./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:09:37,926 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:09:37,982 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:09:37,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:09:37,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:09:38,008 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:09:38,008 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:09:38,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:09:38,009 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:09:38,009 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:09:38,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:09:38,009 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:09:38,010 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:09:38,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:09:38,010 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:09:38,010 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:09:38,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:09:38,011 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:09:38,011 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-jdk21/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 -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2025-02-06 13:09:38,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:09:38,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:09:38,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:09:38,255 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:09:38,255 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:09:38,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2025-02-06 13:09:39,430 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d865ba866/b085386fb07044239586753d1d8de6f1/FLAG94c35f827 [2025-02-06 13:09:39,640 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:09:39,640 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2025-02-06 13:09:39,654 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d865ba866/b085386fb07044239586753d1d8de6f1/FLAG94c35f827 [2025-02-06 13:09:40,002 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d865ba866/b085386fb07044239586753d1d8de6f1 [2025-02-06 13:09:40,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:09:40,006 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:09:40,008 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:09:40,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:09:40,014 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:09:40,015 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,016 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f089df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40, skipping insertion in model container [2025-02-06 13:09:40,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,028 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:09:40,141 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:09:40,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:09:40,153 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:09:40,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:09:40,180 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:09:40,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40 WrapperNode [2025-02-06 13:09:40,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:09:40,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:09:40,182 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:09:40,182 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:09:40,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,190 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,205 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2025-02-06 13:09:40,206 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:09:40,206 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:09:40,206 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:09:40,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:09:40,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,217 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,233 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 13:09:40,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,241 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,245 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,246 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,250 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:09:40,251 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:09:40,251 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:09:40,251 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:09:40,255 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (1/1) ... [2025-02-06 13:09:40,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:09:40,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:40,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:09:40,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:09:40,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:09:40,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:09:40,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:09:40,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:09:40,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:09:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:09:40,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:09:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:09:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:09:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:09:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:09:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:09:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:09:40,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:09:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:09:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:09:40,304 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:09:40,376 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:09:40,378 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:09:40,688 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:09:40,688 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:09:40,817 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:09:40,817 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:09:40,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:09:40 BoogieIcfgContainer [2025-02-06 13:09:40,817 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:09:40,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:09:40,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:09:40,824 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:09:40,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:09:40" (1/3) ... [2025-02-06 13:09:40,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e44d776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:09:40, skipping insertion in model container [2025-02-06 13:09:40,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:09:40" (2/3) ... [2025-02-06 13:09:40,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e44d776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:09:40, skipping insertion in model container [2025-02-06 13:09:40,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:09:40" (3/3) ... [2025-02-06 13:09:40,826 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2025-02-06 13:09:40,837 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:09:40,838 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-sorted.wvr.c that has 4 procedures, 53 locations, 1 initial locations, 4 loop locations, and 16 error locations. [2025-02-06 13:09:40,839 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:09:40,902 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:09:40,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 59 transitions, 139 flow [2025-02-06 13:09:40,956 INFO L124 PetriNetUnfolderBase]: 7/56 cut-off events. [2025-02-06 13:09:40,957 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:09:40,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 7/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2025-02-06 13:09:40,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 59 transitions, 139 flow [2025-02-06 13:09:40,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 55 transitions, 128 flow [2025-02-06 13:09:40,969 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:09:40,979 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;@fc47e37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:09:40,980 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2025-02-06 13:09:40,982 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:09:40,983 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:09:40,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:09:40,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:40,985 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:09:40,985 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:40,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:40,989 INFO L85 PathProgramCache]: Analyzing trace with hash 395052, now seen corresponding path program 1 times [2025-02-06 13:09:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:40,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27231008] [2025-02-06 13:09:40,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:41,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:09:41,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:09:41,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:41,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:09:41,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27231008] [2025-02-06 13:09:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27231008] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:41,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:41,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:09:41,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514314982] [2025-02-06 13:09:41,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:41,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:09:41,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:41,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:09:41,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:09:41,244 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2025-02-06 13:09:41,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2025-02-06 13:09:41,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:41,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2025-02-06 13:09:41,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:41,494 INFO L124 PetriNetUnfolderBase]: 801/1520 cut-off events. [2025-02-06 13:09:41,494 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2025-02-06 13:09:41,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 1520 events. 801/1520 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8924 event pairs, 478 based on Foata normal form. 1/1082 useless extension candidates. Maximal degree in co-relation 2454. Up to 1082 conditions per place. [2025-02-06 13:09:41,505 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 27 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2025-02-06 13:09:41,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 180 flow [2025-02-06 13:09:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:09:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:09:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2025-02-06 13:09:41,516 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2025-02-06 13:09:41,517 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 128 flow. Second operand 3 states and 112 transitions. [2025-02-06 13:09:41,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 180 flow [2025-02-06 13:09:41,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 168 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:09:41,526 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 114 flow [2025-02-06 13:09:41,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2025-02-06 13:09:41,530 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2025-02-06 13:09:41,532 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 114 flow [2025-02-06 13:09:41,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2025-02-06 13:09:41,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:41,532 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:09:41,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:09:41,533 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:41,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash 395053, now seen corresponding path program 1 times [2025-02-06 13:09:41,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:41,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381536584] [2025-02-06 13:09:41,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:41,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:41,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:09:41,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:09:41,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:41,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:09:41,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:41,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381536584] [2025-02-06 13:09:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381536584] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:41,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:09:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628334650] [2025-02-06 13:09:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:41,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:09:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:41,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:09:41,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:09:41,809 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2025-02-06 13:09:41,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2025-02-06 13:09:41,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:41,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2025-02-06 13:09:41,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:41,985 INFO L124 PetriNetUnfolderBase]: 802/1523 cut-off events. [2025-02-06 13:09:41,985 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-06 13:09:41,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2642 conditions, 1523 events. 802/1523 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8977 event pairs, 478 based on Foata normal form. 0/1084 useless extension candidates. Maximal degree in co-relation 2620. Up to 1087 conditions per place. [2025-02-06 13:09:41,994 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 29 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2025-02-06 13:09:41,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 188 flow [2025-02-06 13:09:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:09:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:09:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2025-02-06 13:09:41,996 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016949152542372 [2025-02-06 13:09:41,997 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 114 flow. Second operand 4 states and 142 transitions. [2025-02-06 13:09:41,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 188 flow [2025-02-06 13:09:41,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:09:41,999 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 137 flow [2025-02-06 13:09:42,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2025-02-06 13:09:42,001 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2025-02-06 13:09:42,001 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 137 flow [2025-02-06 13:09:42,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2025-02-06 13:09:42,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:42,001 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:09:42,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:09:42,002 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:42,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:42,003 INFO L85 PathProgramCache]: Analyzing trace with hash 379658508, now seen corresponding path program 1 times [2025-02-06 13:09:42,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:42,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013780917] [2025-02-06 13:09:42,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:42,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:42,013 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:09:42,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:09:42,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:42,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:09:42,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:42,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013780917] [2025-02-06 13:09:42,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013780917] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:42,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969268357] [2025-02-06 13:09:42,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:42,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:42,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:42,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:42,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:09:42,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:09:42,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:09:42,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:42,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:42,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:09:42,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:42,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:09:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:09:42,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:09:42,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969268357] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:09:42,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:09:42,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:09:42,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798081376] [2025-02-06 13:09:42,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:09:42,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:09:42,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:42,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:09:42,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:09:42,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2025-02-06 13:09:42,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 137 flow. Second operand has 11 states, 11 states have (on average 28.363636363636363) internal successors, (312), 11 states have internal predecessors, (312), 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) [2025-02-06 13:09:42,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:42,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2025-02-06 13:09:42,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:43,149 INFO L124 PetriNetUnfolderBase]: 802/1522 cut-off events. [2025-02-06 13:09:43,149 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-06 13:09:43,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 1522 events. 802/1522 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8939 event pairs, 478 based on Foata normal form. 0/1083 useless extension candidates. Maximal degree in co-relation 2627. Up to 1083 conditions per place. [2025-02-06 13:09:43,157 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2025-02-06 13:09:43,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 197 flow [2025-02-06 13:09:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:09:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:09:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2025-02-06 13:09:43,159 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5508474576271186 [2025-02-06 13:09:43,159 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 137 flow. Second operand 6 states and 195 transitions. [2025-02-06 13:09:43,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 197 flow [2025-02-06 13:09:43,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:09:43,160 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 144 flow [2025-02-06 13:09:43,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2025-02-06 13:09:43,161 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2025-02-06 13:09:43,161 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 144 flow [2025-02-06 13:09:43,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.363636363636363) internal successors, (312), 11 states have internal predecessors, (312), 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) [2025-02-06 13:09:43,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:43,161 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:43,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 13:09:43,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:43,362 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:43,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:43,362 INFO L85 PathProgramCache]: Analyzing trace with hash -131012365, now seen corresponding path program 1 times [2025-02-06 13:09:43,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:43,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759964113] [2025-02-06 13:09:43,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:43,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:43,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:09:43,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:09:43,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:43,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:09:43,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:43,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759964113] [2025-02-06 13:09:43,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759964113] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:43,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:43,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:09:43,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919228814] [2025-02-06 13:09:43,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:43,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:09:43,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:43,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:09:43,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:09:43,459 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 59 [2025-02-06 13:09:43,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2025-02-06 13:09:43,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:43,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 59 [2025-02-06 13:09:43,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:43,634 INFO L124 PetriNetUnfolderBase]: 1371/2153 cut-off events. [2025-02-06 13:09:43,635 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-02-06 13:09:43,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4074 conditions, 2153 events. 1371/2153 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10462 event pairs, 893 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 4048. Up to 1859 conditions per place. [2025-02-06 13:09:43,645 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 32 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2025-02-06 13:09:43,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 202 flow [2025-02-06 13:09:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:09:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:09:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2025-02-06 13:09:43,646 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4661016949152542 [2025-02-06 13:09:43,646 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 144 flow. Second operand 4 states and 110 transitions. [2025-02-06 13:09:43,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 202 flow [2025-02-06 13:09:43,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 172 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-06 13:09:43,648 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 108 flow [2025-02-06 13:09:43,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2025-02-06 13:09:43,648 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2025-02-06 13:09:43,649 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 108 flow [2025-02-06 13:09:43,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2025-02-06 13:09:43,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:43,649 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:43,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:09:43,649 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:43,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:43,650 INFO L85 PathProgramCache]: Analyzing trace with hash -131012364, now seen corresponding path program 1 times [2025-02-06 13:09:43,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:43,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643640742] [2025-02-06 13:09:43,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:43,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:43,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:09:43,659 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:09:43,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:43,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:09:43,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:43,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643640742] [2025-02-06 13:09:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643640742] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:43,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:09:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554518823] [2025-02-06 13:09:43,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:43,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:09:43,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:43,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:09:43,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:09:43,718 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:09:43,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2025-02-06 13:09:43,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:43,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:09:43,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:43,855 INFO L124 PetriNetUnfolderBase]: 801/1397 cut-off events. [2025-02-06 13:09:43,856 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-06 13:09:43,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 1397 events. 801/1397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7303 event pairs, 478 based on Foata normal form. 1/1084 useless extension candidates. Maximal degree in co-relation 2496. Up to 1085 conditions per place. [2025-02-06 13:09:43,863 INFO L140 encePairwiseOnDemand]: 56/59 looper letters, 29 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2025-02-06 13:09:43,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 166 flow [2025-02-06 13:09:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:09:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:09:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2025-02-06 13:09:43,866 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.655367231638418 [2025-02-06 13:09:43,866 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 108 flow. Second operand 3 states and 116 transitions. [2025-02-06 13:09:43,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 166 flow [2025-02-06 13:09:43,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 163 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:09:43,867 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 105 flow [2025-02-06 13:09:43,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2025-02-06 13:09:43,867 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2025-02-06 13:09:43,867 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 105 flow [2025-02-06 13:09:43,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2025-02-06 13:09:43,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:43,868 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:43,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:09:43,869 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:43,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:43,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1243743405, now seen corresponding path program 1 times [2025-02-06 13:09:43,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:43,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27110829] [2025-02-06 13:09:43,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:43,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:43,876 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:09:43,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:09:43,882 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:43,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:09:43,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:43,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27110829] [2025-02-06 13:09:43,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27110829] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:43,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83414928] [2025-02-06 13:09:43,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:43,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:43,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:43,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:43,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:09:44,017 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:09:44,028 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:09:44,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:44,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:44,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:09:44,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:09:44,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:09:44,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83414928] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:09:44,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:09:44,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-06 13:09:44,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863073173] [2025-02-06 13:09:44,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:09:44,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:09:44,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:44,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:09:44,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:09:44,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:09:44,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 105 flow. Second operand has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 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) [2025-02-06 13:09:44,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:44,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:09:44,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:44,411 INFO L124 PetriNetUnfolderBase]: 1258/2172 cut-off events. [2025-02-06 13:09:44,411 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-02-06 13:09:44,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3961 conditions, 2172 events. 1258/2172 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12177 event pairs, 664 based on Foata normal form. 0/1736 useless extension candidates. Maximal degree in co-relation 3950. Up to 1084 conditions per place. [2025-02-06 13:09:44,419 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 63 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2025-02-06 13:09:44,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 87 transitions, 336 flow [2025-02-06 13:09:44,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:09:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:09:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2025-02-06 13:09:44,420 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.648910411622276 [2025-02-06 13:09:44,420 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 105 flow. Second operand 7 states and 268 transitions. [2025-02-06 13:09:44,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 87 transitions, 336 flow [2025-02-06 13:09:44,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:09:44,422 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 150 flow [2025-02-06 13:09:44,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2025-02-06 13:09:44,423 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2025-02-06 13:09:44,423 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 150 flow [2025-02-06 13:09:44,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 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) [2025-02-06 13:09:44,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:44,423 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:44,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 13:09:44,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:44,624 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:44,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:44,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1545596731, now seen corresponding path program 1 times [2025-02-06 13:09:44,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:44,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889663451] [2025-02-06 13:09:44,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:44,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:44,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:09:44,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:09:44,640 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:44,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:09:44,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:44,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889663451] [2025-02-06 13:09:44,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889663451] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:44,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113268060] [2025-02-06 13:09:44,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:44,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:44,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:44,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:44,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:09:44,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:09:44,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:09:44,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:44,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:44,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:09:44,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:09:44,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:09:44,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113268060] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:09:44,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:09:44,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-06 13:09:44,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297261840] [2025-02-06 13:09:44,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:09:44,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:09:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:44,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:09:44,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:09:44,895 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:09:44,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 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) [2025-02-06 13:09:44,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:44,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:09:44,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:45,162 INFO L124 PetriNetUnfolderBase]: 1023/1811 cut-off events. [2025-02-06 13:09:45,162 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2025-02-06 13:09:45,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3589 conditions, 1811 events. 1023/1811 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10023 event pairs, 578 based on Foata normal form. 0/1442 useless extension candidates. Maximal degree in co-relation 2649. Up to 1081 conditions per place. [2025-02-06 13:09:45,172 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 56 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2025-02-06 13:09:45,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 350 flow [2025-02-06 13:09:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:09:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:09:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2025-02-06 13:09:45,174 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6319612590799032 [2025-02-06 13:09:45,174 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 150 flow. Second operand 7 states and 261 transitions. [2025-02-06 13:09:45,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 350 flow [2025-02-06 13:09:45,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:09:45,176 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 179 flow [2025-02-06 13:09:45,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=179, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2025-02-06 13:09:45,178 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2025-02-06 13:09:45,178 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 179 flow [2025-02-06 13:09:45,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 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) [2025-02-06 13:09:45,178 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:45,179 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:45,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 13:09:45,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:45,383 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:45,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1131417102, now seen corresponding path program 2 times [2025-02-06 13:09:45,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:45,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782392772] [2025-02-06 13:09:45,383 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:09:45,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:45,390 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-06 13:09:45,395 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 11 statements. [2025-02-06 13:09:45,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:09:45,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:09:45,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:45,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782392772] [2025-02-06 13:09:45,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782392772] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:45,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:45,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:09:45,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418234177] [2025-02-06 13:09:45,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:45,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:09:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:45,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:09:45,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:09:45,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-06 13:09:45,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 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) [2025-02-06 13:09:45,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:45,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-06 13:09:45,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:45,906 INFO L124 PetriNetUnfolderBase]: 1747/2981 cut-off events. [2025-02-06 13:09:45,906 INFO L125 PetriNetUnfolderBase]: For 642/642 co-relation queries the response was YES. [2025-02-06 13:09:45,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6295 conditions, 2981 events. 1747/2981 cut-off events. For 642/642 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17234 event pairs, 691 based on Foata normal form. 62/2387 useless extension candidates. Maximal degree in co-relation 5197. Up to 1747 conditions per place. [2025-02-06 13:09:45,920 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 67 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2025-02-06 13:09:45,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 431 flow [2025-02-06 13:09:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:09:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:09:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2025-02-06 13:09:45,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6299435028248588 [2025-02-06 13:09:45,921 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 179 flow. Second operand 6 states and 223 transitions. [2025-02-06 13:09:45,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 431 flow [2025-02-06 13:09:45,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:09:45,924 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 213 flow [2025-02-06 13:09:45,925 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2025-02-06 13:09:45,925 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 7 predicate places. [2025-02-06 13:09:45,925 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 213 flow [2025-02-06 13:09:45,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 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) [2025-02-06 13:09:45,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:45,925 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:45,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:09:45,925 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:45,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:45,926 INFO L85 PathProgramCache]: Analyzing trace with hash -974201948, now seen corresponding path program 2 times [2025-02-06 13:09:45,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:45,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162560580] [2025-02-06 13:09:45,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:09:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:45,935 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:09:45,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 13 statements. [2025-02-06 13:09:45,941 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:09:45,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:09:46,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:46,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162560580] [2025-02-06 13:09:46,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162560580] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:46,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:46,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:09:46,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162803717] [2025-02-06 13:09:46,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:46,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:09:46,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:46,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:09:46,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:09:46,188 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-06 13:09:46,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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) [2025-02-06 13:09:46,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:46,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-06 13:09:46,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:46,528 INFO L124 PetriNetUnfolderBase]: 2787/4654 cut-off events. [2025-02-06 13:09:46,529 INFO L125 PetriNetUnfolderBase]: For 2838/2910 co-relation queries the response was YES. [2025-02-06 13:09:46,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11024 conditions, 4654 events. 2787/4654 cut-off events. For 2838/2910 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28566 event pairs, 1116 based on Foata normal form. 101/3861 useless extension candidates. Maximal degree in co-relation 9823. Up to 2697 conditions per place. [2025-02-06 13:09:46,550 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 74 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2025-02-06 13:09:46,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 539 flow [2025-02-06 13:09:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:09:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:09:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2025-02-06 13:09:46,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6242937853107344 [2025-02-06 13:09:46,551 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 213 flow. Second operand 6 states and 221 transitions. [2025-02-06 13:09:46,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 539 flow [2025-02-06 13:09:46,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 508 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-02-06 13:09:46,558 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 243 flow [2025-02-06 13:09:46,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2025-02-06 13:09:46,559 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2025-02-06 13:09:46,559 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 243 flow [2025-02-06 13:09:46,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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) [2025-02-06 13:09:46,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:46,559 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:46,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:09:46,560 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:46,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -67567845, now seen corresponding path program 1 times [2025-02-06 13:09:46,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:46,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688636201] [2025-02-06 13:09:46,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:46,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:46,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:09:46,570 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:09:46,570 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:46,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:09:46,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688636201] [2025-02-06 13:09:46,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688636201] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170393513] [2025-02-06 13:09:46,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:46,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:46,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:46,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:46,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:09:46,671 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:09:46,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:09:46,683 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:46,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:46,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:09:46,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:09:46,759 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:09:46,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170393513] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:09:46,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:09:46,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-06 13:09:46,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927352053] [2025-02-06 13:09:46,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:09:46,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:09:46,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:46,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:09:46,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:09:46,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:09:46,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 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) [2025-02-06 13:09:46,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:46,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:09:46,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:47,177 INFO L124 PetriNetUnfolderBase]: 2173/3912 cut-off events. [2025-02-06 13:09:47,177 INFO L125 PetriNetUnfolderBase]: For 3554/3610 co-relation queries the response was YES. [2025-02-06 13:09:47,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9815 conditions, 3912 events. 2173/3912 cut-off events. For 3554/3610 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25719 event pairs, 1186 based on Foata normal form. 0/3249 useless extension candidates. Maximal degree in co-relation 8981. Up to 2674 conditions per place. [2025-02-06 13:09:47,195 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 55 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2025-02-06 13:09:47,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 441 flow [2025-02-06 13:09:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:09:47,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:09:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 254 transitions. [2025-02-06 13:09:47,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6150121065375302 [2025-02-06 13:09:47,197 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 243 flow. Second operand 7 states and 254 transitions. [2025-02-06 13:09:47,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 441 flow [2025-02-06 13:09:47,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 424 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-06 13:09:47,202 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 259 flow [2025-02-06 13:09:47,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2025-02-06 13:09:47,204 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2025-02-06 13:09:47,204 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 259 flow [2025-02-06 13:09:47,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 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) [2025-02-06 13:09:47,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:47,204 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:47,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 13:09:47,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 13:09:47,409 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:47,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:47,410 INFO L85 PathProgramCache]: Analyzing trace with hash 857791958, now seen corresponding path program 1 times [2025-02-06 13:09:47,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:47,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366017227] [2025-02-06 13:09:47,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:47,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:47,414 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:09:47,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:09:47,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:47,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:47,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366017227] [2025-02-06 13:09:47,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366017227] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709312323] [2025-02-06 13:09:47,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:47,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:47,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:47,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:47,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:09:47,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:09:47,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:09:47,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:47,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:47,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:09:47,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:47,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:47,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709312323] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:09:47,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:09:47,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-02-06 13:09:47,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372021075] [2025-02-06 13:09:47,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:09:47,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:09:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:47,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:09:47,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:09:47,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:09:47,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 259 flow. Second operand has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 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) [2025-02-06 13:09:47,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:47,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:09:47,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:48,218 INFO L124 PetriNetUnfolderBase]: 3696/6554 cut-off events. [2025-02-06 13:09:48,219 INFO L125 PetriNetUnfolderBase]: For 4916/5038 co-relation queries the response was YES. [2025-02-06 13:09:48,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16441 conditions, 6554 events. 3696/6554 cut-off events. For 4916/5038 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45752 event pairs, 1497 based on Foata normal form. 0/5537 useless extension candidates. Maximal degree in co-relation 8896. Up to 2672 conditions per place. [2025-02-06 13:09:48,258 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 104 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2025-02-06 13:09:48,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 784 flow [2025-02-06 13:09:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:09:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:09:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 346 transitions. [2025-02-06 13:09:48,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6516007532956686 [2025-02-06 13:09:48,260 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 259 flow. Second operand 9 states and 346 transitions. [2025-02-06 13:09:48,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 784 flow [2025-02-06 13:09:48,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 769 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:09:48,270 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 346 flow [2025-02-06 13:09:48,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=346, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2025-02-06 13:09:48,271 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2025-02-06 13:09:48,271 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 346 flow [2025-02-06 13:09:48,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 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) [2025-02-06 13:09:48,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:48,271 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:48,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 13:09:48,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-06 13:09:48,472 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:48,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:48,472 INFO L85 PathProgramCache]: Analyzing trace with hash -712995270, now seen corresponding path program 2 times [2025-02-06 13:09:48,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:48,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812592769] [2025-02-06 13:09:48,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:09:48,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:48,478 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-06 13:09:48,485 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:09:48,485 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:09:48,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:09:48,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:48,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812592769] [2025-02-06 13:09:48,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812592769] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:48,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092128495] [2025-02-06 13:09:48,637 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:09:48,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:48,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:48,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:48,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:09:48,675 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-06 13:09:48,690 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:09:48,690 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:09:48,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:48,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 13:09:48,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:09:48,823 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:09:48,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092128495] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:48,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:09:48,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2025-02-06 13:09:48,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30984644] [2025-02-06 13:09:48,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:48,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:09:48,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:48,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:09:48,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:09:48,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-06 13:09:48,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 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) [2025-02-06 13:09:48,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:48,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-06 13:09:48,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:49,388 INFO L124 PetriNetUnfolderBase]: 3590/6220 cut-off events. [2025-02-06 13:09:49,388 INFO L125 PetriNetUnfolderBase]: For 8220/8278 co-relation queries the response was YES. [2025-02-06 13:09:49,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16998 conditions, 6220 events. 3590/6220 cut-off events. For 8220/8278 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 41906 event pairs, 966 based on Foata normal form. 242/5521 useless extension candidates. Maximal degree in co-relation 12668. Up to 2275 conditions per place. [2025-02-06 13:09:49,413 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 93 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2025-02-06 13:09:49,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 848 flow [2025-02-06 13:09:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:09:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:09:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2025-02-06 13:09:49,414 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016949152542372 [2025-02-06 13:09:49,414 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 346 flow. Second operand 6 states and 213 transitions. [2025-02-06 13:09:49,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 848 flow [2025-02-06 13:09:49,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 117 transitions, 829 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-02-06 13:09:49,426 INFO L231 Difference]: Finished difference. Result has 84 places, 67 transitions, 351 flow [2025-02-06 13:09:49,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2025-02-06 13:09:49,426 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 26 predicate places. [2025-02-06 13:09:49,426 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 351 flow [2025-02-06 13:09:49,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 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) [2025-02-06 13:09:49,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:49,427 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:49,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 13:09:49,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-06 13:09:49,627 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:49,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1354864209, now seen corresponding path program 1 times [2025-02-06 13:09:49,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:49,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336579830] [2025-02-06 13:09:49,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:49,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:49,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:09:49,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:09:49,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:49,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:49,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:49,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336579830] [2025-02-06 13:09:49,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336579830] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:49,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163465246] [2025-02-06 13:09:49,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:49,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:49,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:49,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:49,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:09:49,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:09:49,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:09:49,787 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:49,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:49,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:09:49,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:49,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:49,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163465246] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:09:49,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:09:49,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-06 13:09:49,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941618792] [2025-02-06 13:09:49,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:09:49,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 13:09:49,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:49,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 13:09:49,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:09:50,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:09:50,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 351 flow. Second operand has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 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) [2025-02-06 13:09:50,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:50,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:09:50,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:50,628 INFO L124 PetriNetUnfolderBase]: 3256/5494 cut-off events. [2025-02-06 13:09:50,628 INFO L125 PetriNetUnfolderBase]: For 7861/7973 co-relation queries the response was YES. [2025-02-06 13:09:50,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16184 conditions, 5494 events. 3256/5494 cut-off events. For 7861/7973 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 34822 event pairs, 1412 based on Foata normal form. 0/4753 useless extension candidates. Maximal degree in co-relation 12096. Up to 2672 conditions per place. [2025-02-06 13:09:50,656 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 96 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2025-02-06 13:09:50,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 857 flow [2025-02-06 13:09:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:09:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:09:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 344 transitions. [2025-02-06 13:09:50,657 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.647834274952919 [2025-02-06 13:09:50,657 INFO L175 Difference]: Start difference. First operand has 84 places, 67 transitions, 351 flow. Second operand 9 states and 344 transitions. [2025-02-06 13:09:50,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 857 flow [2025-02-06 13:09:50,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 809 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:09:50,670 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 403 flow [2025-02-06 13:09:50,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=403, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2025-02-06 13:09:50,671 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 32 predicate places. [2025-02-06 13:09:50,671 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 403 flow [2025-02-06 13:09:50,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 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) [2025-02-06 13:09:50,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:50,671 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:50,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 13:09:50,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:50,875 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:50,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1970589033, now seen corresponding path program 2 times [2025-02-06 13:09:50,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:50,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466438877] [2025-02-06 13:09:50,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:09:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:50,880 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:09:50,885 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:09:50,885 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:09:50,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-06 13:09:50,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:50,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466438877] [2025-02-06 13:09:50,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466438877] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:50,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:50,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:09:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375981271] [2025-02-06 13:09:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:50,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:09:50,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:50,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:09:50,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:09:50,931 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-06 13:09:50,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 403 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2025-02-06 13:09:50,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:50,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-06 13:09:50,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:51,536 INFO L124 PetriNetUnfolderBase]: 6600/10183 cut-off events. [2025-02-06 13:09:51,536 INFO L125 PetriNetUnfolderBase]: For 15730/15848 co-relation queries the response was YES. [2025-02-06 13:09:51,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30561 conditions, 10183 events. 6600/10183 cut-off events. For 15730/15848 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 63525 event pairs, 2550 based on Foata normal form. 0/8693 useless extension candidates. Maximal degree in co-relation 22024. Up to 5352 conditions per place. [2025-02-06 13:09:51,573 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 123 selfloop transitions, 10 changer transitions 0/145 dead transitions. [2025-02-06 13:09:51,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 145 transitions, 1022 flow [2025-02-06 13:09:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:09:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:09:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2025-02-06 13:09:51,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7322033898305085 [2025-02-06 13:09:51,574 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 403 flow. Second operand 5 states and 216 transitions. [2025-02-06 13:09:51,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 145 transitions, 1022 flow [2025-02-06 13:09:51,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 145 transitions, 994 flow, removed 7 selfloop flow, removed 5 redundant places. [2025-02-06 13:09:51,606 INFO L231 Difference]: Finished difference. Result has 93 places, 77 transitions, 467 flow [2025-02-06 13:09:51,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=467, PETRI_PLACES=93, PETRI_TRANSITIONS=77} [2025-02-06 13:09:51,606 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 35 predicate places. [2025-02-06 13:09:51,606 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 77 transitions, 467 flow [2025-02-06 13:09:51,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2025-02-06 13:09:51,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:51,607 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:51,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:09:51,607 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:51,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:51,607 INFO L85 PathProgramCache]: Analyzing trace with hash -714698192, now seen corresponding path program 2 times [2025-02-06 13:09:51,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:51,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081353370] [2025-02-06 13:09:51,608 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:09:51,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:51,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:09:51,616 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:09:51,617 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:09:51,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-06 13:09:51,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:51,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081353370] [2025-02-06 13:09:51,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081353370] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:51,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:51,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:09:51,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937392812] [2025-02-06 13:09:51,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:51,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:09:51,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:51,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:09:51,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:09:51,693 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-06 13:09:51,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 77 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2025-02-06 13:09:51,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:51,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-06 13:09:51,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:52,667 INFO L124 PetriNetUnfolderBase]: 9271/14078 cut-off events. [2025-02-06 13:09:52,667 INFO L125 PetriNetUnfolderBase]: For 28621/29357 co-relation queries the response was YES. [2025-02-06 13:09:52,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44340 conditions, 14078 events. 9271/14078 cut-off events. For 28621/29357 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 88073 event pairs, 4106 based on Foata normal form. 400/12843 useless extension candidates. Maximal degree in co-relation 31499. Up to 7952 conditions per place. [2025-02-06 13:09:52,742 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 138 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2025-02-06 13:09:52,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 161 transitions, 1251 flow [2025-02-06 13:09:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:09:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:09:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 212 transitions. [2025-02-06 13:09:52,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7186440677966102 [2025-02-06 13:09:52,743 INFO L175 Difference]: Start difference. First operand has 93 places, 77 transitions, 467 flow. Second operand 5 states and 212 transitions. [2025-02-06 13:09:52,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 161 transitions, 1251 flow [2025-02-06 13:09:52,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 161 transitions, 1243 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-02-06 13:09:52,792 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 547 flow [2025-02-06 13:09:52,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=547, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2025-02-06 13:09:52,792 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2025-02-06 13:09:52,792 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 547 flow [2025-02-06 13:09:52,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2025-02-06 13:09:52,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:52,793 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:52,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:09:52,793 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:52,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:52,793 INFO L85 PathProgramCache]: Analyzing trace with hash -620406020, now seen corresponding path program 1 times [2025-02-06 13:09:52,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:52,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012307509] [2025-02-06 13:09:52,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:52,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:52,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:09:52,804 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:09:52,804 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:52,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:09:52,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:53,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012307509] [2025-02-06 13:09:53,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012307509] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:53,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117587166] [2025-02-06 13:09:53,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:53,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:53,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:53,002 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:53,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:09:53,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:09:53,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:09:53,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:53,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:53,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:09:53,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:09:53,144 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:09:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117587166] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:53,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:09:53,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2025-02-06 13:09:53,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384233661] [2025-02-06 13:09:53,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:53,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:09:53,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:53,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:09:53,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:09:53,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-06 13:09:53,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 547 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 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) [2025-02-06 13:09:53,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:53,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-06 13:09:53,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:54,296 INFO L124 PetriNetUnfolderBase]: 7399/11867 cut-off events. [2025-02-06 13:09:54,296 INFO L125 PetriNetUnfolderBase]: For 24883/25519 co-relation queries the response was YES. [2025-02-06 13:09:54,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40109 conditions, 11867 events. 7399/11867 cut-off events. For 24883/25519 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 79629 event pairs, 1544 based on Foata normal form. 434/11585 useless extension candidates. Maximal degree in co-relation 28132. Up to 3411 conditions per place. [2025-02-06 13:09:54,356 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 158 selfloop transitions, 20 changer transitions 0/192 dead transitions. [2025-02-06 13:09:54,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 192 transitions, 1557 flow [2025-02-06 13:09:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:09:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:09:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 305 transitions. [2025-02-06 13:09:54,358 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6461864406779662 [2025-02-06 13:09:54,358 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 547 flow. Second operand 8 states and 305 transitions. [2025-02-06 13:09:54,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 192 transitions, 1557 flow [2025-02-06 13:09:54,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 192 transitions, 1547 flow, removed 5 selfloop flow, removed 0 redundant places. [2025-02-06 13:09:54,524 INFO L231 Difference]: Finished difference. Result has 107 places, 85 transitions, 595 flow [2025-02-06 13:09:54,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=595, PETRI_PLACES=107, PETRI_TRANSITIONS=85} [2025-02-06 13:09:54,525 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 49 predicate places. [2025-02-06 13:09:54,525 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 85 transitions, 595 flow [2025-02-06 13:09:54,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 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) [2025-02-06 13:09:54,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:54,525 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:54,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 13:09:54,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 13:09:54,730 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:54,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:54,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2052717102, now seen corresponding path program 1 times [2025-02-06 13:09:54,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:54,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494332549] [2025-02-06 13:09:54,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:54,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:54,739 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:09:54,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:09:54,743 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:54,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:09:54,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:54,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494332549] [2025-02-06 13:09:54,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494332549] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:54,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123987974] [2025-02-06 13:09:54,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:54,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:54,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:54,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:54,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:09:54,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:09:54,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:09:54,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:54,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:54,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:09:54,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:54,993 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 [2025-02-06 13:09:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:09:55,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:09:55,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123987974] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:09:55,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:09:55,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2025-02-06 13:09:55,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638202366] [2025-02-06 13:09:55,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:09:55,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 13:09:55,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:55,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 13:09:55,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-02-06 13:09:55,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2025-02-06 13:09:55,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 85 transitions, 595 flow. Second operand has 26 states, 26 states have (on average 23.96153846153846) internal successors, (623), 26 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) [2025-02-06 13:09:55,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:55,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2025-02-06 13:09:55,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:57,431 INFO L124 PetriNetUnfolderBase]: 14597/21779 cut-off events. [2025-02-06 13:09:57,431 INFO L125 PetriNetUnfolderBase]: For 51796/52516 co-relation queries the response was YES. [2025-02-06 13:09:57,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75077 conditions, 21779 events. 14597/21779 cut-off events. For 51796/52516 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 134310 event pairs, 5322 based on Foata normal form. 696/21501 useless extension candidates. Maximal degree in co-relation 59374. Up to 7700 conditions per place. [2025-02-06 13:09:57,555 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 177 selfloop transitions, 20 changer transitions 0/208 dead transitions. [2025-02-06 13:09:57,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 208 transitions, 1569 flow [2025-02-06 13:09:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:09:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:09:57,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 392 transitions. [2025-02-06 13:09:57,557 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6040061633281972 [2025-02-06 13:09:57,557 INFO L175 Difference]: Start difference. First operand has 107 places, 85 transitions, 595 flow. Second operand 11 states and 392 transitions. [2025-02-06 13:09:57,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 208 transitions, 1569 flow [2025-02-06 13:09:57,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 208 transitions, 1532 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-02-06 13:09:57,683 INFO L231 Difference]: Finished difference. Result has 116 places, 92 transitions, 682 flow [2025-02-06 13:09:57,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=682, PETRI_PLACES=116, PETRI_TRANSITIONS=92} [2025-02-06 13:09:57,683 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 58 predicate places. [2025-02-06 13:09:57,683 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 92 transitions, 682 flow [2025-02-06 13:09:57,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.96153846153846) internal successors, (623), 26 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) [2025-02-06 13:09:57,684 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:57,684 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:57,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 13:09:57,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:57,884 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:09:57,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:57,885 INFO L85 PathProgramCache]: Analyzing trace with hash -594195051, now seen corresponding path program 1 times [2025-02-06 13:09:57,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:57,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806746728] [2025-02-06 13:09:57,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:57,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:57,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:09:57,894 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:09:57,894 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:57,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:09:58,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:58,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806746728] [2025-02-06 13:09:58,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806746728] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:58,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428184425] [2025-02-06 13:09:58,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:58,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:58,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:58,079 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:58,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:09:58,121 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:09:58,138 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:09:58,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:58,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:58,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:09:58,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:09:58,236 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:09:58,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428184425] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:58,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:09:58,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2025-02-06 13:09:58,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861328670] [2025-02-06 13:09:58,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:58,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:09:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:58,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:09:58,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:09:58,309 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-06 13:09:58,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 92 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 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) [2025-02-06 13:09:58,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:58,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-06 13:09:58,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:59,675 INFO L124 PetriNetUnfolderBase]: 9917/15554 cut-off events. [2025-02-06 13:09:59,675 INFO L125 PetriNetUnfolderBase]: For 50259/50461 co-relation queries the response was YES. [2025-02-06 13:09:59,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56447 conditions, 15554 events. 9917/15554 cut-off events. For 50259/50461 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 102327 event pairs, 1714 based on Foata normal form. 228/15027 useless extension candidates. Maximal degree in co-relation 44025. Up to 4749 conditions per place. [2025-02-06 13:09:59,787 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 202 selfloop transitions, 20 changer transitions 0/235 dead transitions. [2025-02-06 13:09:59,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 235 transitions, 2227 flow [2025-02-06 13:09:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:09:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:09:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 301 transitions. [2025-02-06 13:09:59,789 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6377118644067796 [2025-02-06 13:09:59,789 INFO L175 Difference]: Start difference. First operand has 116 places, 92 transitions, 682 flow. Second operand 8 states and 301 transitions. [2025-02-06 13:09:59,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 235 transitions, 2227 flow [2025-02-06 13:09:59,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 235 transitions, 2117 flow, removed 27 selfloop flow, removed 7 redundant places. [2025-02-06 13:09:59,999 INFO L231 Difference]: Finished difference. Result has 115 places, 94 transitions, 690 flow [2025-02-06 13:09:59,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=690, PETRI_PLACES=115, PETRI_TRANSITIONS=94} [2025-02-06 13:09:59,999 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 57 predicate places. [2025-02-06 13:09:59,999 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 94 transitions, 690 flow [2025-02-06 13:09:59,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 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) [2025-02-06 13:09:59,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:59,999 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:00,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:00,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 13:10:00,200 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:10:00,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:00,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1240177051, now seen corresponding path program 1 times [2025-02-06 13:10:00,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:00,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763570368] [2025-02-06 13:10:00,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:00,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:00,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:00,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:00,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:00,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-06 13:10:00,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:00,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763570368] [2025-02-06 13:10:00,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763570368] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:00,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628259274] [2025-02-06 13:10:00,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:00,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:00,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:00,414 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:00,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 13:10:00,461 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:00,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:00,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:00,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:00,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:10:00,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:00,486 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 [2025-02-06 13:10:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:00,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:00,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628259274] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:00,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:00,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2025-02-06 13:10:00,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931619198] [2025-02-06 13:10:00,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:00,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 13:10:00,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:00,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 13:10:00,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-02-06 13:10:01,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2025-02-06 13:10:01,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 94 transitions, 690 flow. Second operand has 23 states, 23 states have (on average 25.347826086956523) internal successors, (583), 23 states have internal predecessors, (583), 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) [2025-02-06 13:10:01,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:01,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2025-02-06 13:10:01,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:03,709 INFO L124 PetriNetUnfolderBase]: 19593/29291 cut-off events. [2025-02-06 13:10:03,709 INFO L125 PetriNetUnfolderBase]: For 87742/87742 co-relation queries the response was YES. [2025-02-06 13:10:03,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106222 conditions, 29291 events. 19593/29291 cut-off events. For 87742/87742 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 186550 event pairs, 4222 based on Foata normal form. 556/28641 useless extension candidates. Maximal degree in co-relation 89797. Up to 6790 conditions per place. [2025-02-06 13:10:03,877 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 250 selfloop transitions, 26 changer transitions 0/286 dead transitions. [2025-02-06 13:10:03,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 286 transitions, 2394 flow [2025-02-06 13:10:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:10:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:10:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 500 transitions. [2025-02-06 13:10:03,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6053268765133172 [2025-02-06 13:10:03,878 INFO L175 Difference]: Start difference. First operand has 115 places, 94 transitions, 690 flow. Second operand 14 states and 500 transitions. [2025-02-06 13:10:03,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 286 transitions, 2394 flow [2025-02-06 13:10:04,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 286 transitions, 2347 flow, removed 8 selfloop flow, removed 5 redundant places. [2025-02-06 13:10:04,210 INFO L231 Difference]: Finished difference. Result has 127 places, 103 transitions, 808 flow [2025-02-06 13:10:04,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=808, PETRI_PLACES=127, PETRI_TRANSITIONS=103} [2025-02-06 13:10:04,211 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 69 predicate places. [2025-02-06 13:10:04,211 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 103 transitions, 808 flow [2025-02-06 13:10:04,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 25.347826086956523) internal successors, (583), 23 states have internal predecessors, (583), 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) [2025-02-06 13:10:04,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:04,211 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:04,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 13:10:04,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:04,411 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:10:04,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2096764639, now seen corresponding path program 1 times [2025-02-06 13:10:04,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:04,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620659206] [2025-02-06 13:10:04,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:04,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:04,424 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:04,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:04,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:10:04,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:04,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620659206] [2025-02-06 13:10:04,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620659206] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:04,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:04,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:10:04,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570321025] [2025-02-06 13:10:04,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:04,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:10:04,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:04,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:10:04,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:10:04,488 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:10:04,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 103 transitions, 808 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2025-02-06 13:10:04,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:04,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:10:04,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:05,899 INFO L124 PetriNetUnfolderBase]: 13939/21817 cut-off events. [2025-02-06 13:10:05,899 INFO L125 PetriNetUnfolderBase]: For 88690/88786 co-relation queries the response was YES. [2025-02-06 13:10:05,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84257 conditions, 21817 events. 13939/21817 cut-off events. For 88690/88786 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 147204 event pairs, 2902 based on Foata normal form. 3/20650 useless extension candidates. Maximal degree in co-relation 69469. Up to 16656 conditions per place. [2025-02-06 13:10:06,084 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 104 selfloop transitions, 11 changer transitions 8/138 dead transitions. [2025-02-06 13:10:06,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 138 transitions, 1304 flow [2025-02-06 13:10:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:10:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:10:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2025-02-06 13:10:06,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7740112994350282 [2025-02-06 13:10:06,088 INFO L175 Difference]: Start difference. First operand has 127 places, 103 transitions, 808 flow. Second operand 3 states and 137 transitions. [2025-02-06 13:10:06,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 138 transitions, 1304 flow [2025-02-06 13:10:06,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 138 transitions, 1257 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-02-06 13:10:06,203 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 832 flow [2025-02-06 13:10:06,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=832, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2025-02-06 13:10:06,204 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 65 predicate places. [2025-02-06 13:10:06,204 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 832 flow [2025-02-06 13:10:06,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2025-02-06 13:10:06,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:06,204 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2025-02-06 13:10:06,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-06 13:10:06,204 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:10:06,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 415897533, now seen corresponding path program 2 times [2025-02-06 13:10:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594980176] [2025-02-06 13:10:06,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:06,208 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:10:06,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:10:06,213 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:06,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:06,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:06,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594980176] [2025-02-06 13:10:06,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594980176] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:06,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107088907] [2025-02-06 13:10:06,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:06,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:06,304 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:06,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 13:10:06,342 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:10:06,358 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:10:06,358 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:06,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:06,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 13:10:06,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:06,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:06,547 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 13 treesize of output 11 [2025-02-06 13:10:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:06,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107088907] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:06,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:06,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2025-02-06 13:10:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785427123] [2025-02-06 13:10:06,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:06,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 13:10:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:06,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 13:10:06,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2025-02-06 13:10:06,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2025-02-06 13:10:06,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 832 flow. Second operand has 26 states, 26 states have (on average 27.076923076923077) internal successors, (704), 26 states have internal predecessors, (704), 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) [2025-02-06 13:10:06,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:06,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2025-02-06 13:10:06,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:10,475 INFO L124 PetriNetUnfolderBase]: 27399/41052 cut-off events. [2025-02-06 13:10:10,475 INFO L125 PetriNetUnfolderBase]: For 166145/166145 co-relation queries the response was YES. [2025-02-06 13:10:10,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161424 conditions, 41052 events. 27399/41052 cut-off events. For 166145/166145 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 283932 event pairs, 9618 based on Foata normal form. 388/39266 useless extension candidates. Maximal degree in co-relation 144674. Up to 15082 conditions per place. [2025-02-06 13:10:10,857 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 400 selfloop transitions, 40 changer transitions 0/453 dead transitions. [2025-02-06 13:10:10,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 453 transitions, 4411 flow [2025-02-06 13:10:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 13:10:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 13:10:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 603 transitions. [2025-02-06 13:10:10,859 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.638771186440678 [2025-02-06 13:10:10,859 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 832 flow. Second operand 16 states and 603 transitions. [2025-02-06 13:10:10,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 453 transitions, 4411 flow [2025-02-06 13:10:11,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 453 transitions, 4245 flow, removed 68 selfloop flow, removed 7 redundant places. [2025-02-06 13:10:11,366 INFO L231 Difference]: Finished difference. Result has 132 places, 123 transitions, 1137 flow [2025-02-06 13:10:11,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1137, PETRI_PLACES=132, PETRI_TRANSITIONS=123} [2025-02-06 13:10:11,367 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 74 predicate places. [2025-02-06 13:10:11,367 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 123 transitions, 1137 flow [2025-02-06 13:10:11,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 27.076923076923077) internal successors, (704), 26 states have internal predecessors, (704), 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) [2025-02-06 13:10:11,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:11,368 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2025-02-06 13:10:11,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 13:10:11,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:11,568 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:10:11,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:11,569 INFO L85 PathProgramCache]: Analyzing trace with hash -20566210, now seen corresponding path program 3 times [2025-02-06 13:10:11,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:11,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982278590] [2025-02-06 13:10:11,569 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:10:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:11,575 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 6 equivalence classes. [2025-02-06 13:10:11,579 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 26 statements. [2025-02-06 13:10:11,579 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:10:11,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-06 13:10:11,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:11,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982278590] [2025-02-06 13:10:11,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982278590] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:11,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272635028] [2025-02-06 13:10:11,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:10:11,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:11,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:11,662 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:11,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 13:10:11,706 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 6 equivalence classes. [2025-02-06 13:10:11,719 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 26 statements. [2025-02-06 13:10:11,719 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:10:11,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:11,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:10:11,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:11,726 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 [2025-02-06 13:10:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-06 13:10:11,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-06 13:10:11,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272635028] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:11,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:11,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-06 13:10:11,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013511824] [2025-02-06 13:10:11,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:11,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:10:11,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:11,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:10:11,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:10:12,165 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2025-02-06 13:10:12,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 123 transitions, 1137 flow. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 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) [2025-02-06 13:10:12,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:12,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2025-02-06 13:10:12,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:16,716 INFO L124 PetriNetUnfolderBase]: 36679/55195 cut-off events. [2025-02-06 13:10:16,716 INFO L125 PetriNetUnfolderBase]: For 262078/262078 co-relation queries the response was YES. [2025-02-06 13:10:17,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218067 conditions, 55195 events. 36679/55195 cut-off events. For 262078/262078 co-relation queries the response was YES. Maximal size of possible extension queue 1372. Compared 395080 event pairs, 12299 based on Foata normal form. 268/53249 useless extension candidates. Maximal degree in co-relation 185934. Up to 26967 conditions per place. [2025-02-06 13:10:17,262 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 178 selfloop transitions, 29 changer transitions 0/216 dead transitions. [2025-02-06 13:10:17,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 216 transitions, 2255 flow [2025-02-06 13:10:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:10:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:10:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 206 transitions. [2025-02-06 13:10:17,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5819209039548022 [2025-02-06 13:10:17,263 INFO L175 Difference]: Start difference. First operand has 132 places, 123 transitions, 1137 flow. Second operand 6 states and 206 transitions. [2025-02-06 13:10:17,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 216 transitions, 2255 flow [2025-02-06 13:10:19,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 216 transitions, 2219 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-02-06 13:10:19,064 INFO L231 Difference]: Finished difference. Result has 132 places, 122 transitions, 1153 flow [2025-02-06 13:10:19,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1153, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2025-02-06 13:10:19,066 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 74 predicate places. [2025-02-06 13:10:19,066 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 1153 flow [2025-02-06 13:10:19,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 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) [2025-02-06 13:10:19,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:19,067 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:19,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:19,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:19,267 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:10:19,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1573789176, now seen corresponding path program 1 times [2025-02-06 13:10:19,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:19,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490406855] [2025-02-06 13:10:19,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:19,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:19,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 13:10:19,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:10:19,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:19,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:19,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:19,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490406855] [2025-02-06 13:10:19,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490406855] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:19,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047953351] [2025-02-06 13:10:19,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:19,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:19,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:19,359 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:19,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 13:10:19,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 13:10:19,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:10:19,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:19,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:19,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:10:19,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:19,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:19,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047953351] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:19,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:19,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 16 [2025-02-06 13:10:19,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581199467] [2025-02-06 13:10:19,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:19,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:10:19,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:19,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:10:19,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:10:19,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:10:19,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 1153 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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) [2025-02-06 13:10:19,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:19,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:10:19,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:22,716 INFO L124 PetriNetUnfolderBase]: 20989/36170 cut-off events. [2025-02-06 13:10:22,716 INFO L125 PetriNetUnfolderBase]: For 195614/195614 co-relation queries the response was YES. [2025-02-06 13:10:22,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136706 conditions, 36170 events. 20989/36170 cut-off events. For 195614/195614 co-relation queries the response was YES. Maximal size of possible extension queue 1218. Compared 303679 event pairs, 6861 based on Foata normal form. 0/33191 useless extension candidates. Maximal degree in co-relation 114525. Up to 14979 conditions per place. [2025-02-06 13:10:22,965 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 365 selfloop transitions, 37 changer transitions 0/416 dead transitions. [2025-02-06 13:10:22,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 416 transitions, 5246 flow [2025-02-06 13:10:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:10:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:10:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 381 transitions. [2025-02-06 13:10:22,966 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6457627118644068 [2025-02-06 13:10:22,966 INFO L175 Difference]: Start difference. First operand has 132 places, 122 transitions, 1153 flow. Second operand 10 states and 381 transitions. [2025-02-06 13:10:22,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 416 transitions, 5246 flow [2025-02-06 13:10:23,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 416 transitions, 4948 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:10:23,397 INFO L231 Difference]: Finished difference. Result has 138 places, 142 transitions, 1339 flow [2025-02-06 13:10:23,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1339, PETRI_PLACES=138, PETRI_TRANSITIONS=142} [2025-02-06 13:10:23,398 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 80 predicate places. [2025-02-06 13:10:23,398 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 142 transitions, 1339 flow [2025-02-06 13:10:23,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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) [2025-02-06 13:10:23,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:23,398 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:23,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:23,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-06 13:10:23,598 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:10:23,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash 846398634, now seen corresponding path program 2 times [2025-02-06 13:10:23,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:23,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847295514] [2025-02-06 13:10:23,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:23,603 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 13:10:23,608 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:10:23,609 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:23,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:10:23,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:23,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847295514] [2025-02-06 13:10:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847295514] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:23,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783367495] [2025-02-06 13:10:23,646 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:23,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:23,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:23,648 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:23,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 13:10:23,690 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 13:10:23,711 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:10:23,711 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:23,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:23,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:10:23,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:23,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783367495] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:23,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:23,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2025-02-06 13:10:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540764413] [2025-02-06 13:10:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:23,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:10:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:23,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:10:23,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:10:23,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:10:23,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 142 transitions, 1339 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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) [2025-02-06 13:10:23,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:23,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:10:23,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:28,125 INFO L124 PetriNetUnfolderBase]: 29515/48295 cut-off events. [2025-02-06 13:10:28,125 INFO L125 PetriNetUnfolderBase]: For 279461/279461 co-relation queries the response was YES. [2025-02-06 13:10:28,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197535 conditions, 48295 events. 29515/48295 cut-off events. For 279461/279461 co-relation queries the response was YES. Maximal size of possible extension queue 1461. Compared 393810 event pairs, 4974 based on Foata normal form. 92/47422 useless extension candidates. Maximal degree in co-relation 165002. Up to 11009 conditions per place. [2025-02-06 13:10:28,519 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 361 selfloop transitions, 92 changer transitions 0/467 dead transitions. [2025-02-06 13:10:28,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 467 transitions, 5664 flow [2025-02-06 13:10:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:10:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:10:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 374 transitions. [2025-02-06 13:10:28,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6338983050847458 [2025-02-06 13:10:28,520 INFO L175 Difference]: Start difference. First operand has 138 places, 142 transitions, 1339 flow. Second operand 10 states and 374 transitions. [2025-02-06 13:10:28,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 467 transitions, 5664 flow [2025-02-06 13:10:29,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 467 transitions, 5651 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-02-06 13:10:29,253 INFO L231 Difference]: Finished difference. Result has 150 places, 197 transitions, 2272 flow [2025-02-06 13:10:29,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2272, PETRI_PLACES=150, PETRI_TRANSITIONS=197} [2025-02-06 13:10:29,253 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 92 predicate places. [2025-02-06 13:10:29,253 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 197 transitions, 2272 flow [2025-02-06 13:10:29,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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) [2025-02-06 13:10:29,253 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:29,253 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:29,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:29,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-06 13:10:29,458 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:10:29,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:29,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1304070797, now seen corresponding path program 1 times [2025-02-06 13:10:29,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:29,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070045769] [2025-02-06 13:10:29,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:29,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:29,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 13:10:29,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:10:29,465 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:29,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:10:29,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:29,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070045769] [2025-02-06 13:10:29,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070045769] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:29,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:29,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:10:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278103215] [2025-02-06 13:10:29,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:29,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:10:29,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:29,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:10:29,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:10:29,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:10:29,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 197 transitions, 2272 flow. Second operand has 6 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 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) [2025-02-06 13:10:29,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:29,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:10:29,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:34,428 INFO L124 PetriNetUnfolderBase]: 32917/52451 cut-off events. [2025-02-06 13:10:34,428 INFO L125 PetriNetUnfolderBase]: For 424560/424560 co-relation queries the response was YES. [2025-02-06 13:10:34,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254271 conditions, 52451 events. 32917/52451 cut-off events. For 424560/424560 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 420580 event pairs, 13013 based on Foata normal form. 84/51365 useless extension candidates. Maximal degree in co-relation 218190. Up to 31652 conditions per place. [2025-02-06 13:10:34,855 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 391 selfloop transitions, 29 changer transitions 3/437 dead transitions. [2025-02-06 13:10:34,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 437 transitions, 5985 flow [2025-02-06 13:10:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:10:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:10:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 246 transitions. [2025-02-06 13:10:34,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6949152542372882 [2025-02-06 13:10:34,856 INFO L175 Difference]: Start difference. First operand has 150 places, 197 transitions, 2272 flow. Second operand 6 states and 246 transitions. [2025-02-06 13:10:34,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 437 transitions, 5985 flow [2025-02-06 13:10:37,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 437 transitions, 5968 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-02-06 13:10:37,932 INFO L231 Difference]: Finished difference. Result has 154 places, 205 transitions, 2464 flow [2025-02-06 13:10:37,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2464, PETRI_PLACES=154, PETRI_TRANSITIONS=205} [2025-02-06 13:10:37,932 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 96 predicate places. [2025-02-06 13:10:37,932 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 205 transitions, 2464 flow [2025-02-06 13:10:37,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 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) [2025-02-06 13:10:37,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:37,932 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:37,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-02-06 13:10:37,933 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-06 13:10:37,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash 150179683, now seen corresponding path program 2 times [2025-02-06 13:10:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:37,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296903932] [2025-02-06 13:10:37,933 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:37,937 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 13:10:37,944 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:10:37,945 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:37,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:10:37,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:37,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296903932] [2025-02-06 13:10:37,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296903932] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:37,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059457385] [2025-02-06 13:10:37,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:37,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:37,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:37,979 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:37,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 13:10:38,024 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 13:10:38,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:10:38,041 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:38,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:38,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:10:38,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:38,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:38,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059457385] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:38,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:38,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2025-02-06 13:10:38,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11452720] [2025-02-06 13:10:38,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:38,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:10:38,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:38,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:10:38,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:10:38,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-06 13:10:38,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 205 transitions, 2464 flow. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 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) [2025-02-06 13:10:38,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:38,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-06 13:10:38,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand