./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:29:48,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:29:48,854 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:29:48,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:29:48,859 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:29:48,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:29:48,892 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:29:48,892 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:29:48,893 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:29:48,894 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:29:48,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:29:48,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:29:48,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:29:48,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:29:48,898 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:29:48,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:29:48,899 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:29:48,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:29:48,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:29:48,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:29:48,900 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:29:48,903 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:29:48,903 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:29:48,904 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:29:48,904 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:29:48,904 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:29:48,904 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:29:48,905 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:29:48,905 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:29:48,905 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:29:48,905 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:29:48,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:29:48,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:29:48,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:29:48,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:29:48,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:29:48,907 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:29:48,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:29:48,907 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:29:48,908 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:29:48,908 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:29:48,908 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:29:48,909 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2024-11-17 03:29:49,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:29:49,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:29:49,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:29:49,190 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:29:49,190 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:29:49,192 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i [2024-11-17 03:29:50,633 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:29:50,915 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:29:50,917 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i [2024-11-17 03:29:50,938 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cca2526f5/dfe64233f17543a08d69c55181b7ffdc/FLAG27211cea8 [2024-11-17 03:29:50,953 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cca2526f5/dfe64233f17543a08d69c55181b7ffdc [2024-11-17 03:29:50,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:29:50,958 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:29:50,961 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:29:50,961 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:29:50,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:29:50,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:29:50" (1/1) ... [2024-11-17 03:29:50,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72212b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:50, skipping insertion in model container [2024-11-17 03:29:50,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:29:50" (1/1) ... [2024-11-17 03:29:51,021 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:29:51,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:29:51,787 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:29:51,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:29:51,970 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:29:51,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51 WrapperNode [2024-11-17 03:29:51,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:29:51,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:29:51,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:29:51,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:29:51,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,177 INFO L138 Inliner]: procedures = 280, calls = 1603, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1773 [2024-11-17 03:29:52,178 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:29:52,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:29:52,179 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:29:52,179 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:29:52,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,205 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,267 INFO L175 MemorySlicer]: Split 1569 memory accesses to 8 slices as follows [2, 5, 14, 259, 5, 1280, 2, 2]. 82 percent of accesses are in the largest equivalence class. The 1548 initializations are split as follows [2, 5, 0, 256, 5, 1280, 0, 0]. The 11 writes are split as follows [0, 0, 8, 1, 0, 0, 1, 1]. [2024-11-17 03:29:52,269 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,269 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,315 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,320 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,341 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:29:52,360 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:29:52,360 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:29:52,360 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:29:52,361 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (1/1) ... [2024-11-17 03:29:52,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:29:52,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:52,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:29:52,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:29:52,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-17 03:29:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-17 03:29:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-17 03:29:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-17 03:29:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-17 03:29:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-17 03:29:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-17 03:29:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-17 03:29:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-11-17 03:29:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-17 03:29:52,452 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-17 03:29:52,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-17 03:29:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-17 03:29:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-17 03:29:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-17 03:29:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-17 03:29:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-17 03:29:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-11-17 03:29:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-11-17 03:29:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-11-17 03:29:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:29:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:29:52,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:29:52,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:29:52,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-17 03:29:52,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-17 03:29:52,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-17 03:29:52,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-17 03:29:52,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-17 03:29:52,457 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-17 03:29:52,457 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-17 03:29:52,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:29:52,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:29:52,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:29:52,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-17 03:29:52,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-17 03:29:52,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-17 03:29:52,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-17 03:29:52,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-17 03:29:52,459 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:29:52,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:29:52,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:29:52,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-17 03:29:52,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-17 03:29:52,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-17 03:29:52,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-17 03:29:52,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-17 03:29:52,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-11-17 03:29:52,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-11-17 03:29:52,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-11-17 03:29:52,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:29:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:29:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:29:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-17 03:29:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-17 03:29:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-17 03:29:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-17 03:29:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-17 03:29:52,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:29:52,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:29:52,465 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:29:52,687 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:29:52,689 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:29:54,677 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1050: havoc main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset; [2024-11-17 03:29:54,678 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1050-1: SUMMARY for call ULTIMATE.dealloc(main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset); srcloc: null [2024-11-17 03:29:54,678 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1051: havoc main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset; [2024-11-17 03:29:54,679 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1051-1: SUMMARY for call ULTIMATE.dealloc(main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset); srcloc: null [2024-11-17 03:29:54,680 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:29:54,681 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:30:35,118 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:30:35,118 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:30:35,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:30:35 BoogieIcfgContainer [2024-11-17 03:30:35,119 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:30:35,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:30:35,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:30:35,129 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:30:35,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:29:50" (1/3) ... [2024-11-17 03:30:35,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f63df19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:30:35, skipping insertion in model container [2024-11-17 03:30:35,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:51" (2/3) ... [2024-11-17 03:30:35,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f63df19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:30:35, skipping insertion in model container [2024-11-17 03:30:35,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:30:35" (3/3) ... [2024-11-17 03:30:35,133 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing-deref.i [2024-11-17 03:30:35,151 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:30:35,151 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2024-11-17 03:30:35,151 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:30:35,313 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:30:35,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 163 transitions, 346 flow [2024-11-17 03:30:35,866 INFO L124 PetriNetUnfolderBase]: 54/339 cut-off events. [2024-11-17 03:30:35,868 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:30:35,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 339 events. 54/339 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1772 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2024-11-17 03:30:35,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 163 transitions, 346 flow [2024-11-17 03:30:35,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 163 transitions, 346 flow [2024-11-17 03:30:35,915 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:30:35,924 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;@5cfa0723, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:30:35,924 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-11-17 03:30:35,974 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:30:35,974 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:30:35,975 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:30:35,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:35,976 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:30:35,977 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:35,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash 115083591, now seen corresponding path program 1 times [2024-11-17 03:30:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375181703] [2024-11-17 03:30:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:37,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:37,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375181703] [2024-11-17 03:30:37,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375181703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:37,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:37,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:30:37,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015834160] [2024-11-17 03:30:37,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:37,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:30:37,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:37,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:30:37,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:30:37,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 163 [2024-11-17 03:30:37,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 163 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:37,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:37,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 163 [2024-11-17 03:30:37,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:38,328 INFO L124 PetriNetUnfolderBase]: 3268/7813 cut-off events. [2024-11-17 03:30:38,328 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2024-11-17 03:30:38,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13105 conditions, 7813 events. 3268/7813 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 67986 event pairs, 3059 based on Foata normal form. 1600/8552 useless extension candidates. Maximal degree in co-relation 11556. Up to 5189 conditions per place. [2024-11-17 03:30:38,768 INFO L140 encePairwiseOnDemand]: 141/163 looper letters, 57 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2024-11-17 03:30:38,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 142 transitions, 422 flow [2024-11-17 03:30:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:30:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:30:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2024-11-17 03:30:38,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6707566462167689 [2024-11-17 03:30:38,789 INFO L175 Difference]: Start difference. First operand has 143 places, 163 transitions, 346 flow. Second operand 3 states and 328 transitions. [2024-11-17 03:30:38,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 142 transitions, 422 flow [2024-11-17 03:30:38,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 142 transitions, 422 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:30:38,805 INFO L231 Difference]: Finished difference. Result has 142 places, 142 transitions, 308 flow [2024-11-17 03:30:38,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=308, PETRI_PLACES=142, PETRI_TRANSITIONS=142} [2024-11-17 03:30:38,814 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, -1 predicate places. [2024-11-17 03:30:38,816 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 142 transitions, 308 flow [2024-11-17 03:30:38,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:38,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:38,817 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:30:38,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:30:38,817 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:38,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 115083592, now seen corresponding path program 1 times [2024-11-17 03:30:38,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:38,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171378627] [2024-11-17 03:30:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:39,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:39,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171378627] [2024-11-17 03:30:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171378627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:39,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:39,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:30:39,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989622267] [2024-11-17 03:30:39,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:39,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:30:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:30:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:30:39,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 163 [2024-11-17 03:30:39,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 142 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:39,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:39,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 163 [2024-11-17 03:30:39,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:40,905 INFO L124 PetriNetUnfolderBase]: 3268/7811 cut-off events. [2024-11-17 03:30:40,906 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-11-17 03:30:40,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13105 conditions, 7811 events. 3268/7811 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 67948 event pairs, 3059 based on Foata normal form. 2/6952 useless extension candidates. Maximal degree in co-relation 13089. Up to 5189 conditions per place. [2024-11-17 03:30:40,965 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 56 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2024-11-17 03:30:40,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 140 transitions, 420 flow [2024-11-17 03:30:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:30:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:30:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2024-11-17 03:30:40,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6380368098159509 [2024-11-17 03:30:40,967 INFO L175 Difference]: Start difference. First operand has 142 places, 142 transitions, 308 flow. Second operand 3 states and 312 transitions. [2024-11-17 03:30:40,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 140 transitions, 420 flow [2024-11-17 03:30:40,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 140 transitions, 416 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:30:40,977 INFO L231 Difference]: Finished difference. Result has 140 places, 140 transitions, 304 flow [2024-11-17 03:30:40,978 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=140, PETRI_TRANSITIONS=140} [2024-11-17 03:30:40,978 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, -3 predicate places. [2024-11-17 03:30:40,979 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 140 transitions, 304 flow [2024-11-17 03:30:40,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:40,979 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:40,979 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:30:40,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:30:40,980 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:40,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1073702230, now seen corresponding path program 1 times [2024-11-17 03:30:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:40,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933505084] [2024-11-17 03:30:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:40,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:41,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:41,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933505084] [2024-11-17 03:30:41,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933505084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:41,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:41,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:30:41,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624629138] [2024-11-17 03:30:41,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:41,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:30:41,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:30:41,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:30:41,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 163 [2024-11-17 03:30:41,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 140 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:41,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:41,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 163 [2024-11-17 03:30:41,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:43,094 INFO L124 PetriNetUnfolderBase]: 4064/9643 cut-off events. [2024-11-17 03:30:43,095 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-11-17 03:30:43,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16392 conditions, 9643 events. 4064/9643 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 86306 event pairs, 2177 based on Foata normal form. 0/8635 useless extension candidates. Maximal degree in co-relation 16376. Up to 3708 conditions per place. [2024-11-17 03:30:43,157 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 130 selfloop transitions, 4 changer transitions 0/212 dead transitions. [2024-11-17 03:30:43,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 212 transitions, 716 flow [2024-11-17 03:30:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:30:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:30:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 467 transitions. [2024-11-17 03:30:43,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7162576687116564 [2024-11-17 03:30:43,160 INFO L175 Difference]: Start difference. First operand has 140 places, 140 transitions, 304 flow. Second operand 4 states and 467 transitions. [2024-11-17 03:30:43,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 212 transitions, 716 flow [2024-11-17 03:30:43,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 712 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:30:43,168 INFO L231 Difference]: Finished difference. Result has 143 places, 141 transitions, 330 flow [2024-11-17 03:30:43,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=143, PETRI_TRANSITIONS=141} [2024-11-17 03:30:43,169 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 0 predicate places. [2024-11-17 03:30:43,169 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 141 transitions, 330 flow [2024-11-17 03:30:43,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:43,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:43,170 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:30:43,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:30:43,171 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:43,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1073702229, now seen corresponding path program 1 times [2024-11-17 03:30:43,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:43,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623777415] [2024-11-17 03:30:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:43,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:44,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:44,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623777415] [2024-11-17 03:30:44,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623777415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:44,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:44,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:30:44,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210061468] [2024-11-17 03:30:44,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:44,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:30:44,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:44,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:30:44,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:30:44,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 163 [2024-11-17 03:30:44,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 141 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:44,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:44,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 163 [2024-11-17 03:30:44,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:45,287 INFO L124 PetriNetUnfolderBase]: 4084/10044 cut-off events. [2024-11-17 03:30:45,287 INFO L125 PetriNetUnfolderBase]: For 1651/1681 co-relation queries the response was YES. [2024-11-17 03:30:45,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17932 conditions, 10044 events. 4084/10044 cut-off events. For 1651/1681 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 91978 event pairs, 3767 based on Foata normal form. 0/8964 useless extension candidates. Maximal degree in co-relation 16061. Up to 6646 conditions per place. [2024-11-17 03:30:45,354 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 65 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2024-11-17 03:30:45,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 144 transitions, 470 flow [2024-11-17 03:30:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:30:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:30:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2024-11-17 03:30:45,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6339468302658486 [2024-11-17 03:30:45,357 INFO L175 Difference]: Start difference. First operand has 143 places, 141 transitions, 330 flow. Second operand 3 states and 310 transitions. [2024-11-17 03:30:45,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 144 transitions, 470 flow [2024-11-17 03:30:45,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 144 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:30:45,366 INFO L231 Difference]: Finished difference. Result has 145 places, 142 transitions, 342 flow [2024-11-17 03:30:45,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=145, PETRI_TRANSITIONS=142} [2024-11-17 03:30:45,368 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 2 predicate places. [2024-11-17 03:30:45,369 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 142 transitions, 342 flow [2024-11-17 03:30:45,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:45,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:45,371 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2024-11-17 03:30:45,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:30:45,371 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:45,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:45,374 INFO L85 PathProgramCache]: Analyzing trace with hash -27564195, now seen corresponding path program 1 times [2024-11-17 03:30:45,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:45,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117493315] [2024-11-17 03:30:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:45,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:46,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:46,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117493315] [2024-11-17 03:30:46,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117493315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:46,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751749537] [2024-11-17 03:30:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:46,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:46,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:46,649 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:30:46,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:30:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:47,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 3791 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:30:47,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:30:47,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:30:47,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:30:47,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:30:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:47,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:47,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:30:47,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:30:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:47,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751749537] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:47,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:47,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-17 03:30:47,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812844315] [2024-11-17 03:30:47,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:47,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:30:47,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:47,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:30:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:30:49,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 163 [2024-11-17 03:30:49,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 142 transitions, 342 flow. Second operand has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:49,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:49,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 163 [2024-11-17 03:30:49,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:50,639 INFO L124 PetriNetUnfolderBase]: 4086/10063 cut-off events. [2024-11-17 03:30:50,639 INFO L125 PetriNetUnfolderBase]: For 1116/1146 co-relation queries the response was YES. [2024-11-17 03:30:50,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17976 conditions, 10063 events. 4086/10063 cut-off events. For 1116/1146 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 92117 event pairs, 3767 based on Foata normal form. 1/8985 useless extension candidates. Maximal degree in co-relation 17953. Up to 6648 conditions per place. [2024-11-17 03:30:50,726 INFO L140 encePairwiseOnDemand]: 157/163 looper letters, 72 selfloop transitions, 8 changer transitions 0/157 dead transitions. [2024-11-17 03:30:50,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 157 transitions, 542 flow [2024-11-17 03:30:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:30:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:30:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2024-11-17 03:30:50,729 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5687992988606485 [2024-11-17 03:30:50,729 INFO L175 Difference]: Start difference. First operand has 145 places, 142 transitions, 342 flow. Second operand 7 states and 649 transitions. [2024-11-17 03:30:50,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 157 transitions, 542 flow [2024-11-17 03:30:50,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 157 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:30:50,737 INFO L231 Difference]: Finished difference. Result has 154 places, 148 transitions, 398 flow [2024-11-17 03:30:50,738 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=154, PETRI_TRANSITIONS=148} [2024-11-17 03:30:50,741 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 11 predicate places. [2024-11-17 03:30:50,741 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 148 transitions, 398 flow [2024-11-17 03:30:50,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:50,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:50,742 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:50,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:30:50,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:50,943 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:50,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:50,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1621203157, now seen corresponding path program 1 times [2024-11-17 03:30:50,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:50,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458626328] [2024-11-17 03:30:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:30:51,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:51,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458626328] [2024-11-17 03:30:51,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458626328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:51,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:51,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:30:51,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198781925] [2024-11-17 03:30:51,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:51,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:30:51,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:30:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:30:51,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 163 [2024-11-17 03:30:51,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 148 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:51,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:51,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 163 [2024-11-17 03:30:51,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:52,277 INFO L124 PetriNetUnfolderBase]: 4444/10607 cut-off events. [2024-11-17 03:30:52,277 INFO L125 PetriNetUnfolderBase]: For 946/976 co-relation queries the response was YES. [2024-11-17 03:30:52,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19070 conditions, 10607 events. 4444/10607 cut-off events. For 946/976 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 97480 event pairs, 2895 based on Foata normal form. 0/9586 useless extension candidates. Maximal degree in co-relation 19011. Up to 4462 conditions per place. [2024-11-17 03:30:52,355 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 101 selfloop transitions, 4 changer transitions 0/182 dead transitions. [2024-11-17 03:30:52,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 680 flow [2024-11-17 03:30:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:30:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:30:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2024-11-17 03:30:52,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7034764826175869 [2024-11-17 03:30:52,357 INFO L175 Difference]: Start difference. First operand has 154 places, 148 transitions, 398 flow. Second operand 3 states and 344 transitions. [2024-11-17 03:30:52,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 680 flow [2024-11-17 03:30:52,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 182 transitions, 676 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:30:52,364 INFO L231 Difference]: Finished difference. Result has 153 places, 146 transitions, 398 flow [2024-11-17 03:30:52,365 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=153, PETRI_TRANSITIONS=146} [2024-11-17 03:30:52,365 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 10 predicate places. [2024-11-17 03:30:52,365 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 146 transitions, 398 flow [2024-11-17 03:30:52,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:52,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:52,366 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:52,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:30:52,366 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:52,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1621203156, now seen corresponding path program 1 times [2024-11-17 03:30:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:52,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271542750] [2024-11-17 03:30:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:52,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271542750] [2024-11-17 03:30:52,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271542750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151197809] [2024-11-17 03:30:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:52,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:52,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:52,766 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:30:52,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:30:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:53,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 3831 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 03:30:53,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:53,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:53,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151197809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:53,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:53,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-17 03:30:53,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184364472] [2024-11-17 03:30:53,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:53,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:30:53,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:53,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:30:53,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:30:53,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 163 [2024-11-17 03:30:53,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 146 transitions, 398 flow. Second operand has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:53,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:53,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 163 [2024-11-17 03:30:53,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:54,250 INFO L124 PetriNetUnfolderBase]: 3973/9832 cut-off events. [2024-11-17 03:30:54,251 INFO L125 PetriNetUnfolderBase]: For 1546/1634 co-relation queries the response was YES. [2024-11-17 03:30:54,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17711 conditions, 9832 events. 3973/9832 cut-off events. For 1546/1634 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 89922 event pairs, 3660 based on Foata normal form. 4/8792 useless extension candidates. Maximal degree in co-relation 17648. Up to 6452 conditions per place. [2024-11-17 03:30:54,315 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 69 selfloop transitions, 8 changer transitions 0/155 dead transitions. [2024-11-17 03:30:54,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 155 transitions, 574 flow [2024-11-17 03:30:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:30:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:30:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 759 transitions. [2024-11-17 03:30:54,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5820552147239264 [2024-11-17 03:30:54,317 INFO L175 Difference]: Start difference. First operand has 153 places, 146 transitions, 398 flow. Second operand 8 states and 759 transitions. [2024-11-17 03:30:54,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 155 transitions, 574 flow [2024-11-17 03:30:54,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 155 transitions, 564 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-17 03:30:54,324 INFO L231 Difference]: Finished difference. Result has 163 places, 146 transitions, 422 flow [2024-11-17 03:30:54,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=422, PETRI_PLACES=163, PETRI_TRANSITIONS=146} [2024-11-17 03:30:54,325 INFO L277 CegarLoopForPetriNet]: 143 programPoint places, 20 predicate places. [2024-11-17 03:30:54,325 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 146 transitions, 422 flow [2024-11-17 03:30:54,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:54,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:54,326 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1] [2024-11-17 03:30:54,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:30:54,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-17 03:30:54,527 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-17 03:30:54,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1720633643, now seen corresponding path program 2 times [2024-11-17 03:30:54,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:54,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460719150] [2024-11-17 03:30:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:54,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460719150] [2024-11-17 03:30:56,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460719150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:56,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260108584] [2024-11-17 03:30:56,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:30:56,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:56,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:30:56,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process