./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:48:51,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:48:51,208 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:48:51,213 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:48:51,216 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:48:51,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:48:51,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:48:51,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:48:51,244 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:48:51,245 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:48:51,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:48:51,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:48:51,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:48:51,246 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:48:51,246 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:48:51,246 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:48:51,246 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:48:51,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:48:51,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:48:51,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:48:51,247 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:48:51,248 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:48:51,248 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:48:51,248 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:48:51,248 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:48:51,248 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:48:51,249 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:48:51,249 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:48:51,249 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:48:51,249 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:48:51,249 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:48:51,250 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:48:51,250 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:48:51,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:48:51,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:48:51,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:48:51,251 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:48:51,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:48:51,251 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:48:51,251 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:48:51,251 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:48:51,252 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:48:51,252 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 [2024-10-11 19:48:51,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:48:51,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:48:51,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:48:51,507 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:48:51,507 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:48:51,508 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2024-10-11 19:48:52,845 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:48:53,059 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:48:53,060 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2024-10-11 19:48:53,082 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/dcf0fcbe9/112fc73d67bd4ea792b19b9569f5b896/FLAGe80f22d91 [2024-10-11 19:48:53,093 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/dcf0fcbe9/112fc73d67bd4ea792b19b9569f5b896 [2024-10-11 19:48:53,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:48:53,097 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:48:53,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:48:53,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:48:53,103 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:48:53,104 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61dde3c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53, skipping insertion in model container [2024-10-11 19:48:53,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,150 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:48:53,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:48:53,653 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:48:53,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:48:53,760 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:48:53,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53 WrapperNode [2024-10-11 19:48:53,761 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:48:53,761 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:48:53,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:48:53,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:48:53,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,807 INFO L138 Inliner]: procedures = 279, calls = 69, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 254 [2024-10-11 19:48:53,807 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:48:53,808 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:48:53,808 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:48:53,808 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:48:53,819 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,823 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,850 INFO L175 MemorySlicer]: Split 35 memory accesses to 8 slices as follows [2, 5, 4, 5, 1, 14, 2, 2]. 40 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 0, 5, 0, 0, 0, 0]. The 13 writes are split as follows [0, 0, 2, 0, 1, 8, 1, 1]. [2024-10-11 19:48:53,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,873 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,886 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:48:53,892 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:48:53,893 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:48:53,893 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:48:53,894 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (1/1) ... [2024-10-11 19:48:53,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:48:53,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:53,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:48:53,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:48:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 19:48:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-11 19:48:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-11 19:48:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-11 19:48:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-11 19:48:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-10-11 19:48:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-10-11 19:48:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-10-11 19:48:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-10-11 19:48:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-10-11 19:48:53,985 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-10-11 19:48:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 19:48:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:48:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:48:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:48:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:48:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 19:48:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-11 19:48:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-11 19:48:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-11 19:48:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-11 19:48:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-10-11 19:48:53,988 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-10-11 19:48:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:48:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:48:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:48:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 19:48:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-11 19:48:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-10-11 19:48:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-10-11 19:48:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-10-11 19:48:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:48:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:48:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:48:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 19:48:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-11 19:48:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-11 19:48:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-11 19:48:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-11 19:48:53,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:48:53,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:48:53,995 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:48:54,198 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:48:54,199 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:48:54,626 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:48:54,626 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:48:54,872 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:48:54,872 INFO L314 CfgBuilder]: Removed 16 assume(true) statements. [2024-10-11 19:48:54,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:48:54 BoogieIcfgContainer [2024-10-11 19:48:54,873 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:48:54,874 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:48:54,874 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:48:54,877 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:48:54,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:48:53" (1/3) ... [2024-10-11 19:48:54,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288e40b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:48:54, skipping insertion in model container [2024-10-11 19:48:54,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:53" (2/3) ... [2024-10-11 19:48:54,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288e40b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:48:54, skipping insertion in model container [2024-10-11 19:48:54,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:48:54" (3/3) ... [2024-10-11 19:48:54,879 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2024-10-11 19:48:54,892 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:48:54,893 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2024-10-11 19:48:54,893 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:48:54,977 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 19:48:55,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 308 flow [2024-10-11 19:48:55,079 INFO L124 PetriNetUnfolderBase]: 39/286 cut-off events. [2024-10-11 19:48:55,079 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 19:48:55,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 286 events. 39/286 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1513 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2024-10-11 19:48:55,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 308 flow [2024-10-11 19:48:55,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 308 flow [2024-10-11 19:48:55,123 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:48:55,132 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;@7abab2ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:48:55,132 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-10-11 19:48:55,136 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:48:55,136 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:48:55,136 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:48:55,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:55,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:48:55,138 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:48:55,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash 697562, now seen corresponding path program 1 times [2024-10-11 19:48:55,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:55,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101224409] [2024-10-11 19:48:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:55,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:55,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:55,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101224409] [2024-10-11 19:48:55,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101224409] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:55,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:55,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:55,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353027234] [2024-10-11 19:48:55,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:55,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:55,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:55,581 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2024-10-11 19:48:55,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2024-10-11 19:48:55,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:55,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2024-10-11 19:48:55,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:56,477 INFO L124 PetriNetUnfolderBase]: 3268/7601 cut-off events. [2024-10-11 19:48:56,478 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-10-11 19:48:56,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12893 conditions, 7601 events. 3268/7601 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61720 event pairs, 3059 based on Foata normal form. 520/6969 useless extension candidates. Maximal degree in co-relation 11394. Up to 5189 conditions per place. [2024-10-11 19:48:56,541 INFO L140 encePairwiseOnDemand]: 127/144 looper letters, 57 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2024-10-11 19:48:56,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 394 flow [2024-10-11 19:48:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-10-11 19:48:56,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2024-10-11 19:48:56,563 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 308 flow. Second operand 3 states and 281 transitions. [2024-10-11 19:48:56,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 394 flow [2024-10-11 19:48:56,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:48:56,576 INFO L231 Difference]: Finished difference. Result has 128 places, 128 transitions, 280 flow [2024-10-11 19:48:56,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=128, PETRI_TRANSITIONS=128} [2024-10-11 19:48:56,585 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2024-10-11 19:48:56,585 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 128 transitions, 280 flow [2024-10-11 19:48:56,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2024-10-11 19:48:56,586 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:56,586 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:48:56,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:48:56,587 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:48:56,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:56,587 INFO L85 PathProgramCache]: Analyzing trace with hash 697563, now seen corresponding path program 1 times [2024-10-11 19:48:56,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:56,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607820648] [2024-10-11 19:48:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:56,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:56,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607820648] [2024-10-11 19:48:56,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607820648] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:56,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:56,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:56,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743303143] [2024-10-11 19:48:56,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:56,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:56,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 144 [2024-10-11 19:48:56,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:48:56,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:56,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 144 [2024-10-11 19:48:56,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:57,520 INFO L124 PetriNetUnfolderBase]: 3268/7599 cut-off events. [2024-10-11 19:48:57,523 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-10-11 19:48:57,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12893 conditions, 7599 events. 3268/7599 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61765 event pairs, 3059 based on Foata normal form. 2/6450 useless extension candidates. Maximal degree in co-relation 12877. Up to 5189 conditions per place. [2024-10-11 19:48:57,576 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 56 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2024-10-11 19:48:57,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 392 flow [2024-10-11 19:48:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-10-11 19:48:57,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-11 19:48:57,578 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 280 flow. Second operand 3 states and 270 transitions. [2024-10-11 19:48:57,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 392 flow [2024-10-11 19:48:57,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:48:57,583 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 276 flow [2024-10-11 19:48:57,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2024-10-11 19:48:57,584 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2024-10-11 19:48:57,584 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 276 flow [2024-10-11 19:48:57,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:48:57,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:57,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-11 19:48:57,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:48:57,585 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:48:57,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash 21626201, now seen corresponding path program 1 times [2024-10-11 19:48:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:57,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476057437] [2024-10-11 19:48:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:57,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476057437] [2024-10-11 19:48:57,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476057437] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:57,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:57,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:57,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001999928] [2024-10-11 19:48:57,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:57,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:57,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:57,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-10-11 19:48:57,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2024-10-11 19:48:57,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:57,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-10-11 19:48:57,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:58,350 INFO L124 PetriNetUnfolderBase]: 3268/7605 cut-off events. [2024-10-11 19:48:58,350 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-10-11 19:48:58,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12904 conditions, 7605 events. 3268/7605 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61745 event pairs, 3059 based on Foata normal form. 1/6454 useless extension candidates. Maximal degree in co-relation 12879. Up to 5190 conditions per place. [2024-10-11 19:48:58,392 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 59 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2024-10-11 19:48:58,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 408 flow [2024-10-11 19:48:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-10-11 19:48:58,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2024-10-11 19:48:58,395 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 276 flow. Second operand 3 states and 278 transitions. [2024-10-11 19:48:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 408 flow [2024-10-11 19:48:58,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 129 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:48:58,405 INFO L231 Difference]: Finished difference. Result has 127 places, 127 transitions, 284 flow [2024-10-11 19:48:58,405 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=127} [2024-10-11 19:48:58,406 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -2 predicate places. [2024-10-11 19:48:58,407 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 127 transitions, 284 flow [2024-10-11 19:48:58,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2024-10-11 19:48:58,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:58,408 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:48:58,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 19:48:58,408 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:48:58,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:58,410 INFO L85 PathProgramCache]: Analyzing trace with hash 670378260, now seen corresponding path program 1 times [2024-10-11 19:48:58,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:58,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144179531] [2024-10-11 19:48:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:58,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:58,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:58,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144179531] [2024-10-11 19:48:58,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144179531] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:58,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:58,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:48:58,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34346108] [2024-10-11 19:48:58,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:58,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:48:58,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:58,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:48:58,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:48:58,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-11 19:48:58,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 127 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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) [2024-10-11 19:48:58,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:58,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-11 19:48:58,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:59,487 INFO L124 PetriNetUnfolderBase]: 4054/9521 cut-off events. [2024-10-11 19:48:59,488 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-10-11 19:48:59,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16278 conditions, 9521 events. 4054/9521 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83284 event pairs, 2177 based on Foata normal form. 2/8050 useless extension candidates. Maximal degree in co-relation 16258. Up to 3712 conditions per place. [2024-10-11 19:48:59,545 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 131 selfloop transitions, 4 changer transitions 0/199 dead transitions. [2024-10-11 19:48:59,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 698 flow [2024-10-11 19:48:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:48:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:48:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2024-10-11 19:48:59,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7135416666666666 [2024-10-11 19:48:59,547 INFO L175 Difference]: Start difference. First operand has 127 places, 127 transitions, 284 flow. Second operand 4 states and 411 transitions. [2024-10-11 19:48:59,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 698 flow [2024-10-11 19:48:59,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:48:59,553 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 312 flow [2024-10-11 19:48:59,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2024-10-11 19:48:59,558 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 2 predicate places. [2024-10-11 19:48:59,558 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 312 flow [2024-10-11 19:48:59,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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) [2024-10-11 19:48:59,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:59,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:48:59,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:48:59,558 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:48:59,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash 670378261, now seen corresponding path program 1 times [2024-10-11 19:48:59,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:59,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305748699] [2024-10-11 19:48:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:59,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:59,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:59,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305748699] [2024-10-11 19:48:59,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305748699] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:59,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:59,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:59,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139410176] [2024-10-11 19:48:59,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:59,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:48:59,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:48:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:48:59,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-11 19:48:59,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2024-10-11 19:48:59,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:59,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-11 19:48:59,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:00,768 INFO L124 PetriNetUnfolderBase]: 4084/9782 cut-off events. [2024-10-11 19:49:00,768 INFO L125 PetriNetUnfolderBase]: For 1601/1601 co-relation queries the response was YES. [2024-10-11 19:49:00,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17674 conditions, 9782 events. 4084/9782 cut-off events. For 1601/1601 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 85518 event pairs, 3767 based on Foata normal form. 1/8405 useless extension candidates. Maximal degree in co-relation 17640. Up to 6645 conditions per place. [2024-10-11 19:49:00,830 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2024-10-11 19:49:00,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 130 transitions, 448 flow [2024-10-11 19:49:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:49:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:49:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2024-10-11 19:49:00,831 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6226851851851852 [2024-10-11 19:49:00,832 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 312 flow. Second operand 3 states and 269 transitions. [2024-10-11 19:49:00,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 130 transitions, 448 flow [2024-10-11 19:49:00,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:49:00,838 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 318 flow [2024-10-11 19:49:00,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2024-10-11 19:49:00,839 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 4 predicate places. [2024-10-11 19:49:00,839 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 318 flow [2024-10-11 19:49:00,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2024-10-11 19:49:00,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:00,840 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:49:00,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:49:00,840 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:49:00,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash -358469821, now seen corresponding path program 1 times [2024-10-11 19:49:00,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:49:00,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389574414] [2024-10-11 19:49:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:00,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:49:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:00,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:49:00,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389574414] [2024-10-11 19:49:00,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389574414] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:49:00,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536445891] [2024-10-11 19:49:00,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:00,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:49:00,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:49:00,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:49:00,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:49:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:01,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:49:01,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:01,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:49:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:01,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536445891] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:49:01,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:49:01,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 19:49:01,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240381515] [2024-10-11 19:49:01,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:49:01,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 19:49:01,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:49:01,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 19:49:01,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 19:49:01,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-10-11 19:49:01,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 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) [2024-10-11 19:49:01,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:01,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-10-11 19:49:01,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:01,897 INFO L124 PetriNetUnfolderBase]: 3973/9561 cut-off events. [2024-10-11 19:49:01,897 INFO L125 PetriNetUnfolderBase]: For 934/995 co-relation queries the response was YES. [2024-10-11 19:49:01,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17134 conditions, 9561 events. 3973/9561 cut-off events. For 934/995 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 83274 event pairs, 3660 based on Foata normal form. 3/8200 useless extension candidates. Maximal degree in co-relation 17109. Up to 6451 conditions per place. [2024-10-11 19:49:01,959 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 64 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2024-10-11 19:49:01,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 480 flow [2024-10-11 19:49:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:49:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:49:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2024-10-11 19:49:01,965 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5821759259259259 [2024-10-11 19:49:01,966 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 318 flow. Second operand 6 states and 503 transitions. [2024-10-11 19:49:01,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 480 flow [2024-10-11 19:49:01,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:49:01,971 INFO L231 Difference]: Finished difference. Result has 140 places, 131 transitions, 354 flow [2024-10-11 19:49:01,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=140, PETRI_TRANSITIONS=131} [2024-10-11 19:49:01,973 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2024-10-11 19:49:01,974 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 131 transitions, 354 flow [2024-10-11 19:49:01,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 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) [2024-10-11 19:49:01,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:01,974 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-10-11 19:49:01,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:49:02,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:49:02,175 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:49:02,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1772303467, now seen corresponding path program 1 times [2024-10-11 19:49:02,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:49:02,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510213928] [2024-10-11 19:49:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:02,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:49:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:02,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:49:02,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510213928] [2024-10-11 19:49:02,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510213928] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:49:02,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786536802] [2024-10-11 19:49:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:02,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:49:02,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:49:02,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:49:02,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:49:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:02,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 19:49:02,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:49:02,595 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 [2024-10-11 19:49:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:49:02,669 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 [2024-10-11 19:49:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:02,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:49:02,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:49:02,834 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 [2024-10-11 19:49:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:02,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786536802] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:49:02,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:49:02,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-11 19:49:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022000626] [2024-10-11 19:49:02,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:49:02,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:49:02,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:49:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:49:02,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:49:04,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-11 19:49:04,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 131 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 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) [2024-10-11 19:49:04,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:04,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-11 19:49:04,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:05,244 INFO L124 PetriNetUnfolderBase]: 4084/9794 cut-off events. [2024-10-11 19:49:05,244 INFO L125 PetriNetUnfolderBase]: For 1091/1091 co-relation queries the response was YES. [2024-10-11 19:49:05,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17724 conditions, 9794 events. 4084/9794 cut-off events. For 1091/1091 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85448 event pairs, 3767 based on Foata normal form. 3/8419 useless extension candidates. Maximal degree in co-relation 17691. Up to 6645 conditions per place. [2024-10-11 19:49:05,324 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 69 selfloop transitions, 6 changer transitions 0/139 dead transitions. [2024-10-11 19:49:05,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 139 transitions, 532 flow [2024-10-11 19:49:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:49:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:49:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 552 transitions. [2024-10-11 19:49:05,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-10-11 19:49:05,327 INFO L175 Difference]: Start difference. First operand has 140 places, 131 transitions, 354 flow. Second operand 7 states and 552 transitions. [2024-10-11 19:49:05,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 139 transitions, 532 flow [2024-10-11 19:49:05,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 139 transitions, 522 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-10-11 19:49:05,331 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 386 flow [2024-10-11 19:49:05,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2024-10-11 19:49:05,331 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 20 predicate places. [2024-10-11 19:49:05,332 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 386 flow [2024-10-11 19:49:05,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 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) [2024-10-11 19:49:05,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:05,333 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-10-11 19:49:05,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 19:49:05,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:49:05,534 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:49:05,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1780832511, now seen corresponding path program 2 times [2024-10-11 19:49:05,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:49:05,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114625917] [2024-10-11 19:49:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:05,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:49:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 19:49:05,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:49:05,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114625917] [2024-10-11 19:49:05,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114625917] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:49:05,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:49:05,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:49:05,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709878482] [2024-10-11 19:49:05,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:49:05,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:49:05,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:49:05,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:49:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:49:05,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-11 19:49:05,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:49:05,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:05,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-11 19:49:05,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:06,809 INFO L124 PetriNetUnfolderBase]: 4432/10459 cut-off events. [2024-10-11 19:49:06,809 INFO L125 PetriNetUnfolderBase]: For 909/909 co-relation queries the response was YES. [2024-10-11 19:49:06,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18930 conditions, 10459 events. 4432/10459 cut-off events. For 909/909 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 93673 event pairs, 2895 based on Foata normal form. 0/8968 useless extension candidates. Maximal degree in co-relation 18887. Up to 4460 conditions per place. [2024-10-11 19:49:06,910 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 102 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2024-10-11 19:49:06,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 666 flow [2024-10-11 19:49:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:49:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:49:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2024-10-11 19:49:06,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2024-10-11 19:49:06,912 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 386 flow. Second operand 3 states and 302 transitions. [2024-10-11 19:49:06,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 666 flow [2024-10-11 19:49:06,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 167 transitions, 656 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-11 19:49:06,918 INFO L231 Difference]: Finished difference. Result has 145 places, 131 transitions, 376 flow [2024-10-11 19:49:06,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=145, PETRI_TRANSITIONS=131} [2024-10-11 19:49:06,918 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 16 predicate places. [2024-10-11 19:49:06,918 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 131 transitions, 376 flow [2024-10-11 19:49:06,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:49:06,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:06,919 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-10-11 19:49:06,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:49:06,919 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:49:06,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1780832510, now seen corresponding path program 1 times [2024-10-11 19:49:06,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:49:06,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725862188] [2024-10-11 19:49:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:06,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:49:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:07,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:49:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725862188] [2024-10-11 19:49:07,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725862188] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:49:07,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556625879] [2024-10-11 19:49:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:07,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:49:07,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:49:07,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:49:07,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:49:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:07,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:49:07,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:07,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:49:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:07,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556625879] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:49:07,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:49:07,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 19:49:07,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300930704] [2024-10-11 19:49:07,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:49:07,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:49:07,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:49:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:49:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 19:49:07,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-10-11 19:49:07,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 131 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 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) [2024-10-11 19:49:07,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:07,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-10-11 19:49:07,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:08,425 INFO L124 PetriNetUnfolderBase]: 3974/9590 cut-off events. [2024-10-11 19:49:08,425 INFO L125 PetriNetUnfolderBase]: For 1566/1629 co-relation queries the response was YES. [2024-10-11 19:49:08,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17543 conditions, 9590 events. 3974/9590 cut-off events. For 1566/1629 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83334 event pairs, 3661 based on Foata normal form. 6/8240 useless extension candidates. Maximal degree in co-relation 17479. Up to 6451 conditions per place. [2024-10-11 19:49:08,458 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 76 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2024-10-11 19:49:08,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 153 transitions, 658 flow [2024-10-11 19:49:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:49:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:49:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 956 transitions. [2024-10-11 19:49:08,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5532407407407407 [2024-10-11 19:49:08,464 INFO L175 Difference]: Start difference. First operand has 145 places, 131 transitions, 376 flow. Second operand 12 states and 956 transitions. [2024-10-11 19:49:08,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 153 transitions, 658 flow [2024-10-11 19:49:08,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 153 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:49:08,467 INFO L231 Difference]: Finished difference. Result has 161 places, 137 transitions, 472 flow [2024-10-11 19:49:08,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=472, PETRI_PLACES=161, PETRI_TRANSITIONS=137} [2024-10-11 19:49:08,469 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 32 predicate places. [2024-10-11 19:49:08,469 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 137 transitions, 472 flow [2024-10-11 19:49:08,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 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) [2024-10-11 19:49:08,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:08,470 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2024-10-11 19:49:08,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 19:49:08,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:49:08,671 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:49:08,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:08,671 INFO L85 PathProgramCache]: Analyzing trace with hash 628733037, now seen corresponding path program 2 times [2024-10-11 19:49:08,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:49:08,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078095107] [2024-10-11 19:49:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:08,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:49:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:09,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:49:09,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078095107] [2024-10-11 19:49:09,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078095107] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:49:09,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895009907] [2024-10-11 19:49:09,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:49:09,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:49:09,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:49:09,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:49:09,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 19:49:09,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:49:09,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:49:09,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-11 19:49:09,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:09,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:49:09,521 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 [2024-10-11 19:49:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:49:09,588 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 [2024-10-11 19:49:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:49:09,654 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 [2024-10-11 19:49:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:49:09,724 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 [2024-10-11 19:49:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:49:09,794 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 [2024-10-11 19:49:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:09,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:49:09,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:49:09,935 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 [2024-10-11 19:49:10,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:49:10,068 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 [2024-10-11 19:49:10,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:49:10,207 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 [2024-10-11 19:49:10,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:49:10,367 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 [2024-10-11 19:49:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:10,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895009907] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:49:10,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:49:10,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-10-11 19:49:10,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639868641] [2024-10-11 19:49:10,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:49:10,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 19:49:10,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:49:10,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 19:49:10,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2024-10-11 19:49:16,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-10-11 19:49:16,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 137 transitions, 472 flow. Second operand has 32 states, 32 states have (on average 69.5) internal successors, (2224), 32 states have internal predecessors, (2224), 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) [2024-10-11 19:49:16,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:16,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-10-11 19:49:16,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:18,065 INFO L124 PetriNetUnfolderBase]: 4084/9814 cut-off events. [2024-10-11 19:49:18,065 INFO L125 PetriNetUnfolderBase]: For 1230/1230 co-relation queries the response was YES. [2024-10-11 19:49:18,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17844 conditions, 9814 events. 4084/9814 cut-off events. For 1230/1230 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 85431 event pairs, 3767 based on Foata normal form. 6/8450 useless extension candidates. Maximal degree in co-relation 17794. Up to 6645 conditions per place. [2024-10-11 19:49:18,147 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 81 selfloop transitions, 12 changer transitions 0/155 dead transitions. [2024-10-11 19:49:18,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 155 transitions, 742 flow [2024-10-11 19:49:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 19:49:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 19:49:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 981 transitions. [2024-10-11 19:49:18,149 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5240384615384616 [2024-10-11 19:49:18,149 INFO L175 Difference]: Start difference. First operand has 161 places, 137 transitions, 472 flow. Second operand 13 states and 981 transitions. [2024-10-11 19:49:18,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 155 transitions, 742 flow [2024-10-11 19:49:18,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 155 transitions, 724 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-11 19:49:18,154 INFO L231 Difference]: Finished difference. Result has 176 places, 139 transitions, 526 flow [2024-10-11 19:49:18,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=526, PETRI_PLACES=176, PETRI_TRANSITIONS=139} [2024-10-11 19:49:18,154 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 47 predicate places. [2024-10-11 19:49:18,154 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 139 transitions, 526 flow [2024-10-11 19:49:18,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 69.5) internal successors, (2224), 32 states have internal predecessors, (2224), 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) [2024-10-11 19:49:18,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:18,155 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1] [2024-10-11 19:49:18,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 19:49:18,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 19:49:18,360 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:49:18,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:18,360 INFO L85 PathProgramCache]: Analyzing trace with hash 758386558, now seen corresponding path program 2 times [2024-10-11 19:49:18,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:49:18,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590011278] [2024-10-11 19:49:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:18,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:49:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:18,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:49:18,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590011278] [2024-10-11 19:49:18,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590011278] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:49:18,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968063912] [2024-10-11 19:49:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:49:18,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:49:18,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:49:18,713 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:49:18,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 19:49:18,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:49:18,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:49:18,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:49:18,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:18,885 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 [2024-10-11 19:49:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-11 19:49:18,904 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:49:18,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968063912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:49:18,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:49:18,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2024-10-11 19:49:18,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602587136] [2024-10-11 19:49:18,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:49:18,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:49:18,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:49:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:49:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:49:18,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 144 [2024-10-11 19:49:18,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 139 transitions, 526 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2024-10-11 19:49:18,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:18,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 144 [2024-10-11 19:49:18,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:19,801 INFO L124 PetriNetUnfolderBase]: 3889/9223 cut-off events. [2024-10-11 19:49:19,802 INFO L125 PetriNetUnfolderBase]: For 1134/1196 co-relation queries the response was YES. [2024-10-11 19:49:19,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16802 conditions, 9223 events. 3889/9223 cut-off events. For 1134/1196 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 79010 event pairs, 3605 based on Foata normal form. 1/8059 useless extension candidates. Maximal degree in co-relation 16739. Up to 6318 conditions per place. [2024-10-11 19:49:19,862 INFO L140 encePairwiseOnDemand]: 139/144 looper letters, 75 selfloop transitions, 3 changer transitions 0/142 dead transitions. [2024-10-11 19:49:19,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 142 transitions, 688 flow [2024-10-11 19:49:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:49:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:49:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2024-10-11 19:49:19,864 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6412037037037037 [2024-10-11 19:49:19,864 INFO L175 Difference]: Start difference. First operand has 176 places, 139 transitions, 526 flow. Second operand 3 states and 277 transitions. [2024-10-11 19:49:19,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 142 transitions, 688 flow [2024-10-11 19:49:19,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 142 transitions, 662 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-10-11 19:49:19,869 INFO L231 Difference]: Finished difference. Result has 169 places, 141 transitions, 521 flow [2024-10-11 19:49:19,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=521, PETRI_PLACES=169, PETRI_TRANSITIONS=141} [2024-10-11 19:49:19,870 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 40 predicate places. [2024-10-11 19:49:19,870 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 141 transitions, 521 flow [2024-10-11 19:49:19,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2024-10-11 19:49:19,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:19,870 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 1, 1] [2024-10-11 19:49:19,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 19:49:20,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 19:49:20,071 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-10-11 19:49:20,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:20,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2035112817, now seen corresponding path program 3 times [2024-10-11 19:49:20,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:49:20,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43367009] [2024-10-11 19:49:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:49:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:21,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:49:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43367009] [2024-10-11 19:49:21,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43367009] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:49:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478627900] [2024-10-11 19:49:21,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:49:21,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:49:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:49:21,762 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:49:21,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process