./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:22:42,247 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:22:42,301 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:22:42,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:22:42,307 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:22:42,325 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:22:42,326 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:22:42,326 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:22:42,326 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:22:42,327 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:22:42,327 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:22:42,327 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:22:42,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:22:42,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:22:42,328 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:22:42,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:22:42,328 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:22:42,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:22:42,328 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:22:42,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:22:42,328 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:22:42,328 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:22:42,328 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:22:42,329 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:22:42,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:22:42,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:22:42,330 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:22:42,330 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:22:42,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:22:42,330 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:22:42,330 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:22:42,330 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:22:42,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:22:42,330 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 [2025-03-17 14:22:42,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:22:42,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:22:42,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:22:42,543 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:22:42,543 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:22:42,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2025-03-17 14:22:43,632 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad115516/5f08740572cd48daa97fde06b475f964/FLAG604d0eb10 [2025-03-17 14:22:43,893 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:22:43,894 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2025-03-17 14:22:43,902 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad115516/5f08740572cd48daa97fde06b475f964/FLAG604d0eb10 [2025-03-17 14:22:43,913 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad115516/5f08740572cd48daa97fde06b475f964 [2025-03-17 14:22:43,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:22:43,918 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:22:43,919 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:22:43,919 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:22:43,922 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:22:43,923 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:22:43" (1/1) ... [2025-03-17 14:22:43,923 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e43265c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:43, skipping insertion in model container [2025-03-17 14:22:43,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:22:43" (1/1) ... [2025-03-17 14:22:43,938 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:22:44,060 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:22:44,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:22:44,074 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:22:44,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:22:44,110 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:22:44,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44 WrapperNode [2025-03-17 14:22:44,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:22:44,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:22:44,111 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:22:44,112 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:22:44,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,121 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,138 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 254 [2025-03-17 14:22:44,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:22:44,138 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:22:44,138 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:22:44,138 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:22:44,144 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,146 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,157 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 14:22:44,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,157 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,164 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,169 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,173 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:22:44,175 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:22:44,175 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:22:44,176 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:22:44,176 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (1/1) ... [2025-03-17 14:22:44,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:22:44,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:44,201 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) [2025-03-17 14:22:44,203 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 [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:22:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:22:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:22:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:22:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:22:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:22:44,220 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:22:44,318 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:22:44,320 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:22:44,669 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:22:44,669 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:22:44,884 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:22:44,885 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:22:44,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:22:44 BoogieIcfgContainer [2025-03-17 14:22:44,886 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:22:44,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:22:44,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:22:44,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:22:44,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:22:43" (1/3) ... [2025-03-17 14:22:44,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77750e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:22:44, skipping insertion in model container [2025-03-17 14:22:44,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:44" (2/3) ... [2025-03-17 14:22:44,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77750e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:22:44, skipping insertion in model container [2025-03-17 14:22:44,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:22:44" (3/3) ... [2025-03-17 14:22:44,893 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2025-03-17 14:22:44,903 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:22:44,904 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-trans.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 6 loop locations, and 32 error locations. [2025-03-17 14:22:44,905 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:22:44,965 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 14:22:44,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 195 flow [2025-03-17 14:22:45,024 INFO L124 PetriNetUnfolderBase]: 9/84 cut-off events. [2025-03-17 14:22:45,027 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:22:45,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 84 events. 9/84 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 273 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2025-03-17 14:22:45,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 195 flow [2025-03-17 14:22:45,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 184 flow [2025-03-17 14:22:45,043 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:22:45,050 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;@14a71d45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:22:45,050 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2025-03-17 14:22:45,053 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:22:45,053 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:22:45,053 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:22:45,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:45,054 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:22:45,054 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:45,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:45,057 INFO L85 PathProgramCache]: Analyzing trace with hash 751175, now seen corresponding path program 1 times [2025-03-17 14:22:45,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:45,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855115392] [2025-03-17 14:22:45,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:45,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:45,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:22:45,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:22:45,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:45,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:45,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:45,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855115392] [2025-03-17 14:22:45,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855115392] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:45,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:45,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:22:45,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064148822] [2025-03-17 14:22:45,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:45,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:22:45,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:45,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:22:45,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:22:45,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 87 [2025-03-17 14:22:45,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2025-03-17 14:22:45,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:45,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 87 [2025-03-17 14:22:45,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:45,570 INFO L124 PetriNetUnfolderBase]: 910/1527 cut-off events. [2025-03-17 14:22:45,570 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2025-03-17 14:22:45,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2860 conditions, 1527 events. 910/1527 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8116 event pairs, 550 based on Foata normal form. 1/1073 useless extension candidates. Maximal degree in co-relation 2600. Up to 1229 conditions per place. [2025-03-17 14:22:45,586 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 33 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2025-03-17 14:22:45,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 244 flow [2025-03-17 14:22:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:22:45,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:22:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2025-03-17 14:22:45,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6896551724137931 [2025-03-17 14:22:45,598 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 184 flow. Second operand 3 states and 180 transitions. [2025-03-17 14:22:45,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 244 flow [2025-03-17 14:22:45,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 232 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:45,604 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2025-03-17 14:22:45,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2025-03-17 14:22:45,608 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2025-03-17 14:22:45,609 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2025-03-17 14:22:45,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2025-03-17 14:22:45,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:45,610 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:22:45,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:22:45,610 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:45,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:45,611 INFO L85 PathProgramCache]: Analyzing trace with hash 751176, now seen corresponding path program 1 times [2025-03-17 14:22:45,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:45,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443753844] [2025-03-17 14:22:45,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:45,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:45,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:22:45,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:22:45,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:45,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:45,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:45,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443753844] [2025-03-17 14:22:45,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443753844] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:45,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:45,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:22:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112027590] [2025-03-17 14:22:45,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:45,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:22:45,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:45,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:22:45,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:22:45,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 87 [2025-03-17 14:22:45,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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) [2025-03-17 14:22:45,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:45,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 87 [2025-03-17 14:22:45,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:46,158 INFO L124 PetriNetUnfolderBase]: 911/1530 cut-off events. [2025-03-17 14:22:46,158 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-17 14:22:46,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2808 conditions, 1530 events. 911/1530 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8091 event pairs, 550 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 2771. Up to 1242 conditions per place. [2025-03-17 14:22:46,170 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 37 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2025-03-17 14:22:46,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 254 flow [2025-03-17 14:22:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:22:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:22:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2025-03-17 14:22:46,172 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6609195402298851 [2025-03-17 14:22:46,172 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 4 states and 230 transitions. [2025-03-17 14:22:46,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 254 flow [2025-03-17 14:22:46,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:22:46,174 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 189 flow [2025-03-17 14:22:46,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2025-03-17 14:22:46,176 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -6 predicate places. [2025-03-17 14:22:46,176 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 189 flow [2025-03-17 14:22:46,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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) [2025-03-17 14:22:46,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:46,177 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 14:22:46,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:22:46,177 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:46,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:46,179 INFO L85 PathProgramCache]: Analyzing trace with hash 23287670, now seen corresponding path program 1 times [2025-03-17 14:22:46,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:46,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253604032] [2025-03-17 14:22:46,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:46,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:46,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 14:22:46,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 14:22:46,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:46,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:46,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:46,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253604032] [2025-03-17 14:22:46,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253604032] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:46,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:46,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:22:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237471650] [2025-03-17 14:22:46,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:46,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:22:46,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:46,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:22:46,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:22:46,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 87 [2025-03-17 14:22:46,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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) [2025-03-17 14:22:46,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:46,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 87 [2025-03-17 14:22:46,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:46,667 INFO L124 PetriNetUnfolderBase]: 912/1533 cut-off events. [2025-03-17 14:22:46,668 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-17 14:22:46,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1533 events. 912/1533 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8124 event pairs, 550 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 2800. Up to 1241 conditions per place. [2025-03-17 14:22:46,679 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 37 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2025-03-17 14:22:46,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 283 flow [2025-03-17 14:22:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:22:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:22:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 280 transitions. [2025-03-17 14:22:46,682 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6436781609195402 [2025-03-17 14:22:46,682 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 189 flow. Second operand 5 states and 280 transitions. [2025-03-17 14:22:46,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 283 flow [2025-03-17 14:22:46,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:22:46,684 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 223 flow [2025-03-17 14:22:46,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2025-03-17 14:22:46,685 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-03-17 14:22:46,685 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 223 flow [2025-03-17 14:22:46,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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) [2025-03-17 14:22:46,685 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:46,685 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-03-17 14:22:46,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:22:46,685 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:46,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash 721919709, now seen corresponding path program 1 times [2025-03-17 14:22:46,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:46,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487458880] [2025-03-17 14:22:46,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:46,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:46,697 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:22:46,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:22:46,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:46,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:46,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:46,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487458880] [2025-03-17 14:22:46,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487458880] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:46,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:46,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:22:46,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94115508] [2025-03-17 14:22:46,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:46,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:22:46,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:46,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:22:46,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:22:47,043 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 87 [2025-03-17 14:22:47,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2025-03-17 14:22:47,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:47,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 87 [2025-03-17 14:22:47,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:47,264 INFO L124 PetriNetUnfolderBase]: 913/1536 cut-off events. [2025-03-17 14:22:47,264 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-17 14:22:47,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2847 conditions, 1536 events. 913/1536 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8154 event pairs, 550 based on Foata normal form. 0/1078 useless extension candidates. Maximal degree in co-relation 2816. Up to 1244 conditions per place. [2025-03-17 14:22:47,270 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 38 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2025-03-17 14:22:47,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 323 flow [2025-03-17 14:22:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:22:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:22:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 280 transitions. [2025-03-17 14:22:47,271 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6436781609195402 [2025-03-17 14:22:47,271 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 223 flow. Second operand 5 states and 280 transitions. [2025-03-17 14:22:47,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 323 flow [2025-03-17 14:22:47,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 87 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:22:47,273 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 265 flow [2025-03-17 14:22:47,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2025-03-17 14:22:47,274 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 4 predicate places. [2025-03-17 14:22:47,274 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 265 flow [2025-03-17 14:22:47,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2025-03-17 14:22:47,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:47,274 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:22:47,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:22:47,274 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:47,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash 721904796, now seen corresponding path program 1 times [2025-03-17 14:22:47,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:47,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342385428] [2025-03-17 14:22:47,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:47,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:47,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:22:47,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:22:47,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:47,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:47,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:47,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342385428] [2025-03-17 14:22:47,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342385428] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:47,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025018988] [2025-03-17 14:22:47,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:47,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:47,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:47,422 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) [2025-03-17 14:22:47,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:22:47,467 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:22:47,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:22:47,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:47,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:47,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:22:47,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:47,519 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 [2025-03-17 14:22:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:47,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:47,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025018988] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:47,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:47,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:22:47,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034815711] [2025-03-17 14:22:47,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:47,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:22:47,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:47,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:22:47,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:22:48,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 87 [2025-03-17 14:22:48,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 48.36363636363637) internal successors, (532), 11 states have internal predecessors, (532), 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) [2025-03-17 14:22:48,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:48,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 87 [2025-03-17 14:22:48,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:48,401 INFO L124 PetriNetUnfolderBase]: 913/1535 cut-off events. [2025-03-17 14:22:48,401 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-03-17 14:22:48,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2865 conditions, 1535 events. 913/1535 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8157 event pairs, 550 based on Foata normal form. 0/1080 useless extension candidates. Maximal degree in co-relation 2831. Up to 1244 conditions per place. [2025-03-17 14:22:48,410 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 39 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2025-03-17 14:22:48,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 353 flow [2025-03-17 14:22:48,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:22:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:22:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 323 transitions. [2025-03-17 14:22:48,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6187739463601533 [2025-03-17 14:22:48,411 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 265 flow. Second operand 6 states and 323 transitions. [2025-03-17 14:22:48,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 353 flow [2025-03-17 14:22:48,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 86 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:22:48,412 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 268 flow [2025-03-17 14:22:48,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2025-03-17 14:22:48,413 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 6 predicate places. [2025-03-17 14:22:48,413 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 268 flow [2025-03-17 14:22:48,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 48.36363636363637) internal successors, (532), 11 states have internal predecessors, (532), 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) [2025-03-17 14:22:48,413 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:48,413 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-17 14:22:48,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:22:48,614 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 [2025-03-17 14:22:48,617 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:48,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:48,617 INFO L85 PathProgramCache]: Analyzing trace with hash 904638172, now seen corresponding path program 1 times [2025-03-17 14:22:48,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:48,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471953363] [2025-03-17 14:22:48,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:48,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:48,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:22:48,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:22:48,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:48,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:48,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:48,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471953363] [2025-03-17 14:22:48,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471953363] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:48,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150010156] [2025-03-17 14:22:48,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:48,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:48,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:48,781 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) [2025-03-17 14:22:48,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:22:48,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:22:48,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:22:48,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:48,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:48,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:22:48,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:48,844 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 [2025-03-17 14:22:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:48,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150010156] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:49,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:49,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:22:49,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153325458] [2025-03-17 14:22:49,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:49,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:22:49,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:49,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:22:49,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:22:49,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 87 [2025-03-17 14:22:49,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 268 flow. Second operand has 13 states, 13 states have (on average 48.30769230769231) internal successors, (628), 13 states have internal predecessors, (628), 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) [2025-03-17 14:22:49,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:49,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 87 [2025-03-17 14:22:49,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:49,930 INFO L124 PetriNetUnfolderBase]: 915/1540 cut-off events. [2025-03-17 14:22:49,930 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-17 14:22:49,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 1540 events. 915/1540 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8154 event pairs, 550 based on Foata normal form. 0/1086 useless extension candidates. Maximal degree in co-relation 2837. Up to 1237 conditions per place. [2025-03-17 14:22:49,939 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 33 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2025-03-17 14:22:49,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 401 flow [2025-03-17 14:22:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 473 transitions. [2025-03-17 14:22:49,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6040868454661558 [2025-03-17 14:22:49,943 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 268 flow. Second operand 9 states and 473 transitions. [2025-03-17 14:22:49,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 401 flow [2025-03-17 14:22:49,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 354 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-17 14:22:49,946 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 288 flow [2025-03-17 14:22:49,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=288, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2025-03-17 14:22:49,946 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 5 predicate places. [2025-03-17 14:22:49,946 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 288 flow [2025-03-17 14:22:49,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 48.30769230769231) internal successors, (628), 13 states have internal predecessors, (628), 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) [2025-03-17 14:22:49,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:49,947 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-17 14:22:49,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:22:50,147 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,SelfDestructingSolverStorable5 [2025-03-17 14:22:50,148 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:50,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2019838367, now seen corresponding path program 1 times [2025-03-17 14:22:50,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:50,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333325809] [2025-03-17 14:22:50,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:50,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:22:50,162 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:22:50,162 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:50,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:50,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:50,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333325809] [2025-03-17 14:22:50,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333325809] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:50,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093539156] [2025-03-17 14:22:50,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:50,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:50,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:50,322 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) [2025-03-17 14:22:50,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:22:50,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:22:50,388 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:22:50,388 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:50,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:50,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:22:50,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:50,414 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 [2025-03-17 14:22:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:50,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:50,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093539156] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:50,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:50,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:22:50,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812057733] [2025-03-17 14:22:50,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:50,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:22:50,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:50,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:22:50,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:22:51,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 87 [2025-03-17 14:22:51,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 48.46153846153846) internal successors, (630), 13 states have internal predecessors, (630), 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) [2025-03-17 14:22:51,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:51,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 87 [2025-03-17 14:22:51,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:51,381 INFO L124 PetriNetUnfolderBase]: 915/1539 cut-off events. [2025-03-17 14:22:51,381 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-03-17 14:22:51,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 1539 events. 915/1539 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8150 event pairs, 550 based on Foata normal form. 0/1086 useless extension candidates. Maximal degree in co-relation 2822. Up to 1238 conditions per place. [2025-03-17 14:22:51,389 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 31 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2025-03-17 14:22:51,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 384 flow [2025-03-17 14:22:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:22:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:22:51,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 371 transitions. [2025-03-17 14:22:51,391 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-17 14:22:51,391 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 288 flow. Second operand 7 states and 371 transitions. [2025-03-17 14:22:51,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 384 flow [2025-03-17 14:22:51,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 351 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-03-17 14:22:51,393 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 289 flow [2025-03-17 14:22:51,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=289, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2025-03-17 14:22:51,394 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 5 predicate places. [2025-03-17 14:22:51,394 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 289 flow [2025-03-17 14:22:51,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 48.46153846153846) internal successors, (630), 13 states have internal predecessors, (630), 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) [2025-03-17 14:22:51,394 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:51,394 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:51,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 14:22:51,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:51,600 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:51,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1813564332, now seen corresponding path program 1 times [2025-03-17 14:22:51,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:51,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989518887] [2025-03-17 14:22:51,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:51,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:51,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:22:51,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:22:51,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:51,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:51,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:51,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989518887] [2025-03-17 14:22:51,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989518887] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:51,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:51,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:22:51,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526402945] [2025-03-17 14:22:51,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:51,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:22:51,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:51,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:22:51,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:22:51,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2025-03-17 14:22:51,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 50.4) internal successors, (252), 5 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) [2025-03-17 14:22:51,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:51,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2025-03-17 14:22:51,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:51,897 INFO L124 PetriNetUnfolderBase]: 1555/2853 cut-off events. [2025-03-17 14:22:51,898 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-03-17 14:22:51,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5161 conditions, 2853 events. 1555/2853 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18669 event pairs, 802 based on Foata normal form. 62/2125 useless extension candidates. Maximal degree in co-relation 3359. Up to 1441 conditions per place. [2025-03-17 14:22:51,906 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 99 selfloop transitions, 4 changer transitions 0/142 dead transitions. [2025-03-17 14:22:51,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 142 transitions, 663 flow [2025-03-17 14:22:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:22:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:22:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 328 transitions. [2025-03-17 14:22:51,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7540229885057471 [2025-03-17 14:22:51,907 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 289 flow. Second operand 5 states and 328 transitions. [2025-03-17 14:22:51,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 142 transitions, 663 flow [2025-03-17 14:22:51,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 142 transitions, 599 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:51,909 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 267 flow [2025-03-17 14:22:51,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2025-03-17 14:22:51,910 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 5 predicate places. [2025-03-17 14:22:51,910 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 267 flow [2025-03-17 14:22:51,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.4) internal successors, (252), 5 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) [2025-03-17 14:22:51,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:51,910 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:51,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:22:51,910 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:51,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:51,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1766280744, now seen corresponding path program 1 times [2025-03-17 14:22:51,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:51,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975287621] [2025-03-17 14:22:51,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:51,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:51,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:22:51,918 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:22:51,918 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:51,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:22:51,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:51,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975287621] [2025-03-17 14:22:51,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975287621] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:51,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:51,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:22:51,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861237584] [2025-03-17 14:22:51,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:51,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:22:51,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:51,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:22:51,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:22:51,984 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2025-03-17 14:22:51,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 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) [2025-03-17 14:22:51,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:51,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2025-03-17 14:22:51,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:52,306 INFO L124 PetriNetUnfolderBase]: 2519/4489 cut-off events. [2025-03-17 14:22:52,306 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2025-03-17 14:22:52,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8597 conditions, 4489 events. 2519/4489 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31147 event pairs, 1086 based on Foata normal form. 62/3428 useless extension candidates. Maximal degree in co-relation 5156. Up to 2117 conditions per place. [2025-03-17 14:22:52,322 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 87 selfloop transitions, 9 changer transitions 0/135 dead transitions. [2025-03-17 14:22:52,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 571 flow [2025-03-17 14:22:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:22:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:22:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 377 transitions. [2025-03-17 14:22:52,323 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2025-03-17 14:22:52,323 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 267 flow. Second operand 6 states and 377 transitions. [2025-03-17 14:22:52,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 571 flow [2025-03-17 14:22:52,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 566 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:22:52,327 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 316 flow [2025-03-17 14:22:52,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2025-03-17 14:22:52,327 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2025-03-17 14:22:52,327 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 316 flow [2025-03-17 14:22:52,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 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) [2025-03-17 14:22:52,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:52,328 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:52,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:22:52,328 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:52,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash -989821802, now seen corresponding path program 1 times [2025-03-17 14:22:52,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:52,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846072272] [2025-03-17 14:22:52,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:52,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:52,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:22:52,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:22:52,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:52,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:22:52,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:52,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846072272] [2025-03-17 14:22:52,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846072272] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:52,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:52,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:22:52,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058329327] [2025-03-17 14:22:52,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:52,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:22:52,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:52,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:22:52,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:22:52,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2025-03-17 14:22:52,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 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) [2025-03-17 14:22:52,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:52,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2025-03-17 14:22:52,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:52,698 INFO L124 PetriNetUnfolderBase]: 2095/3924 cut-off events. [2025-03-17 14:22:52,698 INFO L125 PetriNetUnfolderBase]: For 1226/1226 co-relation queries the response was YES. [2025-03-17 14:22:52,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7704 conditions, 3924 events. 2095/3924 cut-off events. For 1226/1226 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 27665 event pairs, 1126 based on Foata normal form. 82/2998 useless extension candidates. Maximal degree in co-relation 4698. Up to 2253 conditions per place. [2025-03-17 14:22:52,713 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 82 selfloop transitions, 8 changer transitions 0/129 dead transitions. [2025-03-17 14:22:52,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 129 transitions, 593 flow [2025-03-17 14:22:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:22:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:22:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 370 transitions. [2025-03-17 14:22:52,714 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7088122605363985 [2025-03-17 14:22:52,714 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 316 flow. Second operand 6 states and 370 transitions. [2025-03-17 14:22:52,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 129 transitions, 593 flow [2025-03-17 14:22:52,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 129 transitions, 589 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:22:52,716 INFO L231 Difference]: Finished difference. Result has 101 places, 96 transitions, 338 flow [2025-03-17 14:22:52,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2025-03-17 14:22:52,717 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2025-03-17 14:22:52,717 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 338 flow [2025-03-17 14:22:52,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 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) [2025-03-17 14:22:52,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:52,717 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:52,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:22:52,717 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:52,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash -293991618, now seen corresponding path program 1 times [2025-03-17 14:22:52,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:52,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156040398] [2025-03-17 14:22:52,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:52,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:22:52,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:22:52,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:52,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:22:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156040398] [2025-03-17 14:22:52,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156040398] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080026994] [2025-03-17 14:22:52,931 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:52,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:52,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:52,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:22:52,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:22:52,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:22:52,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:22:52,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:52,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:52,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:22:52,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:53,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:22:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:22:53,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:22:53,054 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-17 14:22:53,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-17 14:22:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:22:53,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:22:53,087 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:22:53,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:22:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:22:53,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:53,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2025-03-17 14:22:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:22:53,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080026994] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:53,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:53,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-03-17 14:22:53,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382207186] [2025-03-17 14:22:53,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:53,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:22:53,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:53,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:22:53,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:22:54,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2025-03-17 14:22:54,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 338 flow. Second operand has 16 states, 16 states have (on average 38.9375) internal successors, (623), 16 states have internal predecessors, (623), 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) [2025-03-17 14:22:54,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:54,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2025-03-17 14:22:54,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:55,206 INFO L124 PetriNetUnfolderBase]: 4809/9173 cut-off events. [2025-03-17 14:22:55,206 INFO L125 PetriNetUnfolderBase]: For 2421/2421 co-relation queries the response was YES. [2025-03-17 14:22:55,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17749 conditions, 9173 events. 4809/9173 cut-off events. For 2421/2421 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 73576 event pairs, 1570 based on Foata normal form. 0/6943 useless extension candidates. Maximal degree in co-relation 11467. Up to 2166 conditions per place. [2025-03-17 14:22:55,276 INFO L140 encePairwiseOnDemand]: 71/87 looper letters, 129 selfloop transitions, 25 changer transitions 0/184 dead transitions. [2025-03-17 14:22:55,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 184 transitions, 912 flow [2025-03-17 14:22:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 482 transitions. [2025-03-17 14:22:55,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6155810983397191 [2025-03-17 14:22:55,278 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 338 flow. Second operand 9 states and 482 transitions. [2025-03-17 14:22:55,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 184 transitions, 912 flow [2025-03-17 14:22:55,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 184 transitions, 894 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:22:55,282 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 451 flow [2025-03-17 14:22:55,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=451, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2025-03-17 14:22:55,284 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2025-03-17 14:22:55,284 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 451 flow [2025-03-17 14:22:55,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 38.9375) internal successors, (623), 16 states have internal predecessors, (623), 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) [2025-03-17 14:22:55,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:55,285 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:55,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:22:55,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:55,485 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:55,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2100919787, now seen corresponding path program 1 times [2025-03-17 14:22:55,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:55,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835244128] [2025-03-17 14:22:55,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:55,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:55,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:22:55,495 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:22:55,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:55,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:55,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:55,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835244128] [2025-03-17 14:22:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835244128] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:55,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:55,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:22:55,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440192110] [2025-03-17 14:22:55,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:55,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:22:55,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:55,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:22:55,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:22:55,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2025-03-17 14:22:55,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 451 flow. Second operand has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 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) [2025-03-17 14:22:55,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:55,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2025-03-17 14:22:55,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:55,920 INFO L124 PetriNetUnfolderBase]: 2697/5926 cut-off events. [2025-03-17 14:22:55,921 INFO L125 PetriNetUnfolderBase]: For 2693/2772 co-relation queries the response was YES. [2025-03-17 14:22:55,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11351 conditions, 5926 events. 2697/5926 cut-off events. For 2693/2772 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 49624 event pairs, 1694 based on Foata normal form. 74/4460 useless extension candidates. Maximal degree in co-relation 8786. Up to 3236 conditions per place. [2025-03-17 14:22:55,939 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 102 selfloop transitions, 4 changer transitions 0/141 dead transitions. [2025-03-17 14:22:55,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 783 flow [2025-03-17 14:22:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:22:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:22:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 320 transitions. [2025-03-17 14:22:55,940 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.735632183908046 [2025-03-17 14:22:55,940 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 451 flow. Second operand 5 states and 320 transitions. [2025-03-17 14:22:55,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 783 flow [2025-03-17 14:22:55,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 768 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 14:22:55,944 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 439 flow [2025-03-17 14:22:55,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=439, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2025-03-17 14:22:55,944 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 23 predicate places. [2025-03-17 14:22:55,944 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 439 flow [2025-03-17 14:22:55,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 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) [2025-03-17 14:22:55,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:55,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:55,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 14:22:55,945 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:55,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:55,945 INFO L85 PathProgramCache]: Analyzing trace with hash -983091331, now seen corresponding path program 1 times [2025-03-17 14:22:55,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:55,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720847137] [2025-03-17 14:22:55,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:55,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:55,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:22:55,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:22:55,953 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:55,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:22:55,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:55,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720847137] [2025-03-17 14:22:55,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720847137] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:55,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:55,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:22:55,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776616597] [2025-03-17 14:22:55,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:55,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:22:55,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:55,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:22:55,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:22:56,029 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2025-03-17 14:22:56,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 439 flow. Second operand has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 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) [2025-03-17 14:22:56,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:56,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2025-03-17 14:22:56,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:56,635 INFO L124 PetriNetUnfolderBase]: 3965/8849 cut-off events. [2025-03-17 14:22:56,636 INFO L125 PetriNetUnfolderBase]: For 4354/4400 co-relation queries the response was YES. [2025-03-17 14:22:56,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17554 conditions, 8849 events. 3965/8849 cut-off events. For 4354/4400 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 79160 event pairs, 2151 based on Foata normal form. 162/6967 useless extension candidates. Maximal degree in co-relation 14188. Up to 3690 conditions per place. [2025-03-17 14:22:56,677 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 99 selfloop transitions, 15 changer transitions 0/149 dead transitions. [2025-03-17 14:22:56,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 149 transitions, 853 flow [2025-03-17 14:22:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:22:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:22:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 321 transitions. [2025-03-17 14:22:56,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7379310344827587 [2025-03-17 14:22:56,679 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 439 flow. Second operand 5 states and 321 transitions. [2025-03-17 14:22:56,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 149 transitions, 853 flow [2025-03-17 14:22:56,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 149 transitions, 848 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:22:56,684 INFO L231 Difference]: Finished difference. Result has 111 places, 104 transitions, 488 flow [2025-03-17 14:22:56,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=488, PETRI_PLACES=111, PETRI_TRANSITIONS=104} [2025-03-17 14:22:56,685 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2025-03-17 14:22:56,685 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 104 transitions, 488 flow [2025-03-17 14:22:56,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 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) [2025-03-17 14:22:56,685 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:56,685 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:56,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 14:22:56,685 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:56,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:56,685 INFO L85 PathProgramCache]: Analyzing trace with hash -523804872, now seen corresponding path program 1 times [2025-03-17 14:22:56,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:56,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718193357] [2025-03-17 14:22:56,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:56,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:56,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:22:56,698 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:22:56,698 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:56,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 14:22:56,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:56,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718193357] [2025-03-17 14:22:56,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718193357] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:56,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:56,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:22:56,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728246254] [2025-03-17 14:22:56,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:56,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:22:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:56,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:22:56,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:22:56,796 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 87 [2025-03-17 14:22:56,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 104 transitions, 488 flow. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:56,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:56,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 87 [2025-03-17 14:22:56,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:57,290 INFO L124 PetriNetUnfolderBase]: 5166/9919 cut-off events. [2025-03-17 14:22:57,291 INFO L125 PetriNetUnfolderBase]: For 6180/6180 co-relation queries the response was YES. [2025-03-17 14:22:57,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 9919 events. 5166/9919 cut-off events. For 6180/6180 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 80909 event pairs, 3904 based on Foata normal form. 0/8607 useless extension candidates. Maximal degree in co-relation 15369. Up to 7450 conditions per place. [2025-03-17 14:22:57,318 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 59 selfloop transitions, 12 changer transitions 0/100 dead transitions. [2025-03-17 14:22:57,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 100 transitions, 622 flow [2025-03-17 14:22:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:22:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:22:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2025-03-17 14:22:57,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5563218390804597 [2025-03-17 14:22:57,319 INFO L175 Difference]: Start difference. First operand has 111 places, 104 transitions, 488 flow. Second operand 5 states and 242 transitions. [2025-03-17 14:22:57,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 100 transitions, 622 flow [2025-03-17 14:22:57,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 100 transitions, 613 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:22:57,324 INFO L231 Difference]: Finished difference. Result has 110 places, 100 transitions, 495 flow [2025-03-17 14:22:57,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=495, PETRI_PLACES=110, PETRI_TRANSITIONS=100} [2025-03-17 14:22:57,325 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 26 predicate places. [2025-03-17 14:22:57,325 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 100 transitions, 495 flow [2025-03-17 14:22:57,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:57,325 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:57,325 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:57,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 14:22:57,325 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:22:57,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash -523804871, now seen corresponding path program 1 times [2025-03-17 14:22:57,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:57,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539023092] [2025-03-17 14:22:57,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:57,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:57,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:22:57,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:22:57,334 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:57,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:22:57,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:57,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539023092] [2025-03-17 14:22:57,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539023092] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:57,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600640435] [2025-03-17 14:22:57,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:57,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:57,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:57,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:22:57,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:22:57,471 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:22:57,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:22:57,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:57,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:57,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:22:57,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:57,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:22:57,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:22:57,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:22:57,523 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:22:57,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:22:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:22:57,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:57,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-03-17 14:22:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:22:57,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600640435] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:57,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:57,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-03-17 14:22:57,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11932975] [2025-03-17 14:22:57,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:57,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:22:57,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:57,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:22:57,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:23:01,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:23:05,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:23:10,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:23:14,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:23:18,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:23:22,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:23:26,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:23:26,416 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2025-03-17 14:23:26,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 100 transitions, 495 flow. Second operand has 13 states, 13 states have (on average 38.92307692307692) internal successors, (506), 13 states have internal predecessors, (506), 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) [2025-03-17 14:23:26,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:26,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2025-03-17 14:23:26,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:27,183 INFO L124 PetriNetUnfolderBase]: 6203/10846 cut-off events. [2025-03-17 14:23:27,184 INFO L125 PetriNetUnfolderBase]: For 7101/7101 co-relation queries the response was YES. [2025-03-17 14:23:27,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24417 conditions, 10846 events. 6203/10846 cut-off events. For 7101/7101 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 82563 event pairs, 1956 based on Foata normal form. 0/9161 useless extension candidates. Maximal degree in co-relation 17931. Up to 3060 conditions per place. [2025-03-17 14:23:27,243 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 123 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2025-03-17 14:23:27,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 176 transitions, 1013 flow [2025-03-17 14:23:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:23:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:23:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 462 transitions. [2025-03-17 14:23:27,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5900383141762452 [2025-03-17 14:23:27,245 INFO L175 Difference]: Start difference. First operand has 110 places, 100 transitions, 495 flow. Second operand 9 states and 462 transitions. [2025-03-17 14:23:27,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 176 transitions, 1013 flow [2025-03-17 14:23:27,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 176 transitions, 993 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:27,255 INFO L231 Difference]: Finished difference. Result has 116 places, 102 transitions, 559 flow [2025-03-17 14:23:27,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=559, PETRI_PLACES=116, PETRI_TRANSITIONS=102} [2025-03-17 14:23:27,256 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2025-03-17 14:23:27,256 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 102 transitions, 559 flow [2025-03-17 14:23:27,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.92307692307692) internal successors, (506), 13 states have internal predecessors, (506), 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) [2025-03-17 14:23:27,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:27,256 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:27,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 14:23:27,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 14:23:27,457 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:23:27,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash -244354495, now seen corresponding path program 1 times [2025-03-17 14:23:27,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:27,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125427001] [2025-03-17 14:23:27,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:27,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:27,470 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:23:27,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:23:27,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:27,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:23:27,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:27,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125427001] [2025-03-17 14:23:27,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125427001] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:27,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:27,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:23:27,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474282589] [2025-03-17 14:23:27,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:27,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:27,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:27,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:27,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:27,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2025-03-17 14:23:27,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 102 transitions, 559 flow. Second operand has 5 states, 5 states have (on average 51.6) internal successors, (258), 5 states have internal predecessors, (258), 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) [2025-03-17 14:23:27,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:27,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2025-03-17 14:23:27,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:27,951 INFO L124 PetriNetUnfolderBase]: 3445/7054 cut-off events. [2025-03-17 14:23:27,952 INFO L125 PetriNetUnfolderBase]: For 7708/7812 co-relation queries the response was YES. [2025-03-17 14:23:27,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15987 conditions, 7054 events. 3445/7054 cut-off events. For 7708/7812 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 57087 event pairs, 2103 based on Foata normal form. 94/5845 useless extension candidates. Maximal degree in co-relation 10383. Up to 3667 conditions per place. [2025-03-17 14:23:27,990 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 94 selfloop transitions, 15 changer transitions 0/140 dead transitions. [2025-03-17 14:23:27,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 140 transitions, 977 flow [2025-03-17 14:23:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 314 transitions. [2025-03-17 14:23:27,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7218390804597701 [2025-03-17 14:23:27,991 INFO L175 Difference]: Start difference. First operand has 116 places, 102 transitions, 559 flow. Second operand 5 states and 314 transitions. [2025-03-17 14:23:27,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 140 transitions, 977 flow [2025-03-17 14:23:27,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 140 transitions, 910 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-03-17 14:23:27,999 INFO L231 Difference]: Finished difference. Result has 116 places, 104 transitions, 560 flow [2025-03-17 14:23:27,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=560, PETRI_PLACES=116, PETRI_TRANSITIONS=104} [2025-03-17 14:23:27,999 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2025-03-17 14:23:27,999 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 104 transitions, 560 flow [2025-03-17 14:23:27,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.6) internal successors, (258), 5 states have internal predecessors, (258), 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) [2025-03-17 14:23:27,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:27,999 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:27,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 14:23:28,000 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:23:28,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:28,000 INFO L85 PathProgramCache]: Analyzing trace with hash -953675527, now seen corresponding path program 1 times [2025-03-17 14:23:28,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:28,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523913594] [2025-03-17 14:23:28,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:28,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:28,008 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:23:28,013 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:23:28,013 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:28,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:28,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:28,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523913594] [2025-03-17 14:23:28,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523913594] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:28,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234913209] [2025-03-17 14:23:28,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:28,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:28,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:28,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:28,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:23:28,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:23:28,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:23:28,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:28,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:28,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:23:28,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:28,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:28,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:28,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:23:28,247 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:28,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:23:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:28,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:28,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-03-17 14:23:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:28,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234913209] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:28,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:28,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-03-17 14:23:28,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410547225] [2025-03-17 14:23:28,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:28,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:23:28,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:28,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:23:28,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:23:29,116 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 87 [2025-03-17 14:23:29,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 104 transitions, 560 flow. Second operand has 13 states, 13 states have (on average 45.38461538461539) internal successors, (590), 13 states have internal predecessors, (590), 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) [2025-03-17 14:23:29,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:29,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 87 [2025-03-17 14:23:29,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:30,097 INFO L124 PetriNetUnfolderBase]: 6971/13242 cut-off events. [2025-03-17 14:23:30,097 INFO L125 PetriNetUnfolderBase]: For 12979/13315 co-relation queries the response was YES. [2025-03-17 14:23:30,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29572 conditions, 13242 events. 6971/13242 cut-off events. For 12979/13315 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 111065 event pairs, 1847 based on Foata normal form. 0/10944 useless extension candidates. Maximal degree in co-relation 21942. Up to 3826 conditions per place. [2025-03-17 14:23:30,159 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 120 selfloop transitions, 27 changer transitions 0/175 dead transitions. [2025-03-17 14:23:30,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 175 transitions, 1130 flow [2025-03-17 14:23:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:23:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:23:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2025-03-17 14:23:30,161 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6424010217113666 [2025-03-17 14:23:30,161 INFO L175 Difference]: Start difference. First operand has 116 places, 104 transitions, 560 flow. Second operand 9 states and 503 transitions. [2025-03-17 14:23:30,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 175 transitions, 1130 flow [2025-03-17 14:23:30,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1108 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:30,174 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 610 flow [2025-03-17 14:23:30,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=610, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2025-03-17 14:23:30,174 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 39 predicate places. [2025-03-17 14:23:30,174 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 610 flow [2025-03-17 14:23:30,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.38461538461539) internal successors, (590), 13 states have internal predecessors, (590), 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) [2025-03-17 14:23:30,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:30,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:30,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:23:30,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:23:30,375 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:23:30,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash 500830448, now seen corresponding path program 1 times [2025-03-17 14:23:30,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:30,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398917599] [2025-03-17 14:23:30,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:30,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:30,382 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:23:30,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:23:30,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:30,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:30,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:30,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398917599] [2025-03-17 14:23:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398917599] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853002470] [2025-03-17 14:23:30,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:30,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:30,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:30,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:30,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:23:30,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:23:30,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:23:30,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:30,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:30,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:23:30,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:30,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:30,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-03-17 14:23:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853002470] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:30,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:30,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-03-17 14:23:30,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247083983] [2025-03-17 14:23:30,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:30,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:23:30,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:30,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:23:30,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:23:31,029 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 87 [2025-03-17 14:23:31,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 610 flow. Second operand has 11 states, 11 states have (on average 49.18181818181818) internal successors, (541), 11 states have internal predecessors, (541), 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) [2025-03-17 14:23:31,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:31,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 87 [2025-03-17 14:23:31,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:31,910 INFO L124 PetriNetUnfolderBase]: 6182/11581 cut-off events. [2025-03-17 14:23:31,910 INFO L125 PetriNetUnfolderBase]: For 14213/14479 co-relation queries the response was YES. [2025-03-17 14:23:31,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27631 conditions, 11581 events. 6182/11581 cut-off events. For 14213/14479 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 93614 event pairs, 2038 based on Foata normal form. 0/10532 useless extension candidates. Maximal degree in co-relation 20269. Up to 2955 conditions per place. [2025-03-17 14:23:31,961 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 116 selfloop transitions, 27 changer transitions 0/172 dead transitions. [2025-03-17 14:23:31,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 172 transitions, 1174 flow [2025-03-17 14:23:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:23:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:23:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 437 transitions. [2025-03-17 14:23:31,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7175697865353038 [2025-03-17 14:23:31,962 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 610 flow. Second operand 7 states and 437 transitions. [2025-03-17 14:23:31,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 172 transitions, 1174 flow [2025-03-17 14:23:31,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 172 transitions, 1124 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-03-17 14:23:31,973 INFO L231 Difference]: Finished difference. Result has 124 places, 105 transitions, 630 flow [2025-03-17 14:23:31,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=124, PETRI_TRANSITIONS=105} [2025-03-17 14:23:31,974 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 40 predicate places. [2025-03-17 14:23:31,974 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 105 transitions, 630 flow [2025-03-17 14:23:31,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 49.18181818181818) internal successors, (541), 11 states have internal predecessors, (541), 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) [2025-03-17 14:23:31,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:31,974 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:31,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:32,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:32,174 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:23:32,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:32,175 INFO L85 PathProgramCache]: Analyzing trace with hash 500830447, now seen corresponding path program 1 times [2025-03-17 14:23:32,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:32,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448387086] [2025-03-17 14:23:32,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:32,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:32,180 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:23:32,183 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:23:32,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:32,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:32,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:32,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448387086] [2025-03-17 14:23:32,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448387086] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:32,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:32,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998454507] [2025-03-17 14:23:32,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:32,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:32,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:32,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:32,248 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 87 [2025-03-17 14:23:32,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 105 transitions, 630 flow. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 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) [2025-03-17 14:23:32,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:32,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 87 [2025-03-17 14:23:32,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:32,888 INFO L124 PetriNetUnfolderBase]: 6740/12619 cut-off events. [2025-03-17 14:23:32,888 INFO L125 PetriNetUnfolderBase]: For 17701/18001 co-relation queries the response was YES. [2025-03-17 14:23:32,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31230 conditions, 12619 events. 6740/12619 cut-off events. For 17701/18001 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 102753 event pairs, 5366 based on Foata normal form. 300/11970 useless extension candidates. Maximal degree in co-relation 23597. Up to 9751 conditions per place. [2025-03-17 14:23:32,957 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 67 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2025-03-17 14:23:32,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 101 transitions, 774 flow [2025-03-17 14:23:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 205 transitions. [2025-03-17 14:23:32,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5890804597701149 [2025-03-17 14:23:32,958 INFO L175 Difference]: Start difference. First operand has 124 places, 105 transitions, 630 flow. Second operand 4 states and 205 transitions. [2025-03-17 14:23:32,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 101 transitions, 774 flow [2025-03-17 14:23:32,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 101 transitions, 722 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-03-17 14:23:32,968 INFO L231 Difference]: Finished difference. Result has 118 places, 101 transitions, 588 flow [2025-03-17 14:23:32,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=588, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2025-03-17 14:23:32,969 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 34 predicate places. [2025-03-17 14:23:32,969 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 588 flow [2025-03-17 14:23:32,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 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) [2025-03-17 14:23:32,969 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:32,969 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:32,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 14:23:32,970 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:23:32,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1054031804, now seen corresponding path program 1 times [2025-03-17 14:23:32,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:32,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523201357] [2025-03-17 14:23:32,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:32,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:32,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:23:32,983 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:32,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:32,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:23:33,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:33,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523201357] [2025-03-17 14:23:33,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523201357] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:33,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885237374] [2025-03-17 14:23:33,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:33,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:33,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:33,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:33,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:23:33,087 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:23:33,102 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:33,102 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:33,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:33,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:23:33,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:33,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:33,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885237374] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:33,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:33,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-03-17 14:23:33,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697161477] [2025-03-17 14:23:33,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:33,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:23:33,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:33,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:23:33,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:23:33,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2025-03-17 14:23:33,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 588 flow. Second operand has 16 states, 16 states have (on average 51.125) internal successors, (818), 16 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:33,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:33,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2025-03-17 14:23:33,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:35,682 INFO L124 PetriNetUnfolderBase]: 15624/28725 cut-off events. [2025-03-17 14:23:35,682 INFO L125 PetriNetUnfolderBase]: For 40185/41135 co-relation queries the response was YES. [2025-03-17 14:23:35,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71381 conditions, 28725 events. 15624/28725 cut-off events. For 40185/41135 co-relation queries the response was YES. Maximal size of possible extension queue 1147. Compared 260634 event pairs, 5670 based on Foata normal form. 444/26634 useless extension candidates. Maximal degree in co-relation 46631. Up to 6104 conditions per place. [2025-03-17 14:23:35,892 INFO L140 encePairwiseOnDemand]: 74/87 looper letters, 279 selfloop transitions, 63 changer transitions 0/369 dead transitions. [2025-03-17 14:23:35,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 369 transitions, 2611 flow [2025-03-17 14:23:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-17 14:23:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-03-17 14:23:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1690 transitions. [2025-03-17 14:23:35,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6698374950455807 [2025-03-17 14:23:35,895 INFO L175 Difference]: Start difference. First operand has 118 places, 101 transitions, 588 flow. Second operand 29 states and 1690 transitions. [2025-03-17 14:23:35,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 369 transitions, 2611 flow [2025-03-17 14:23:35,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 369 transitions, 2588 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:35,948 INFO L231 Difference]: Finished difference. Result has 153 places, 146 transitions, 1121 flow [2025-03-17 14:23:35,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1121, PETRI_PLACES=153, PETRI_TRANSITIONS=146} [2025-03-17 14:23:35,948 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 69 predicate places. [2025-03-17 14:23:35,948 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 146 transitions, 1121 flow [2025-03-17 14:23:35,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 51.125) internal successors, (818), 16 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:35,949 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:35,949 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:35,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:36,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:36,150 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:23:36,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:36,154 INFO L85 PathProgramCache]: Analyzing trace with hash -888978627, now seen corresponding path program 1 times [2025-03-17 14:23:36,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:36,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535525345] [2025-03-17 14:23:36,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:36,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:36,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:23:36,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:36,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:36,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:23:36,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:36,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535525345] [2025-03-17 14:23:36,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535525345] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:36,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275196125] [2025-03-17 14:23:36,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:36,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:36,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:36,394 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:36,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:23:36,442 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:23:36,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:23:36,461 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:36,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:36,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:23:36,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:36,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:36,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:36,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:23:36,528 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-17 14:23:36,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-17 14:23:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:36,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:23:36,551 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:36,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:23:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:36,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:36,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 156 [2025-03-17 14:23:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:36,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275196125] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:36,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:36,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2025-03-17 14:23:36,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907246886] [2025-03-17 14:23:36,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:36,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:23:36,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:36,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:23:36,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:23:40,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2025-03-17 14:23:40,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 146 transitions, 1121 flow. Second operand has 17 states, 17 states have (on average 39.1764705882353) internal successors, (666), 17 states have internal predecessors, (666), 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) [2025-03-17 14:23:40,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:40,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2025-03-17 14:23:40,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:45,572 INFO L124 PetriNetUnfolderBase]: 40102/69397 cut-off events. [2025-03-17 14:23:45,572 INFO L125 PetriNetUnfolderBase]: For 111756/114604 co-relation queries the response was YES. [2025-03-17 14:23:45,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170920 conditions, 69397 events. 40102/69397 cut-off events. For 111756/114604 co-relation queries the response was YES. Maximal size of possible extension queue 2607. Compared 661365 event pairs, 11189 based on Foata normal form. 0/63759 useless extension candidates. Maximal degree in co-relation 167192. Up to 20345 conditions per place. [2025-03-17 14:23:46,262 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 183 selfloop transitions, 41 changer transitions 0/245 dead transitions. [2025-03-17 14:23:46,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 245 transitions, 2160 flow [2025-03-17 14:23:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:23:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:23:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2025-03-17 14:23:46,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5836526181353767 [2025-03-17 14:23:46,264 INFO L175 Difference]: Start difference. First operand has 153 places, 146 transitions, 1121 flow. Second operand 9 states and 457 transitions. [2025-03-17 14:23:46,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 245 transitions, 2160 flow [2025-03-17 14:23:46,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 245 transitions, 2139 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:46,374 INFO L231 Difference]: Finished difference. Result has 159 places, 147 transitions, 1205 flow [2025-03-17 14:23:46,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1205, PETRI_PLACES=159, PETRI_TRANSITIONS=147} [2025-03-17 14:23:46,374 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 75 predicate places. [2025-03-17 14:23:46,374 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 147 transitions, 1205 flow [2025-03-17 14:23:46,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 39.1764705882353) internal successors, (666), 17 states have internal predecessors, (666), 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) [2025-03-17 14:23:46,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:46,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:46,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:46,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:46,579 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:23:46,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1788532930, now seen corresponding path program 1 times [2025-03-17 14:23:46,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:46,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69157783] [2025-03-17 14:23:46,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:46,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:46,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:23:46,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:23:46,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:46,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:23:46,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:46,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69157783] [2025-03-17 14:23:46,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69157783] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:46,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319316522] [2025-03-17 14:23:46,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:46,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:46,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:46,682 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:46,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:23:46,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:23:46,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:23:46,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:46,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:46,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:23:46,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:23:46,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:46,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-03-17 14:23:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:23:46,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319316522] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:46,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:46,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-03-17 14:23:46,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105744655] [2025-03-17 14:23:46,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:46,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:23:46,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:46,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:23:46,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:23:47,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 87 [2025-03-17 14:23:47,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 147 transitions, 1205 flow. Second operand has 11 states, 11 states have (on average 49.54545454545455) internal successors, (545), 11 states have internal predecessors, (545), 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) [2025-03-17 14:23:47,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:47,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 87 [2025-03-17 14:23:47,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:51,009 INFO L124 PetriNetUnfolderBase]: 27926/48443 cut-off events. [2025-03-17 14:23:51,010 INFO L125 PetriNetUnfolderBase]: For 102771/106388 co-relation queries the response was YES. [2025-03-17 14:23:51,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129058 conditions, 48443 events. 27926/48443 cut-off events. For 102771/106388 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 448495 event pairs, 9128 based on Foata normal form. 0/47142 useless extension candidates. Maximal degree in co-relation 125505. Up to 12918 conditions per place. [2025-03-17 14:23:51,394 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 169 selfloop transitions, 41 changer transitions 0/235 dead transitions. [2025-03-17 14:23:51,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 235 transitions, 2239 flow [2025-03-17 14:23:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:23:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:23:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 433 transitions. [2025-03-17 14:23:51,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7110016420361248 [2025-03-17 14:23:51,395 INFO L175 Difference]: Start difference. First operand has 159 places, 147 transitions, 1205 flow. Second operand 7 states and 433 transitions. [2025-03-17 14:23:51,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 235 transitions, 2239 flow [2025-03-17 14:23:51,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 235 transitions, 2169 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-03-17 14:23:51,490 INFO L231 Difference]: Finished difference. Result has 160 places, 147 transitions, 1236 flow [2025-03-17 14:23:51,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1236, PETRI_PLACES=160, PETRI_TRANSITIONS=147} [2025-03-17 14:23:51,490 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 76 predicate places. [2025-03-17 14:23:51,490 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 147 transitions, 1236 flow [2025-03-17 14:23:51,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 49.54545454545455) internal successors, (545), 11 states have internal predecessors, (545), 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) [2025-03-17 14:23:51,491 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:51,491 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:51,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:51,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-17 14:23:51,691 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:23:51,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash -475798273, now seen corresponding path program 1 times [2025-03-17 14:23:51,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:51,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783287546] [2025-03-17 14:23:51,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:51,697 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:23:51,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:23:51,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:51,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:51,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:51,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783287546] [2025-03-17 14:23:51,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783287546] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:51,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592682185] [2025-03-17 14:23:51,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:51,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:51,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:51,762 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:51,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:23:51,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:23:51,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:23:51,840 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:51,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:51,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:23:51,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:51,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:51,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592682185] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:51,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:51,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-03-17 14:23:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798724041] [2025-03-17 14:23:51,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:51,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:23:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:51,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:23:51,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:23:52,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2025-03-17 14:23:52,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 147 transitions, 1236 flow. Second operand has 16 states, 16 states have (on average 51.3125) internal successors, (821), 16 states have internal predecessors, (821), 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) [2025-03-17 14:23:52,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:52,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2025-03-17 14:23:52,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:57,995 INFO L124 PetriNetUnfolderBase]: 39280/70285 cut-off events. [2025-03-17 14:23:57,995 INFO L125 PetriNetUnfolderBase]: For 163821/169314 co-relation queries the response was YES. [2025-03-17 14:23:58,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194088 conditions, 70285 events. 39280/70285 cut-off events. For 163821/169314 co-relation queries the response was YES. Maximal size of possible extension queue 2827. Compared 707282 event pairs, 14654 based on Foata normal form. 1201/69288 useless extension candidates. Maximal degree in co-relation 185558. Up to 18363 conditions per place. [2025-03-17 14:23:58,548 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 292 selfloop transitions, 76 changer transitions 0/395 dead transitions. [2025-03-17 14:23:58,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 395 transitions, 3552 flow [2025-03-17 14:23:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 14:23:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 14:23:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1265 transitions. [2025-03-17 14:23:58,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.692391899288451 [2025-03-17 14:23:58,549 INFO L175 Difference]: Start difference. First operand has 160 places, 147 transitions, 1236 flow. Second operand 21 states and 1265 transitions. [2025-03-17 14:23:58,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 395 transitions, 3552 flow [2025-03-17 14:23:58,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 395 transitions, 3414 flow, removed 20 selfloop flow, removed 5 redundant places. [2025-03-17 14:23:58,734 INFO L231 Difference]: Finished difference. Result has 180 places, 165 transitions, 1540 flow [2025-03-17 14:23:58,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1540, PETRI_PLACES=180, PETRI_TRANSITIONS=165} [2025-03-17 14:23:58,737 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 96 predicate places. [2025-03-17 14:23:58,737 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 165 transitions, 1540 flow [2025-03-17 14:23:58,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 51.3125) internal successors, (821), 16 states have internal predecessors, (821), 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) [2025-03-17 14:23:58,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:58,737 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:58,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:58,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-17 14:23:58,938 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:23:58,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1180486083, now seen corresponding path program 1 times [2025-03-17 14:23:58,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:58,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000712174] [2025-03-17 14:23:58,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:58,944 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:23:58,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:23:58,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:58,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:23:58,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:58,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000712174] [2025-03-17 14:23:58,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000712174] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:58,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896879658] [2025-03-17 14:23:58,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:58,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:58,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:58,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:58,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:23:59,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:23:59,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:23:59,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:59,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:59,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:23:59,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:59,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:23:59,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896879658] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:59,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:59,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-03-17 14:23:59,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966293595] [2025-03-17 14:23:59,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:59,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:23:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:59,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:23:59,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:23:59,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2025-03-17 14:23:59,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 165 transitions, 1540 flow. Second operand has 16 states, 16 states have (on average 51.625) internal successors, (826), 16 states have internal predecessors, (826), 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) [2025-03-17 14:23:59,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:59,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2025-03-17 14:23:59,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:04,310 INFO L124 PetriNetUnfolderBase]: 30828/55194 cut-off events. [2025-03-17 14:24:04,310 INFO L125 PetriNetUnfolderBase]: For 161097/166350 co-relation queries the response was YES. [2025-03-17 14:24:04,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157664 conditions, 55194 events. 30828/55194 cut-off events. For 161097/166350 co-relation queries the response was YES. Maximal size of possible extension queue 2271. Compared 536468 event pairs, 12651 based on Foata normal form. 863/54440 useless extension candidates. Maximal degree in co-relation 149705. Up to 15957 conditions per place. [2025-03-17 14:24:04,732 INFO L140 encePairwiseOnDemand]: 74/87 looper letters, 303 selfloop transitions, 80 changer transitions 0/410 dead transitions. [2025-03-17 14:24:04,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 410 transitions, 4026 flow [2025-03-17 14:24:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 14:24:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 14:24:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1363 transitions. [2025-03-17 14:24:04,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2025-03-17 14:24:04,734 INFO L175 Difference]: Start difference. First operand has 180 places, 165 transitions, 1540 flow. Second operand 23 states and 1363 transitions. [2025-03-17 14:24:04,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 410 transitions, 4026 flow [2025-03-17 14:24:04,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 410 transitions, 3986 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:04,908 INFO L231 Difference]: Finished difference. Result has 203 places, 179 transitions, 1849 flow [2025-03-17 14:24:04,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1849, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2025-03-17 14:24:04,909 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 119 predicate places. [2025-03-17 14:24:04,909 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 1849 flow [2025-03-17 14:24:04,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 51.625) internal successors, (826), 16 states have internal predecessors, (826), 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) [2025-03-17 14:24:04,909 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:04,909 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:04,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:05,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-03-17 14:24:05,110 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-03-17 14:24:05,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1649022038, now seen corresponding path program 2 times [2025-03-17 14:24:05,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:05,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988550331] [2025-03-17 14:24:05,111 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:05,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:05,117 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 14:24:05,125 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:24:05,126 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:05,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:24:05,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:05,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988550331] [2025-03-17 14:24:05,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988550331] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:05,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908518420] [2025-03-17 14:24:05,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:05,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:05,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:05,417 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:05,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:24:05,467 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 14:24:05,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:24:05,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:05,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:05,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 14:24:05,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:05,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:24:05,566 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-03-17 14:24:05,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-03-17 14:24:05,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:24:05,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:24:05,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:24:05,643 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-03-17 14:24:05,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2025-03-17 14:24:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:24:05,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:05,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 156 [2025-03-17 14:24:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:24:06,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908518420] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:06,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:06,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2025-03-17 14:24:06,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915843040] [2025-03-17 14:24:06,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:06,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 14:24:06,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:06,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 14:24:06,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:24:09,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 87 [2025-03-17 14:24:09,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 1849 flow. Second operand has 26 states, 26 states have (on average 37.03846153846154) internal successors, (963), 26 states have internal predecessors, (963), 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) [2025-03-17 14:24:09,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:09,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 87 [2025-03-17 14:24:09,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand