./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.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-array-sum-alt.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 cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:07:46,186 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:07:46,253 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:07:46,260 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:07:46,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:07:46,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:07:46,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:07:46,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:07:46,292 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:07:46,292 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:07:46,293 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:07:46,293 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:07:46,294 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:07:46,294 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:07:46,294 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:07:46,294 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:07:46,295 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:07:46,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:07:46,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:07:46,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:07:46,295 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:07:46,295 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:07:46,295 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:07:46,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:07:46,296 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:07:46,296 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:07:46,296 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:07:46,296 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:07:46,296 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:07:46,296 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:07:46,296 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:07:46,296 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:07:46,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:07:46,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:07:46,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:07:46,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:07:46,298 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:07:46,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:07:46,298 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:07:46,298 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:07:46,298 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:07:46,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:07:46,298 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 -> cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 [2025-02-06 13:07:46,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:07:46,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:07:46,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:07:46,598 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:07:46,599 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:07:46,600 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2025-02-06 13:07:47,888 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1366fe604/a39bcc40b4cc4e3ea53eaa6dccfbd2c1/FLAG9d8e51c1e [2025-02-06 13:07:48,118 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:07:48,120 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2025-02-06 13:07:48,127 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1366fe604/a39bcc40b4cc4e3ea53eaa6dccfbd2c1/FLAG9d8e51c1e [2025-02-06 13:07:48,449 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1366fe604/a39bcc40b4cc4e3ea53eaa6dccfbd2c1 [2025-02-06 13:07:48,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:07:48,452 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:07:48,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:07:48,453 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:07:48,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:07:48,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79fb8f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48, skipping insertion in model container [2025-02-06 13:07:48,458 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,474 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:07:48,656 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 13:07:48,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:07:48,677 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:07:48,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:07:48,720 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:07:48,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48 WrapperNode [2025-02-06 13:07:48,721 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:07:48,722 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:07:48,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:07:48,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:07:48,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,736 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,765 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 174 [2025-02-06 13:07:48,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:07:48,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:07:48,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:07:48,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:07:48,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,782 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,808 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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 13:07:48,811 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,812 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,820 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:07:48,837 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:07:48,837 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:07:48,837 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:07:48,838 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (1/1) ... [2025-02-06 13:07:48,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:07:48,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:48,876 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 13:07:48,880 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 13:07:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:07:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:07:48,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:07:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:07:48,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:07:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:07:48,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:07:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:07:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:07:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:07:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:07:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:07:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:07:48,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:07:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:07:48,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:07:48,908 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 13:07:49,021 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:07:49,023 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:07:49,382 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:07:49,382 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:07:49,627 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:07:49,627 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:07:49,628 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:07:49 BoogieIcfgContainer [2025-02-06 13:07:49,628 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:07:49,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:07:49,632 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:07:49,636 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:07:49,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:07:48" (1/3) ... [2025-02-06 13:07:49,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db02749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:07:49, skipping insertion in model container [2025-02-06 13:07:49,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:07:48" (2/3) ... [2025-02-06 13:07:49,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db02749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:07:49, skipping insertion in model container [2025-02-06 13:07:49,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:07:49" (3/3) ... [2025-02-06 13:07:49,639 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2025-02-06 13:07:49,673 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:07:49,675 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt.wvr.c that has 4 procedures, 42 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2025-02-06 13:07:49,675 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:07:49,736 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:07:49,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 45 transitions, 111 flow [2025-02-06 13:07:49,814 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2025-02-06 13:07:49,816 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:07:49,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 42 events. 4/42 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 77 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2025-02-06 13:07:49,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 45 transitions, 111 flow [2025-02-06 13:07:49,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 41 transitions, 100 flow [2025-02-06 13:07:49,837 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:07:49,852 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;@7dd17bd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:07:49,853 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2025-02-06 13:07:49,857 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:07:49,859 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:07:49,859 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:07:49,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:49,860 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:07:49,861 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:49,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash 506466, now seen corresponding path program 1 times [2025-02-06 13:07:49,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:49,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266059545] [2025-02-06 13:07:49,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:49,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:49,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:07:49,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:07:49,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:49,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:50,088 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 13:07:50,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:50,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266059545] [2025-02-06 13:07:50,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266059545] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:07:50,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:07:50,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:07:50,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105036555] [2025-02-06 13:07:50,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:07:50,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:07:50,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:50,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:07:50,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:07:50,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:07:50,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 13:07:50,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:50,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:07:50,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:50,363 INFO L124 PetriNetUnfolderBase]: 498/814 cut-off events. [2025-02-06 13:07:50,363 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2025-02-06 13:07:50,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 814 events. 498/814 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3428 event pairs, 358 based on Foata normal form. 1/779 useless extension candidates. Maximal degree in co-relation 1383. Up to 717 conditions per place. [2025-02-06 13:07:50,375 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 25 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2025-02-06 13:07:50,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 148 flow [2025-02-06 13:07:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:07:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:07:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2025-02-06 13:07:50,388 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2025-02-06 13:07:50,390 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 100 flow. Second operand 3 states and 74 transitions. [2025-02-06 13:07:50,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 148 flow [2025-02-06 13:07:50,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:07:50,397 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2025-02-06 13:07:50,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2025-02-06 13:07:50,403 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2025-02-06 13:07:50,405 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2025-02-06 13:07:50,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 13:07:50,405 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:50,405 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:07:50,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:07:50,406 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:50,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:50,406 INFO L85 PathProgramCache]: Analyzing trace with hash 506467, now seen corresponding path program 1 times [2025-02-06 13:07:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:50,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622128982] [2025-02-06 13:07:50,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:50,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:50,419 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:07:50,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:07:50,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:50,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:50,768 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 13:07:50,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:50,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622128982] [2025-02-06 13:07:50,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622128982] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:07:50,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:07:50,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:07:50,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028794493] [2025-02-06 13:07:50,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:07:50,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:07:50,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:50,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:07:50,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:07:50,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:07:50,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 13:07:50,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:50,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:07:50,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:50,999 INFO L124 PetriNetUnfolderBase]: 499/817 cut-off events. [2025-02-06 13:07:50,999 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-06 13:07:51,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 817 events. 499/817 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3440 event pairs, 358 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1543. Up to 722 conditions per place. [2025-02-06 13:07:51,010 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2025-02-06 13:07:51,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 156 flow [2025-02-06 13:07:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:07:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:07:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2025-02-06 13:07:51,014 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2025-02-06 13:07:51,014 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 4 states and 92 transitions. [2025-02-06 13:07:51,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 156 flow [2025-02-06 13:07:51,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:07:51,017 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 109 flow [2025-02-06 13:07:51,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2025-02-06 13:07:51,018 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2025-02-06 13:07:51,019 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 109 flow [2025-02-06 13:07:51,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 13:07:51,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:51,019 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:07:51,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:07:51,020 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:51,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash 486731144, now seen corresponding path program 1 times [2025-02-06 13:07:51,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:51,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056760950] [2025-02-06 13:07:51,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:51,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:07:51,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:07:51,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:51,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:51,368 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 13:07:51,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056760950] [2025-02-06 13:07:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056760950] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:51,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161386948] [2025-02-06 13:07:51,370 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:51,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:51,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:51,373 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 13:07:51,375 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 13:07:51,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:07:51,441 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:07:51,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:51,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:51,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:07:51,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:51,499 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 13:07:51,724 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 13:07:51,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:51,825 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 13:07:51,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161386948] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:51,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:51,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:07:51,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714541038] [2025-02-06 13:07:51,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:51,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:07:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:51,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:07:51,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:07:51,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:07:51,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 109 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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 13:07:51,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:51,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:07:51,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:52,377 INFO L124 PetriNetUnfolderBase]: 500/819 cut-off events. [2025-02-06 13:07:52,377 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-06 13:07:52,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 819 events. 500/819 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3443 event pairs, 358 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 1550. Up to 719 conditions per place. [2025-02-06 13:07:52,383 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 23 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2025-02-06 13:07:52,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 183 flow [2025-02-06 13:07:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:07:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:07:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2025-02-06 13:07:52,385 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2025-02-06 13:07:52,385 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 109 flow. Second operand 8 states and 155 transitions. [2025-02-06 13:07:52,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 183 flow [2025-02-06 13:07:52,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:07:52,387 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 134 flow [2025-02-06 13:07:52,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=134, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2025-02-06 13:07:52,387 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2025-02-06 13:07:52,388 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 134 flow [2025-02-06 13:07:52,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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 13:07:52,388 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:52,388 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:07:52,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:07:52,593 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 13:07:52,593 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:52,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:52,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2088885590, now seen corresponding path program 1 times [2025-02-06 13:07:52,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:52,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862634758] [2025-02-06 13:07:52,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:52,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:52,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:07:52,605 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:07:52,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:52,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:52,679 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 13:07:52,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:52,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862634758] [2025-02-06 13:07:52,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862634758] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:07:52,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:07:52,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:07:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668964708] [2025-02-06 13:07:52,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:07:52,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:07:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:52,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:07:52,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:07:52,716 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2025-02-06 13:07:52,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 13:07:52,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:52,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2025-02-06 13:07:52,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:52,853 INFO L124 PetriNetUnfolderBase]: 500/788 cut-off events. [2025-02-06 13:07:52,854 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-06 13:07:52,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1558 conditions, 788 events. 500/788 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3076 event pairs, 358 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 1520. Up to 718 conditions per place. [2025-02-06 13:07:52,858 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 29 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2025-02-06 13:07:52,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 194 flow [2025-02-06 13:07:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:07:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:07:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2025-02-06 13:07:52,863 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-02-06 13:07:52,864 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 134 flow. Second operand 4 states and 78 transitions. [2025-02-06 13:07:52,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 194 flow [2025-02-06 13:07:52,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 152 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-06 13:07:52,865 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 94 flow [2025-02-06 13:07:52,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2025-02-06 13:07:52,866 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -6 predicate places. [2025-02-06 13:07:52,867 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 94 flow [2025-02-06 13:07:52,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 13:07:52,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:52,867 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:07:52,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:07:52,867 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:52,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2088885589, now seen corresponding path program 1 times [2025-02-06 13:07:52,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:52,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502074072] [2025-02-06 13:07:52,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:52,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:52,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:07:52,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:07:52,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:52,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:52,961 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 13:07:52,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:52,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502074072] [2025-02-06 13:07:52,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502074072] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:07:52,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:07:52,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:07:52,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451998293] [2025-02-06 13:07:52,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:07:52,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:07:52,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:52,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:07:52,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:07:52,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:07:52,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 13:07:52,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:52,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:07:52,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:53,269 INFO L124 PetriNetUnfolderBase]: 1081/1711 cut-off events. [2025-02-06 13:07:53,270 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2025-02-06 13:07:53,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3349 conditions, 1711 events. 1081/1711 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8245 event pairs, 716 based on Foata normal form. 0/1647 useless extension candidates. Maximal degree in co-relation 1956. Up to 932 conditions per place. [2025-02-06 13:07:53,283 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 66 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2025-02-06 13:07:53,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 77 transitions, 318 flow [2025-02-06 13:07:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:07:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:07:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2025-02-06 13:07:53,286 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2025-02-06 13:07:53,286 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 94 flow. Second operand 5 states and 144 transitions. [2025-02-06 13:07:53,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 77 transitions, 318 flow [2025-02-06 13:07:53,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 313 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:07:53,289 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 114 flow [2025-02-06 13:07:53,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2025-02-06 13:07:53,290 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2025-02-06 13:07:53,290 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 114 flow [2025-02-06 13:07:53,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 13:07:53,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:53,291 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:53,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:07:53,291 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:53,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash 400744806, now seen corresponding path program 1 times [2025-02-06 13:07:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:53,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875307357] [2025-02-06 13:07:53,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:53,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:53,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:07:53,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:07:53,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:53,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:53,484 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 13:07:53,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875307357] [2025-02-06 13:07:53,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875307357] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181927944] [2025-02-06 13:07:53,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:53,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:53,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:53,487 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 13:07:53,489 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 13:07:53,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:07:53,551 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:07:53,552 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:53,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:53,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:07:53,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:53,632 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 13:07:53,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:53,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-06 13:07:53,700 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 13:07:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181927944] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:53,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:53,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-06 13:07:53,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007794468] [2025-02-06 13:07:53,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:53,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:07:53,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:53,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:07:53,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:07:53,827 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:07:53,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 114 flow. Second operand has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 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 13:07:53,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:53,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:07:53,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:54,251 INFO L124 PetriNetUnfolderBase]: 1290/2037 cut-off events. [2025-02-06 13:07:54,251 INFO L125 PetriNetUnfolderBase]: For 552/638 co-relation queries the response was YES. [2025-02-06 13:07:54,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4427 conditions, 2037 events. 1290/2037 cut-off events. For 552/638 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10181 event pairs, 732 based on Foata normal form. 0/1969 useless extension candidates. Maximal degree in co-relation 2776. Up to 988 conditions per place. [2025-02-06 13:07:54,260 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 65 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2025-02-06 13:07:54,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 79 transitions, 344 flow [2025-02-06 13:07:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:07:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:07:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2025-02-06 13:07:54,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5962962962962963 [2025-02-06 13:07:54,262 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 114 flow. Second operand 6 states and 161 transitions. [2025-02-06 13:07:54,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 79 transitions, 344 flow [2025-02-06 13:07:54,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 79 transitions, 339 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:07:54,264 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 140 flow [2025-02-06 13:07:54,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=140, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2025-02-06 13:07:54,264 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2025-02-06 13:07:54,264 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 140 flow [2025-02-06 13:07:54,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 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 13:07:54,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:54,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:54,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:07:54,465 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 13:07:54,465 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:54,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:54,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1670437546, now seen corresponding path program 1 times [2025-02-06 13:07:54,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:54,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794043710] [2025-02-06 13:07:54,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:54,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:54,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:07:54,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:07:54,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:54,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:54,527 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 13:07:54,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:54,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794043710] [2025-02-06 13:07:54,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794043710] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:07:54,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:07:54,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:07:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388478270] [2025-02-06 13:07:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:07:54,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:07:54,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:54,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:07:54,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:07:54,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:07:54,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 13:07:54,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:54,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:07:54,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:54,762 INFO L124 PetriNetUnfolderBase]: 1070/1655 cut-off events. [2025-02-06 13:07:54,763 INFO L125 PetriNetUnfolderBase]: For 1635/1984 co-relation queries the response was YES. [2025-02-06 13:07:54,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4157 conditions, 1655 events. 1070/1655 cut-off events. For 1635/1984 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7523 event pairs, 697 based on Foata normal form. 0/1600 useless extension candidates. Maximal degree in co-relation 3212. Up to 1185 conditions per place. [2025-02-06 13:07:54,771 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 61 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2025-02-06 13:07:54,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 344 flow [2025-02-06 13:07:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:07:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:07:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2025-02-06 13:07:54,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6088888888888889 [2025-02-06 13:07:54,773 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 140 flow. Second operand 5 states and 137 transitions. [2025-02-06 13:07:54,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 344 flow [2025-02-06 13:07:54,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 72 transitions, 329 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 13:07:54,776 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 152 flow [2025-02-06 13:07:54,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2025-02-06 13:07:54,777 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2025-02-06 13:07:54,777 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 152 flow [2025-02-06 13:07:54,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 13:07:54,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:54,777 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:54,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:07:54,777 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:54,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1432411823, now seen corresponding path program 1 times [2025-02-06 13:07:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:54,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734876587] [2025-02-06 13:07:54,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:54,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:54,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:07:54,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:07:54,795 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:54,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:54,961 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 13:07:54,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:54,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734876587] [2025-02-06 13:07:54,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734876587] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:54,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718569516] [2025-02-06 13:07:54,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:54,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:54,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:54,964 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 13:07:54,966 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 13:07:55,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:07:55,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:07:55,026 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:55,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:55,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:07:55,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:55,118 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 13:07:55,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:55,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-06 13:07:55,181 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 13:07:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718569516] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:55,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-06 13:07:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091074565] [2025-02-06 13:07:55,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:55,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:07:55,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:55,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:07:55,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:07:55,296 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:07:55,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 152 flow. Second operand has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 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 13:07:55,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:55,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:07:55,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:55,785 INFO L124 PetriNetUnfolderBase]: 1537/2332 cut-off events. [2025-02-06 13:07:55,785 INFO L125 PetriNetUnfolderBase]: For 2261/2841 co-relation queries the response was YES. [2025-02-06 13:07:55,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 2332 events. 1537/2332 cut-off events. For 2261/2841 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10609 event pairs, 570 based on Foata normal form. 0/2271 useless extension candidates. Maximal degree in co-relation 4991. Up to 850 conditions per place. [2025-02-06 13:07:55,801 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 77 selfloop transitions, 10 changer transitions 0/93 dead transitions. [2025-02-06 13:07:55,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 93 transitions, 466 flow [2025-02-06 13:07:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:07:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:07:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2025-02-06 13:07:55,803 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5841269841269842 [2025-02-06 13:07:55,803 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 152 flow. Second operand 7 states and 184 transitions. [2025-02-06 13:07:55,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 93 transitions, 466 flow [2025-02-06 13:07:55,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:07:55,806 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 191 flow [2025-02-06 13:07:55,806 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2025-02-06 13:07:55,809 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2025-02-06 13:07:55,809 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 191 flow [2025-02-06 13:07:55,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 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 13:07:55,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:55,810 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:55,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:07:56,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:56,014 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:56,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1010237242, now seen corresponding path program 1 times [2025-02-06 13:07:56,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:56,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213249579] [2025-02-06 13:07:56,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:56,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:56,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:07:56,023 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:07:56,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:56,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:56,087 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 13:07:56,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:56,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213249579] [2025-02-06 13:07:56,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213249579] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:07:56,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:07:56,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:07:56,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578354353] [2025-02-06 13:07:56,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:07:56,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:07:56,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:56,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:07:56,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:07:56,105 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:07:56,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 13:07:56,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:56,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:07:56,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:56,341 INFO L124 PetriNetUnfolderBase]: 1501/2245 cut-off events. [2025-02-06 13:07:56,341 INFO L125 PetriNetUnfolderBase]: For 3501/4146 co-relation queries the response was YES. [2025-02-06 13:07:56,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6599 conditions, 2245 events. 1501/2245 cut-off events. For 3501/4146 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9824 event pairs, 1035 based on Foata normal form. 0/2166 useless extension candidates. Maximal degree in co-relation 5926. Up to 1895 conditions per place. [2025-02-06 13:07:56,357 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 57 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2025-02-06 13:07:56,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 375 flow [2025-02-06 13:07:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:07:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:07:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2025-02-06 13:07:56,358 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2025-02-06 13:07:56,358 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 191 flow. Second operand 5 states and 130 transitions. [2025-02-06 13:07:56,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 375 flow [2025-02-06 13:07:56,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 360 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 13:07:56,363 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 203 flow [2025-02-06 13:07:56,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2025-02-06 13:07:56,364 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2025-02-06 13:07:56,364 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 203 flow [2025-02-06 13:07:56,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 13:07:56,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:56,364 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:56,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:07:56,364 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:56,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:56,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1431280918, now seen corresponding path program 1 times [2025-02-06 13:07:56,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:56,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464590670] [2025-02-06 13:07:56,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:56,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:56,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:07:56,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:07:56,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:56,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:07:56,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:56,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464590670] [2025-02-06 13:07:56,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464590670] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:56,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420858601] [2025-02-06 13:07:56,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:56,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:56,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:56,474 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 13:07:56,476 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 13:07:56,524 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:07:56,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:07:56,538 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:56,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:56,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:07:56,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:07:56,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:07:56,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420858601] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:56,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:56,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:07:56,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794844204] [2025-02-06 13:07:56,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:56,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:07:56,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:56,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:07:56,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:07:56,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:07:56,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 203 flow. Second operand has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 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 13:07:56,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:56,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:07:56,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:57,269 INFO L124 PetriNetUnfolderBase]: 3111/4745 cut-off events. [2025-02-06 13:07:57,269 INFO L125 PetriNetUnfolderBase]: For 5129/5491 co-relation queries the response was YES. [2025-02-06 13:07:57,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14000 conditions, 4745 events. 3111/4745 cut-off events. For 5129/5491 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 24820 event pairs, 1689 based on Foata normal form. 98/4841 useless extension candidates. Maximal degree in co-relation 13283. Up to 2304 conditions per place. [2025-02-06 13:07:57,305 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 100 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2025-02-06 13:07:57,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 119 transitions, 696 flow [2025-02-06 13:07:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:07:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:07:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2025-02-06 13:07:57,306 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-02-06 13:07:57,307 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 203 flow. Second operand 8 states and 210 transitions. [2025-02-06 13:07:57,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 119 transitions, 696 flow [2025-02-06 13:07:57,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 119 transitions, 691 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:07:57,316 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 271 flow [2025-02-06 13:07:57,316 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2025-02-06 13:07:57,317 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2025-02-06 13:07:57,317 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 271 flow [2025-02-06 13:07:57,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 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 13:07:57,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:57,317 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:57,324 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 13:07:57,521 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 13:07:57,521 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:57,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2119690357, now seen corresponding path program 1 times [2025-02-06 13:07:57,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:57,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472041724] [2025-02-06 13:07:57,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:57,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:57,527 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:07:57,532 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:07:57,533 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:57,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:07:57,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:57,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472041724] [2025-02-06 13:07:57,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472041724] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:07:57,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:07:57,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:07:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11108352] [2025-02-06 13:07:57,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:07:57,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:07:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:57,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:07:57,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:07:57,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2025-02-06 13:07:57,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 271 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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 13:07:57,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:57,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2025-02-06 13:07:57,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:58,311 INFO L124 PetriNetUnfolderBase]: 2761/4044 cut-off events. [2025-02-06 13:07:58,311 INFO L125 PetriNetUnfolderBase]: For 11735/13012 co-relation queries the response was YES. [2025-02-06 13:07:58,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13934 conditions, 4044 events. 2761/4044 cut-off events. For 11735/13012 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19584 event pairs, 769 based on Foata normal form. 0/3889 useless extension candidates. Maximal degree in co-relation 9290. Up to 1602 conditions per place. [2025-02-06 13:07:58,337 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 83 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2025-02-06 13:07:58,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 731 flow [2025-02-06 13:07:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:07:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:07:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2025-02-06 13:07:58,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-06 13:07:58,339 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 271 flow. Second operand 6 states and 135 transitions. [2025-02-06 13:07:58,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 731 flow [2025-02-06 13:07:58,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 98 transitions, 707 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-02-06 13:07:58,349 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 273 flow [2025-02-06 13:07:58,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2025-02-06 13:07:58,350 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2025-02-06 13:07:58,350 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 273 flow [2025-02-06 13:07:58,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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 13:07:58,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:58,351 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:58,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:07:58,351 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:07:58,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash -321827803, now seen corresponding path program 2 times [2025-02-06 13:07:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361174712] [2025-02-06 13:07:58,352 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:07:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:58,361 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-06 13:07:58,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:07:58,377 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:07:58,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:07:58,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:58,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361174712] [2025-02-06 13:07:58,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361174712] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:58,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61697562] [2025-02-06 13:07:58,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:07:58,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:58,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:58,601 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 13:07:58,604 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 13:07:58,652 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-06 13:07:58,669 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:07:58,669 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:07:58,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:58,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 13:07:58,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:58,677 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 13:07:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:07:58,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:07:58,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61697562] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:58,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:59,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-06 13:07:59,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997622014] [2025-02-06 13:07:59,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:59,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:07:59,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:59,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:07:59,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:07:59,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2025-02-06 13:07:59,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 273 flow. Second operand has 20 states, 20 states have (on average 14.75) internal successors, (295), 20 states have internal predecessors, (295), 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 13:07:59,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:59,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2025-02-06 13:07:59,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:00,676 INFO L124 PetriNetUnfolderBase]: 4011/5725 cut-off events. [2025-02-06 13:08:00,676 INFO L125 PetriNetUnfolderBase]: For 9661/10245 co-relation queries the response was YES. [2025-02-06 13:08:00,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19977 conditions, 5725 events. 4011/5725 cut-off events. For 9661/10245 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28133 event pairs, 851 based on Foata normal form. 0/5721 useless extension candidates. Maximal degree in co-relation 10634. Up to 1061 conditions per place. [2025-02-06 13:08:00,718 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 184 selfloop transitions, 25 changer transitions 0/213 dead transitions. [2025-02-06 13:08:00,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 213 transitions, 1366 flow [2025-02-06 13:08:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:08:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:08:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 356 transitions. [2025-02-06 13:08:00,720 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5650793650793651 [2025-02-06 13:08:00,720 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 273 flow. Second operand 14 states and 356 transitions. [2025-02-06 13:08:00,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 213 transitions, 1366 flow [2025-02-06 13:08:00,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 213 transitions, 1294 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:08:00,734 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 367 flow [2025-02-06 13:08:00,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=367, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2025-02-06 13:08:00,735 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 29 predicate places. [2025-02-06 13:08:00,735 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 367 flow [2025-02-06 13:08:00,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.75) internal successors, (295), 20 states have internal predecessors, (295), 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 13:08:00,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:00,735 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:00,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:08:00,940 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,SelfDestructingSolverStorable11 [2025-02-06 13:08:00,940 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:00,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash 429720758, now seen corresponding path program 1 times [2025-02-06 13:08:00,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:00,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762936786] [2025-02-06 13:08:00,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:00,946 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:08:00,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:08:00,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:00,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:01,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762936786] [2025-02-06 13:08:01,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762936786] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:01,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837365149] [2025-02-06 13:08:01,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:01,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:01,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:01,074 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 13:08:01,076 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 13:08:01,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:08:01,141 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:08:01,141 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:01,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:01,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:08:01,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:01,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:01,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837365149] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:01,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:01,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-02-06 13:08:01,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976118108] [2025-02-06 13:08:01,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:01,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:08:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:01,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:08:01,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:08:01,339 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2025-02-06 13:08:01,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 367 flow. Second operand has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 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 13:08:01,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:01,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2025-02-06 13:08:01,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:01,849 INFO L124 PetriNetUnfolderBase]: 3520/5131 cut-off events. [2025-02-06 13:08:01,849 INFO L125 PetriNetUnfolderBase]: For 18429/19286 co-relation queries the response was YES. [2025-02-06 13:08:01,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19447 conditions, 5131 events. 3520/5131 cut-off events. For 18429/19286 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 24933 event pairs, 1781 based on Foata normal form. 119/5176 useless extension candidates. Maximal degree in co-relation 12599. Up to 2914 conditions per place. [2025-02-06 13:08:01,870 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 97 selfloop transitions, 13 changer transitions 0/116 dead transitions. [2025-02-06 13:08:01,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 873 flow [2025-02-06 13:08:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:08:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:08:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2025-02-06 13:08:01,872 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2025-02-06 13:08:01,872 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 367 flow. Second operand 8 states and 204 transitions. [2025-02-06 13:08:01,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 873 flow [2025-02-06 13:08:01,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 116 transitions, 751 flow, removed 12 selfloop flow, removed 10 redundant places. [2025-02-06 13:08:01,886 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 365 flow [2025-02-06 13:08:01,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=365, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2025-02-06 13:08:01,886 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 29 predicate places. [2025-02-06 13:08:01,886 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 365 flow [2025-02-06 13:08:01,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 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 13:08:01,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:01,887 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:01,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:08:02,087 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,SelfDestructingSolverStorable12 [2025-02-06 13:08:02,088 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:02,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash 576772209, now seen corresponding path program 2 times [2025-02-06 13:08:02,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:02,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391265775] [2025-02-06 13:08:02,088 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:08:02,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:02,095 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:08:02,103 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:08:02,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:08:02,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:08:02,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:02,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391265775] [2025-02-06 13:08:02,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391265775] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:02,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809209713] [2025-02-06 13:08:02,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:08:02,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:02,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:02,281 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 13:08:02,282 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 13:08:02,333 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:08:02,350 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:08:02,351 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:08:02,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:02,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:08:02,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:02,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:02,624 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 24 treesize of output 20 [2025-02-06 13:08:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:02,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809209713] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:02,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:02,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-06 13:08:02,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72274614] [2025-02-06 13:08:02,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:02,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:08:02,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:02,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:08:02,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:08:03,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2025-02-06 13:08:03,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 365 flow. Second operand has 20 states, 20 states have (on average 16.35) internal successors, (327), 20 states have internal predecessors, (327), 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 13:08:03,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:03,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2025-02-06 13:08:03,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:04,349 INFO L124 PetriNetUnfolderBase]: 4466/6316 cut-off events. [2025-02-06 13:08:04,349 INFO L125 PetriNetUnfolderBase]: For 13765/14565 co-relation queries the response was YES. [2025-02-06 13:08:04,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22163 conditions, 6316 events. 4466/6316 cut-off events. For 13765/14565 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 29380 event pairs, 629 based on Foata normal form. 232/6448 useless extension candidates. Maximal degree in co-relation 14570. Up to 1172 conditions per place. [2025-02-06 13:08:04,392 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 175 selfloop transitions, 21 changer transitions 0/201 dead transitions. [2025-02-06 13:08:04,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 201 transitions, 1350 flow [2025-02-06 13:08:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:08:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:08:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 351 transitions. [2025-02-06 13:08:04,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-02-06 13:08:04,394 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 365 flow. Second operand 14 states and 351 transitions. [2025-02-06 13:08:04,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 201 transitions, 1350 flow [2025-02-06 13:08:04,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 201 transitions, 1334 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 13:08:04,414 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 425 flow [2025-02-06 13:08:04,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=425, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2025-02-06 13:08:04,415 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 39 predicate places. [2025-02-06 13:08:04,415 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 425 flow [2025-02-06 13:08:04,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.35) internal successors, (327), 20 states have internal predecessors, (327), 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 13:08:04,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:04,415 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:04,423 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 13:08:04,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:04,616 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:04,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash 225723634, now seen corresponding path program 1 times [2025-02-06 13:08:04,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:04,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991347305] [2025-02-06 13:08:04,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:04,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:04,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:08:04,626 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:08:04,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:04,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:04,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:04,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991347305] [2025-02-06 13:08:04,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991347305] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:04,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:04,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:04,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293246772] [2025-02-06 13:08:04,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:04,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:04,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:04,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:04,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2025-02-06 13:08:04,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 425 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 13:08:04,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:04,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2025-02-06 13:08:04,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:05,080 INFO L124 PetriNetUnfolderBase]: 4270/6343 cut-off events. [2025-02-06 13:08:05,080 INFO L125 PetriNetUnfolderBase]: For 21120/22020 co-relation queries the response was YES. [2025-02-06 13:08:05,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23716 conditions, 6343 events. 4270/6343 cut-off events. For 21120/22020 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32939 event pairs, 913 based on Foata normal form. 47/6272 useless extension candidates. Maximal degree in co-relation 15182. Up to 4832 conditions per place. [2025-02-06 13:08:05,120 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 73 selfloop transitions, 5 changer transitions 8/94 dead transitions. [2025-02-06 13:08:05,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 753 flow [2025-02-06 13:08:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-02-06 13:08:05,122 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2025-02-06 13:08:05,122 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 425 flow. Second operand 3 states and 95 transitions. [2025-02-06 13:08:05,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 753 flow [2025-02-06 13:08:05,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 676 flow, removed 12 selfloop flow, removed 10 redundant places. [2025-02-06 13:08:05,145 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 353 flow [2025-02-06 13:08:05,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=353, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2025-02-06 13:08:05,146 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2025-02-06 13:08:05,146 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 353 flow [2025-02-06 13:08:05,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 13:08:05,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:05,147 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, 1, 1] [2025-02-06 13:08:05,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:08:05,147 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:05,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash 924591147, now seen corresponding path program 1 times [2025-02-06 13:08:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:05,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250005425] [2025-02-06 13:08:05,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:05,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:08:05,158 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:05,158 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:05,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:05,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250005425] [2025-02-06 13:08:05,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250005425] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:05,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246945787] [2025-02-06 13:08:05,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:05,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:05,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:05,241 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 13:08:05,243 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 13:08:05,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:08:05,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:05,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:05,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:05,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:08:05,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:05,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:05,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246945787] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:05,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:08:05,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2025-02-06 13:08:05,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715698116] [2025-02-06 13:08:05,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:05,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:08:05,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:05,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:08:05,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:08:05,475 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2025-02-06 13:08:05,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 64 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:05,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:05,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2025-02-06 13:08:05,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:06,136 INFO L124 PetriNetUnfolderBase]: 6270/8870 cut-off events. [2025-02-06 13:08:06,137 INFO L125 PetriNetUnfolderBase]: For 22498/23470 co-relation queries the response was YES. [2025-02-06 13:08:06,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32517 conditions, 8870 events. 6270/8870 cut-off events. For 22498/23470 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 44250 event pairs, 1136 based on Foata normal form. 89/8334 useless extension candidates. Maximal degree in co-relation 21374. Up to 2457 conditions per place. [2025-02-06 13:08:06,179 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 168 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2025-02-06 13:08:06,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 193 transitions, 1522 flow [2025-02-06 13:08:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:08:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:08:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2025-02-06 13:08:06,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5432098765432098 [2025-02-06 13:08:06,180 INFO L175 Difference]: Start difference. First operand has 79 places, 64 transitions, 353 flow. Second operand 9 states and 220 transitions. [2025-02-06 13:08:06,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 193 transitions, 1522 flow [2025-02-06 13:08:06,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 193 transitions, 1286 flow, removed 48 selfloop flow, removed 8 redundant places. [2025-02-06 13:08:06,241 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 403 flow [2025-02-06 13:08:06,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, 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=75, PETRI_TRANSITIONS=76} [2025-02-06 13:08:06,242 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 28 predicate places. [2025-02-06 13:08:06,242 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 403 flow [2025-02-06 13:08:06,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:06,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:06,242 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, 1, 1] [2025-02-06 13:08:06,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 13:08:06,443 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 13:08:06,443 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:06,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash 970114765, now seen corresponding path program 2 times [2025-02-06 13:08:06,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:06,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417450761] [2025-02-06 13:08:06,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:08:06,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:06,450 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:08:06,455 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:06,455 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:08:06,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:08:06,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417450761] [2025-02-06 13:08:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417450761] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520645858] [2025-02-06 13:08:06,515 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:08:06,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:06,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:06,518 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 13:08:06,520 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 13:08:06,572 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:08:06,595 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:06,595 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:08:06,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:06,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:08:06,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:06,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:06,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520645858] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:06,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:08:06,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2025-02-06 13:08:06,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926282392] [2025-02-06 13:08:06,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:06,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:08:06,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:06,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:08:06,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:08:06,739 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2025-02-06 13:08:06,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 403 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:06,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:06,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2025-02-06 13:08:06,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:07,556 INFO L124 PetriNetUnfolderBase]: 7487/10605 cut-off events. [2025-02-06 13:08:07,556 INFO L125 PetriNetUnfolderBase]: For 18366/18887 co-relation queries the response was YES. [2025-02-06 13:08:07,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35863 conditions, 10605 events. 7487/10605 cut-off events. For 18366/18887 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 53541 event pairs, 932 based on Foata normal form. 133/10450 useless extension candidates. Maximal degree in co-relation 26035. Up to 2793 conditions per place. [2025-02-06 13:08:07,621 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 173 selfloop transitions, 42 changer transitions 0/219 dead transitions. [2025-02-06 13:08:07,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 219 transitions, 1592 flow [2025-02-06 13:08:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:08:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:08:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2025-02-06 13:08:07,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5209876543209877 [2025-02-06 13:08:07,623 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 403 flow. Second operand 9 states and 211 transitions. [2025-02-06 13:08:07,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 219 transitions, 1592 flow [2025-02-06 13:08:07,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 219 transitions, 1589 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:07,659 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 765 flow [2025-02-06 13:08:07,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=765, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2025-02-06 13:08:07,659 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 40 predicate places. [2025-02-06 13:08:07,659 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 765 flow [2025-02-06 13:08:07,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:07,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:07,660 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, 1, 1] [2025-02-06 13:08:07,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 13:08:07,860 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 13:08:07,860 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:07,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:07,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1602546233, now seen corresponding path program 3 times [2025-02-06 13:08:07,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:07,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365249345] [2025-02-06 13:08:07,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:08:07,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:07,866 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-02-06 13:08:07,870 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 23 statements. [2025-02-06 13:08:07,870 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:08:07,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:08:07,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:07,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365249345] [2025-02-06 13:08:07,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365249345] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574601466] [2025-02-06 13:08:07,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:08:07,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:07,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:07,928 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 13:08:07,930 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 13:08:07,985 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-02-06 13:08:08,006 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 23 statements. [2025-02-06 13:08:08,006 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:08:08,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:08,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:08:08,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:08:08,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:08:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574601466] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:08,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:08,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-02-06 13:08:08,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553446671] [2025-02-06 13:08:08,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:08,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:08:08,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:08,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:08:08,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:08:08,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2025-02-06 13:08:08,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 765 flow. Second operand has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 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 13:08:08,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:08,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2025-02-06 13:08:08,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:10,312 INFO L124 PetriNetUnfolderBase]: 18842/26514 cut-off events. [2025-02-06 13:08:10,313 INFO L125 PetriNetUnfolderBase]: For 87903/87903 co-relation queries the response was YES. [2025-02-06 13:08:10,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106754 conditions, 26514 events. 18842/26514 cut-off events. For 87903/87903 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 148077 event pairs, 964 based on Foata normal form. 22/25736 useless extension candidates. Maximal degree in co-relation 90990. Up to 4445 conditions per place. [2025-02-06 13:08:10,474 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 488 selfloop transitions, 389 changer transitions 0/878 dead transitions. [2025-02-06 13:08:10,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 878 transitions, 8439 flow [2025-02-06 13:08:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-06 13:08:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-02-06 13:08:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 761 transitions. [2025-02-06 13:08:10,477 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5455197132616487 [2025-02-06 13:08:10,477 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 765 flow. Second operand 31 states and 761 transitions. [2025-02-06 13:08:10,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 878 transitions, 8439 flow [2025-02-06 13:08:11,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 878 transitions, 8364 flow, removed 36 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:11,101 INFO L231 Difference]: Finished difference. Result has 141 places, 506 transitions, 6257 flow [2025-02-06 13:08:11,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6257, PETRI_PLACES=141, PETRI_TRANSITIONS=506} [2025-02-06 13:08:11,102 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 94 predicate places. [2025-02-06 13:08:11,102 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 506 transitions, 6257 flow [2025-02-06 13:08:11,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 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 13:08:11,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:11,102 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, 1, 1] [2025-02-06 13:08:11,108 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 13:08:11,303 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 13:08:11,303 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:11,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:11,304 INFO L85 PathProgramCache]: Analyzing trace with hash 595186899, now seen corresponding path program 4 times [2025-02-06 13:08:11,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:11,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553852953] [2025-02-06 13:08:11,304 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:08:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:11,310 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:08:11,312 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-02-06 13:08:11,312 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:08:11,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:08:11,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:11,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553852953] [2025-02-06 13:08:11,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553852953] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:11,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:11,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:08:11,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940638007] [2025-02-06 13:08:11,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:11,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:08:11,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:11,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:08:11,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:08:11,391 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2025-02-06 13:08:11,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 506 transitions, 6257 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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 13:08:11,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:11,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2025-02-06 13:08:11,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:15,051 INFO L124 PetriNetUnfolderBase]: 21614/30382 cut-off events. [2025-02-06 13:08:15,051 INFO L125 PetriNetUnfolderBase]: For 208290/208290 co-relation queries the response was YES. [2025-02-06 13:08:15,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151176 conditions, 30382 events. 21614/30382 cut-off events. For 208290/208290 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 173386 event pairs, 6397 based on Foata normal form. 4/30386 useless extension candidates. Maximal degree in co-relation 145965. Up to 13952 conditions per place. [2025-02-06 13:08:15,373 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 551 selfloop transitions, 222 changer transitions 7/781 dead transitions. [2025-02-06 13:08:15,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 781 transitions, 10556 flow [2025-02-06 13:08:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:08:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:08:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2025-02-06 13:08:15,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-02-06 13:08:15,375 INFO L175 Difference]: Start difference. First operand has 141 places, 506 transitions, 6257 flow. Second operand 7 states and 180 transitions. [2025-02-06 13:08:15,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 781 transitions, 10556 flow [2025-02-06 13:08:17,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 781 transitions, 10380 flow, removed 88 selfloop flow, removed 0 redundant places. [2025-02-06 13:08:17,324 INFO L231 Difference]: Finished difference. Result has 152 places, 568 transitions, 7762 flow [2025-02-06 13:08:17,324 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6135, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7762, PETRI_PLACES=152, PETRI_TRANSITIONS=568} [2025-02-06 13:08:17,324 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 105 predicate places. [2025-02-06 13:08:17,324 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 568 transitions, 7762 flow [2025-02-06 13:08:17,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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 13:08:17,325 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:17,325 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, 1, 1] [2025-02-06 13:08:17,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-06 13:08:17,325 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:17,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash 164090911, now seen corresponding path program 5 times [2025-02-06 13:08:17,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:17,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666959611] [2025-02-06 13:08:17,326 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:08:17,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:17,333 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-02-06 13:08:17,339 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:17,340 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:08:17,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:17,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666959611] [2025-02-06 13:08:17,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666959611] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768066463] [2025-02-06 13:08:17,403 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:08:17,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:17,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:17,406 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 13:08:17,407 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 13:08:17,463 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-02-06 13:08:17,486 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:17,486 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:08:17,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:17,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:08:17,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:17,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:17,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768066463] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:17,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:08:17,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-02-06 13:08:17,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100573097] [2025-02-06 13:08:17,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:17,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:08:17,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:17,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:08:17,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:08:17,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2025-02-06 13:08:17,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 568 transitions, 7762 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:17,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:17,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2025-02-06 13:08:17,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:21,225 INFO L124 PetriNetUnfolderBase]: 19244/27417 cut-off events. [2025-02-06 13:08:21,225 INFO L125 PetriNetUnfolderBase]: For 208658/209877 co-relation queries the response was YES. [2025-02-06 13:08:21,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138560 conditions, 27417 events. 19244/27417 cut-off events. For 208658/209877 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 162153 event pairs, 2800 based on Foata normal form. 219/27372 useless extension candidates. Maximal degree in co-relation 133077. Up to 12724 conditions per place. [2025-02-06 13:08:21,747 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 433 selfloop transitions, 305 changer transitions 0/749 dead transitions. [2025-02-06 13:08:21,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 749 transitions, 11082 flow [2025-02-06 13:08:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:08:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:08:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2025-02-06 13:08:21,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2025-02-06 13:08:21,748 INFO L175 Difference]: Start difference. First operand has 152 places, 568 transitions, 7762 flow. Second operand 8 states and 199 transitions. [2025-02-06 13:08:21,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 749 transitions, 11082 flow [2025-02-06 13:08:23,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 749 transitions, 10814 flow, removed 34 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:23,228 INFO L231 Difference]: Finished difference. Result has 159 places, 620 transitions, 9428 flow [2025-02-06 13:08:23,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7540, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9428, PETRI_PLACES=159, PETRI_TRANSITIONS=620} [2025-02-06 13:08:23,229 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 112 predicate places. [2025-02-06 13:08:23,229 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 620 transitions, 9428 flow [2025-02-06 13:08:23,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:23,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:23,229 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, 1, 1] [2025-02-06 13:08:23,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:23,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:23,430 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:23,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2142519897, now seen corresponding path program 6 times [2025-02-06 13:08:23,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:23,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863616580] [2025-02-06 13:08:23,431 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:08:23,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:23,437 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-02-06 13:08:23,441 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:23,441 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:08:23,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:08:23,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:23,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863616580] [2025-02-06 13:08:23,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863616580] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:23,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211595392] [2025-02-06 13:08:23,497 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:08:23,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:23,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:23,499 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 13:08:23,502 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 13:08:23,555 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-02-06 13:08:23,576 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:23,577 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:08:23,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:23,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:08:23,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:23,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:23,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211595392] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:23,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:08:23,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-02-06 13:08:23,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135705524] [2025-02-06 13:08:23,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:23,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:08:23,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:23,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:08:23,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:08:23,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2025-02-06 13:08:23,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 620 transitions, 9428 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:23,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:23,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2025-02-06 13:08:23,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:28,014 INFO L124 PetriNetUnfolderBase]: 20512/29268 cut-off events. [2025-02-06 13:08:28,014 INFO L125 PetriNetUnfolderBase]: For 249864/250936 co-relation queries the response was YES. [2025-02-06 13:08:28,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152530 conditions, 29268 events. 20512/29268 cut-off events. For 249864/250936 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 175617 event pairs, 3151 based on Foata normal form. 261/29249 useless extension candidates. Maximal degree in co-relation 148589. Up to 12051 conditions per place. [2025-02-06 13:08:28,453 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 404 selfloop transitions, 439 changer transitions 1/855 dead transitions. [2025-02-06 13:08:28,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 855 transitions, 13313 flow [2025-02-06 13:08:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:08:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:08:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2025-02-06 13:08:28,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2025-02-06 13:08:28,455 INFO L175 Difference]: Start difference. First operand has 159 places, 620 transitions, 9428 flow. Second operand 9 states and 231 transitions. [2025-02-06 13:08:28,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 855 transitions, 13313 flow [2025-02-06 13:08:30,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 855 transitions, 12882 flow, removed 70 selfloop flow, removed 4 redundant places. [2025-02-06 13:08:30,883 INFO L231 Difference]: Finished difference. Result has 166 places, 676 transitions, 11268 flow [2025-02-06 13:08:30,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8999, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11268, PETRI_PLACES=166, PETRI_TRANSITIONS=676} [2025-02-06 13:08:30,884 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 119 predicate places. [2025-02-06 13:08:30,884 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 676 transitions, 11268 flow [2025-02-06 13:08:30,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:30,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:30,884 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, 1, 1] [2025-02-06 13:08:30,892 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 13:08:31,085 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 13:08:31,085 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:31,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:31,085 INFO L85 PathProgramCache]: Analyzing trace with hash 84725671, now seen corresponding path program 7 times [2025-02-06 13:08:31,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:31,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85548405] [2025-02-06 13:08:31,086 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:08:31,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:31,090 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:08:31,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:31,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:31,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:31,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85548405] [2025-02-06 13:08:31,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85548405] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913524284] [2025-02-06 13:08:31,191 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:08:31,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:31,195 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 13:08:31,197 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 13:08:31,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:08:31,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:31,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:31,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:31,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:08:31,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:31,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:31,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913524284] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:31,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:08:31,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 15 [2025-02-06 13:08:31,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119257296] [2025-02-06 13:08:31,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:31,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:08:31,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:31,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:08:31,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:08:31,456 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2025-02-06 13:08:31,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 676 transitions, 11268 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:31,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:31,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2025-02-06 13:08:31,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:35,670 INFO L124 PetriNetUnfolderBase]: 20496/29193 cut-off events. [2025-02-06 13:08:35,670 INFO L125 PetriNetUnfolderBase]: For 286881/287909 co-relation queries the response was YES. [2025-02-06 13:08:36,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153907 conditions, 29193 events. 20496/29193 cut-off events. For 286881/287909 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 174123 event pairs, 2954 based on Foata normal form. 235/29131 useless extension candidates. Maximal degree in co-relation 153184. Up to 7736 conditions per place. [2025-02-06 13:08:36,373 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 306 selfloop transitions, 471 changer transitions 0/788 dead transitions. [2025-02-06 13:08:36,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 788 transitions, 13593 flow [2025-02-06 13:08:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:08:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:08:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2025-02-06 13:08:36,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5580246913580247 [2025-02-06 13:08:36,374 INFO L175 Difference]: Start difference. First operand has 166 places, 676 transitions, 11268 flow. Second operand 9 states and 226 transitions. [2025-02-06 13:08:36,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 788 transitions, 13593 flow [2025-02-06 13:08:38,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 788 transitions, 13310 flow, removed 92 selfloop flow, removed 6 redundant places. [2025-02-06 13:08:38,940 INFO L231 Difference]: Finished difference. Result has 167 places, 679 transitions, 11957 flow [2025-02-06 13:08:38,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10980, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11957, PETRI_PLACES=167, PETRI_TRANSITIONS=679} [2025-02-06 13:08:38,940 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 120 predicate places. [2025-02-06 13:08:38,940 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 679 transitions, 11957 flow [2025-02-06 13:08:38,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 13:08:38,940 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:38,941 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, 1, 1] [2025-02-06 13:08:38,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 13:08:39,141 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 13:08:39,141 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:39,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1505842765, now seen corresponding path program 8 times [2025-02-06 13:08:39,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:39,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323233605] [2025-02-06 13:08:39,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:08:39,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:39,146 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:08:39,149 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:39,149 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:08:39,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:08:39,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:39,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323233605] [2025-02-06 13:08:39,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323233605] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:39,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:39,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:08:39,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035541253] [2025-02-06 13:08:39,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:39,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:08:39,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:39,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:08:39,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:08:39,236 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2025-02-06 13:08:39,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 679 transitions, 11957 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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 13:08:39,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:39,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2025-02-06 13:08:39,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:45,297 INFO L124 PetriNetUnfolderBase]: 30277/42527 cut-off events. [2025-02-06 13:08:45,297 INFO L125 PetriNetUnfolderBase]: For 446683/446683 co-relation queries the response was YES. [2025-02-06 13:08:45,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234927 conditions, 42527 events. 30277/42527 cut-off events. For 446683/446683 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 249642 event pairs, 9980 based on Foata normal form. 4/42531 useless extension candidates. Maximal degree in co-relation 230421. Up to 23903 conditions per place. [2025-02-06 13:08:46,161 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 841 selfloop transitions, 199 changer transitions 9/1050 dead transitions. [2025-02-06 13:08:46,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 1050 transitions, 18892 flow [2025-02-06 13:08:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:08:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:08:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2025-02-06 13:08:46,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5650793650793651 [2025-02-06 13:08:46,163 INFO L175 Difference]: Start difference. First operand has 167 places, 679 transitions, 11957 flow. Second operand 7 states and 178 transitions. [2025-02-06 13:08:46,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 1050 transitions, 18892 flow [2025-02-06 13:08:51,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 1050 transitions, 18613 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-02-06 13:08:51,325 INFO L231 Difference]: Finished difference. Result has 175 places, 793 transitions, 14955 flow [2025-02-06 13:08:51,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=11730, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14955, PETRI_PLACES=175, PETRI_TRANSITIONS=793} [2025-02-06 13:08:51,326 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 128 predicate places. [2025-02-06 13:08:51,326 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 793 transitions, 14955 flow [2025-02-06 13:08:51,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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 13:08:51,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:51,327 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, 1, 1] [2025-02-06 13:08:51,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-02-06 13:08:51,327 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:08:51,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash -967053159, now seen corresponding path program 9 times [2025-02-06 13:08:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:51,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142147977] [2025-02-06 13:08:51,327 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:08:51,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:51,333 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-02-06 13:08:51,335 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-02-06 13:08:51,335 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 13:08:51,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:51,385 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 13:08:51,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:51,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142147977] [2025-02-06 13:08:51,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142147977] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:51,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:51,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:08:51,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353567458] [2025-02-06 13:08:51,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:51,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:08:51,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:51,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:08:51,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:08:51,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2025-02-06 13:08:51,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 793 transitions, 14955 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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 13:08:51,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:51,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2025-02-06 13:08:51,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand