow. Second operand 3 states and 164 transitions. [2024-11-09 10:40:11,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 84 transitions, 625 flow [2024-11-09 10:40:11,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 84 transitions, 571 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-11-09 10:40:11,093 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 439 flow [2024-11-09 10:40:11,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=439, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2024-11-09 10:40:11,094 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 25 predicate places. [2024-11-09 10:40:11,095 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 439 flow [2024-11-09 10:40:11,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:11,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:40:11,095 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:40:11,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:40:11,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:40:11,296 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:40:11,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:40:11,297 INFO L85 PathProgramCache]: Analyzing trace with hash -749760487, now seen corresponding path program 1 times [2024-11-09 10:40:11,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:40:11,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422933717] [2024-11-09 10:40:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:40:11,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:40:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:40:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-11-09 10:40:11,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:40:11,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422933717] [2024-11-09 10:40:11,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422933717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:40:11,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:40:11,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:40:11,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922895235] [2024-11-09 10:40:11,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:40:11,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:40:11,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:40:11,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:40:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:40:11,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 71 [2024-11-09 10:40:11,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 439 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:11,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:40:11,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 71 [2024-11-09 10:40:11,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:40:11,700 INFO L124 PetriNetUnfolderBase]: 75/334 cut-off events. [2024-11-09 10:40:11,701 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2024-11-09 10:40:11,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 334 events. 75/334 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1145 event pairs, 56 based on Foata normal form. 8/312 useless extension candidates. Maximal degree in co-relation 801. Up to 208 conditions per place. [2024-11-09 10:40:11,703 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 60 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-11-09 10:40:11,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 82 transitions, 573 flow [2024-11-09 10:40:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:40:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:40:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-11-09 10:40:11,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7605633802816901 [2024-11-09 10:40:11,704 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 439 flow. Second operand 3 states and 162 transitions. [2024-11-09 10:40:11,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 82 transitions, 573 flow [2024-11-09 10:40:11,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 557 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-09 10:40:11,708 INFO L231 Difference]: Finished difference. Result has 96 places, 75 transitions, 423 flow [2024-11-09 10:40:11,709 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=96, PETRI_TRANSITIONS=75} [2024-11-09 10:40:11,710 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 23 predicate places. [2024-11-09 10:40:11,710 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 75 transitions, 423 flow [2024-11-09 10:40:11,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:11,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:40:11,710 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:40:11,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:40:11,710 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:40:11,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:40:11,711 INFO L85 PathProgramCache]: Analyzing trace with hash -750788819, now seen corresponding path program 1 times [2024-11-09 10:40:11,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:40:11,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7909541] [2024-11-09 10:40:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:40:11,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:40:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:40:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:40:12,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:40:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7909541] [2024-11-09 10:40:12,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7909541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:40:12,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234394478] [2024-11-09 10:40:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:40:12,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:40:12,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:40:12,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:40:12,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:40:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:40:12,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:40:12,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:40:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:40:12,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:40:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:40:12,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234394478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:40:12,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:40:12,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-11-09 10:40:12,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203687576] [2024-11-09 10:40:12,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:40:12,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:40:12,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:40:12,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:40:12,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:40:12,633 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2024-11-09 10:40:12,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 75 transitions, 423 flow. Second operand has 12 states, 12 states have (on average 50.833333333333336) internal successors, (610), 12 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:12,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:40:12,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2024-11-09 10:40:12,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:40:12,851 INFO L124 PetriNetUnfolderBase]: 64/320 cut-off events. [2024-11-09 10:40:12,852 INFO L125 PetriNetUnfolderBase]: For 382/382 co-relation queries the response was YES. [2024-11-09 10:40:12,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 320 events. 64/320 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 974 event pairs, 63 based on Foata normal form. 4/294 useless extension candidates. Maximal degree in co-relation 742. Up to 146 conditions per place. [2024-11-09 10:40:12,854 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 79 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2024-11-09 10:40:12,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 112 transitions, 791 flow [2024-11-09 10:40:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:40:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:40:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 634 transitions. [2024-11-09 10:40:12,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.744131455399061 [2024-11-09 10:40:12,856 INFO L175 Difference]: Start difference. First operand has 96 places, 75 transitions, 423 flow. Second operand 12 states and 634 transitions. [2024-11-09 10:40:12,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 112 transitions, 791 flow [2024-11-09 10:40:12,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 112 transitions, 787 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:40:12,861 INFO L231 Difference]: Finished difference. Result has 106 places, 72 transitions, 408 flow [2024-11-09 10:40:12,861 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=408, PETRI_PLACES=106, PETRI_TRANSITIONS=72} [2024-11-09 10:40:12,862 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 33 predicate places. [2024-11-09 10:40:12,862 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 72 transitions, 408 flow [2024-11-09 10:40:12,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 50.833333333333336) internal successors, (610), 12 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:12,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:40:12,863 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-11-09 10:40:12,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:40:13,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:40:13,064 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:40:13,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:40:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash 200207924, now seen corresponding path program 3 times [2024-11-09 10:40:13,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:40:13,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999106259] [2024-11-09 10:40:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:40:13,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:40:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:40:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:40:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:40:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999106259] [2024-11-09 10:40:13,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999106259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:40:13,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:40:13,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-09 10:40:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292919375] [2024-11-09 10:40:13,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:40:13,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:40:13,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:40:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:40:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:40:13,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2024-11-09 10:40:13,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 72 transitions, 408 flow. Second operand has 13 states, 13 states have (on average 50.61538461538461) internal successors, (658), 13 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:13,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:40:13,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2024-11-09 10:40:13,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:40:14,024 INFO L124 PetriNetUnfolderBase]: 63/315 cut-off events. [2024-11-09 10:40:14,024 INFO L125 PetriNetUnfolderBase]: For 372/372 co-relation queries the response was YES. [2024-11-09 10:40:14,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 315 events. 63/315 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 959 event pairs, 63 based on Foata normal form. 1/286 useless extension candidates. Maximal degree in co-relation 711. Up to 145 conditions per place. [2024-11-09 10:40:14,026 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 77 selfloop transitions, 12 changer transitions 0/109 dead transitions. [2024-11-09 10:40:14,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 773 flow [2024-11-09 10:40:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:40:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:40:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 675 transitions. [2024-11-09 10:40:14,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7313109425785482 [2024-11-09 10:40:14,030 INFO L175 Difference]: Start difference. First operand has 106 places, 72 transitions, 408 flow. Second operand 13 states and 675 transitions. [2024-11-09 10:40:14,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 773 flow [2024-11-09 10:40:14,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 705 flow, removed 8 selfloop flow, removed 20 redundant places. [2024-11-09 10:40:14,034 INFO L231 Difference]: Finished difference. Result has 97 places, 69 transitions, 334 flow [2024-11-09 10:40:14,034 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=334, PETRI_PLACES=97, PETRI_TRANSITIONS=69} [2024-11-09 10:40:14,035 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 24 predicate places. [2024-11-09 10:40:14,035 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 69 transitions, 334 flow [2024-11-09 10:40:14,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 50.61538461538461) internal successors, (658), 13 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:14,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:40:14,036 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:40:14,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 10:40:14,036 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:40:14,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:40:14,037 INFO L85 PathProgramCache]: Analyzing trace with hash -818952319, now seen corresponding path program 2 times [2024-11-09 10:40:14,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:40:14,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152966791] [2024-11-09 10:40:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:40:14,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:40:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:40:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 423 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:40:15,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:40:15,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152966791] [2024-11-09 10:40:15,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152966791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:40:15,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516363081] [2024-11-09 10:40:15,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:40:15,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:40:15,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:40:15,039 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:40:15,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:40:15,582 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:40:15,582 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:40:15,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:40:15,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:40:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 423 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:40:16,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:40:16,383 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 29 treesize of output 25 [2024-11-09 10:40:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 423 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:40:16,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516363081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:40:16,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:40:16,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2024-11-09 10:40:16,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033780300] [2024-11-09 10:40:16,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:40:16,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 10:40:16,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:40:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 10:40:16,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2024-11-09 10:40:17,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 71 [2024-11-09 10:40:17,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 69 transitions, 334 flow. Second operand has 24 states, 24 states have (on average 49.333333333333336) internal successors, (1184), 24 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:17,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:40:17,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 71 [2024-11-09 10:40:17,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:40:17,460 INFO L124 PetriNetUnfolderBase]: 108/474 cut-off events. [2024-11-09 10:40:17,460 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2024-11-09 10:40:17,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 474 events. 108/474 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2141 event pairs, 26 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 946. Up to 138 conditions per place. [2024-11-09 10:40:17,462 INFO L140 encePairwiseOnDemand]: 62/71 looper letters, 96 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-11-09 10:40:17,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 131 transitions, 821 flow [2024-11-09 10:40:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 10:40:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-09 10:40:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 802 transitions. [2024-11-09 10:40:17,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7059859154929577 [2024-11-09 10:40:17,465 INFO L175 Difference]: Start difference. First operand has 97 places, 69 transitions, 334 flow. Second operand 16 states and 802 transitions. [2024-11-09 10:40:17,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 131 transitions, 821 flow [2024-11-09 10:40:17,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 131 transitions, 777 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-11-09 10:40:17,470 INFO L231 Difference]: Finished difference. Result has 102 places, 74 transitions, 368 flow [2024-11-09 10:40:17,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=368, PETRI_PLACES=102, PETRI_TRANSITIONS=74} [2024-11-09 10:40:17,470 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 29 predicate places. [2024-11-09 10:40:17,471 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 74 transitions, 368 flow [2024-11-09 10:40:17,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 49.333333333333336) internal successors, (1184), 24 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:40:17,471 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:40:17,471 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:40:17,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 10:40:17,672 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,SelfDestructingSolverStorable16 [2024-11-09 10:40:17,672 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:40:17,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:40:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 382282221, now seen corresponding path program 1 times [2024-11-09 10:40:17,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:40:17,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665916577] [2024-11-09 10:40:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:40:17,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:40:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat