./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d 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/pthread-ext/09_fmaxsym.i -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 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:11:57,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:11:57,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:11:57,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:11:57,376 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:11:57,389 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:11:57,390 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:11:57,390 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:11:57,390 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:11:57,390 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:11:57,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:11:57,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:11:57,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:11:57,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:11:57,390 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:11:57,390 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:11:57,390 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:11:57,390 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:11:57,391 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:11:57,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:11:57,391 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:11:57,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:11:57,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:11:57,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:11:57,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:11:57,392 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:11:57,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:11:57,392 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 -> 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 [2025-02-08 08:11:57,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:11:57,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:11:57,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:11:57,566 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:11:57,566 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:11:57,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2025-02-08 08:11:58,768 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/62c7238b8/5bb18bbd37884604a59621aec08295c4/FLAG0e9b99a27 [2025-02-08 08:11:59,059 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:11:59,061 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2025-02-08 08:11:59,080 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/62c7238b8/5bb18bbd37884604a59621aec08295c4/FLAG0e9b99a27 [2025-02-08 08:11:59,341 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/62c7238b8/5bb18bbd37884604a59621aec08295c4 [2025-02-08 08:11:59,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:11:59,344 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:11:59,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:11:59,345 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:11:59,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:11:59,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9ba630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59, skipping insertion in model container [2025-02-08 08:11:59,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,375 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:11:59,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:11:59,595 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:11:59,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:11:59,659 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:11:59,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59 WrapperNode [2025-02-08 08:11:59,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:11:59,660 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:11:59,660 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:11:59,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:11:59,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,691 INFO L138 Inliner]: procedures = 164, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2025-02-08 08:11:59,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:11:59,692 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:11:59,692 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:11:59,692 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:11:59,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,701 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,708 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2025-02-08 08:11:59,708 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,708 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,712 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,713 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,715 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,716 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:11:59,716 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:11:59,717 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:11:59,717 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:11:59,717 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (1/1) ... [2025-02-08 08:11:59,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:11:59,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:11:59,755 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) [2025-02-08 08:11:59,757 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 [2025-02-08 08:11:59,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:11:59,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:11:59,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-08 08:11:59,771 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-02-08 08:11:59,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-02-08 08:11:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:11:59,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:11:59,773 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:11:59,848 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:11:59,850 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:11:59,996 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:11:59,997 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:12:00,124 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:12:00,124 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:12:00,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:12:00 BoogieIcfgContainer [2025-02-08 08:12:00,125 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:12:00,126 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:12:00,126 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:12:00,130 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:12:00,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:11:59" (1/3) ... [2025-02-08 08:12:00,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6445842c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:12:00, skipping insertion in model container [2025-02-08 08:12:00,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:11:59" (2/3) ... [2025-02-08 08:12:00,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6445842c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:12:00, skipping insertion in model container [2025-02-08 08:12:00,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:12:00" (3/3) ... [2025-02-08 08:12:00,133 INFO L128 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2025-02-08 08:12:00,142 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:12:00,144 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09_fmaxsym.i that has 2 procedures, 30 locations, 1 initial locations, 3 loop locations, and 6 error locations. [2025-02-08 08:12:00,145 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:12:00,183 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:12:00,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 72 flow [2025-02-08 08:12:00,231 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2025-02-08 08:12:00,232 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:12:00,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 4/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 54 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2025-02-08 08:12:00,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 72 flow [2025-02-08 08:12:00,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 34 transitions, 72 flow [2025-02-08 08:12:00,249 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:12:00,259 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;@314c7a3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:12:00,260 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2025-02-08 08:12:00,263 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:12:00,263 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:12:00,263 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:12:00,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:00,263 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:12:00,263 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2025-02-08 08:12:00,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash 235553, now seen corresponding path program 1 times [2025-02-08 08:12:00,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:00,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164901285] [2025-02-08 08:12:00,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:00,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:00,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:12:00,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:12:00,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:00,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:00,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:00,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164901285] [2025-02-08 08:12:00,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164901285] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:00,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:00,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:12:00,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728715128] [2025-02-08 08:12:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:00,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:12:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:00,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:12:00,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:12:00,513 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2025-02-08 08:12:00,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-02-08 08:12:00,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:00,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2025-02-08 08:12:00,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:00,551 INFO L124 PetriNetUnfolderBase]: 22/79 cut-off events. [2025-02-08 08:12:00,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:12:00,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 79 events. 22/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 175 event pairs, 18 based on Foata normal form. 6/84 useless extension candidates. Maximal degree in co-relation 121. Up to 56 conditions per place. [2025-02-08 08:12:00,553 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 16 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2025-02-08 08:12:00,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 90 flow [2025-02-08 08:12:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:12:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:12:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2025-02-08 08:12:00,562 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2025-02-08 08:12:00,563 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 72 flow. Second operand 3 states and 52 transitions. [2025-02-08 08:12:00,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 90 flow [2025-02-08 08:12:00,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:12:00,568 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 58 flow [2025-02-08 08:12:00,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2025-02-08 08:12:00,571 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2025-02-08 08:12:00,571 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 58 flow [2025-02-08 08:12:00,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-02-08 08:12:00,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:00,572 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:12:00,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:12:00,572 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2025-02-08 08:12:00,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash 235554, now seen corresponding path program 1 times [2025-02-08 08:12:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:00,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463138530] [2025-02-08 08:12:00,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:00,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:00,579 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:12:00,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:12:00,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:00,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:00,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:00,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463138530] [2025-02-08 08:12:00,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463138530] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:00,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:00,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:12:00,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376087334] [2025-02-08 08:12:00,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:00,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:12:00,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:00,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:12:00,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:12:00,708 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-02-08 08:12:00,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-02-08 08:12:00,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:00,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-02-08 08:12:00,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:00,761 INFO L124 PetriNetUnfolderBase]: 22/81 cut-off events. [2025-02-08 08:12:00,761 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:12:00,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 81 events. 22/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 175 event pairs, 18 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 140. Up to 58 conditions per place. [2025-02-08 08:12:00,761 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 18 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2025-02-08 08:12:00,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 102 flow [2025-02-08 08:12:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:12:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:12:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2025-02-08 08:12:00,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2025-02-08 08:12:00,765 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 58 flow. Second operand 3 states and 55 transitions. [2025-02-08 08:12:00,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 102 flow [2025-02-08 08:12:00,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:12:00,766 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 71 flow [2025-02-08 08:12:00,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2025-02-08 08:12:00,767 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2025-02-08 08:12:00,767 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 71 flow [2025-02-08 08:12:00,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-02-08 08:12:00,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:00,767 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:12:00,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:12:00,767 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2025-02-08 08:12:00,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash 226375191, now seen corresponding path program 1 times [2025-02-08 08:12:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:00,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725494882] [2025-02-08 08:12:00,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:00,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:12:00,788 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:12:00,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:00,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:00,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725494882] [2025-02-08 08:12:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725494882] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:12:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625007356] [2025-02-08 08:12:00,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:00,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:00,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:12:00,909 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) [2025-02-08 08:12:00,915 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 [2025-02-08 08:12:00,959 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:12:00,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:12:00,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:00,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:00,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:12:00,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:12:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:01,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:12:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:01,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625007356] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:12:01,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:12:01,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2025-02-08 08:12:01,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494496628] [2025-02-08 08:12:01,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:12:01,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:12:01,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:01,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:12:01,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:12:01,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-02-08 08:12:01,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 71 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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) [2025-02-08 08:12:01,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:01,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-02-08 08:12:01,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:01,286 INFO L124 PetriNetUnfolderBase]: 24/89 cut-off events. [2025-02-08 08:12:01,287 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:12:01,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 89 events. 24/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 197 event pairs, 18 based on Foata normal form. 1/89 useless extension candidates. Maximal degree in co-relation 166. Up to 60 conditions per place. [2025-02-08 08:12:01,287 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 21 selfloop transitions, 7 changer transitions 0/36 dead transitions. [2025-02-08 08:12:01,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 155 flow [2025-02-08 08:12:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:12:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:12:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2025-02-08 08:12:01,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2025-02-08 08:12:01,290 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 71 flow. Second operand 6 states and 98 transitions. [2025-02-08 08:12:01,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 155 flow [2025-02-08 08:12:01,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:12:01,293 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 121 flow [2025-02-08 08:12:01,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2025-02-08 08:12:01,293 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2025-02-08 08:12:01,294 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 121 flow [2025-02-08 08:12:01,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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) [2025-02-08 08:12:01,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:01,294 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-02-08 08:12:01,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-08 08:12:01,498 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 [2025-02-08 08:12:01,499 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2025-02-08 08:12:01,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1976653942, now seen corresponding path program 2 times [2025-02-08 08:12:01,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:01,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144925660] [2025-02-08 08:12:01,501 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:12:01,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:01,513 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-08 08:12:01,519 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:01,519 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:12:01,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:01,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:01,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144925660] [2025-02-08 08:12:01,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144925660] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:12:01,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700435736] [2025-02-08 08:12:01,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:12:01,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:01,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:12:01,701 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) [2025-02-08 08:12:01,703 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 [2025-02-08 08:12:01,738 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-08 08:12:01,751 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:01,751 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:12:01,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:01,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:12:01,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:12:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:01,983 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:12:01,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700435736] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:01,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:12:01,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2025-02-08 08:12:01,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014759413] [2025-02-08 08:12:01,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:01,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:12:01,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:01,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:12:01,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:12:02,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-02-08 08:12:02,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 121 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 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) [2025-02-08 08:12:02,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:02,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-02-08 08:12:02,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:02,071 INFO L124 PetriNetUnfolderBase]: 24/88 cut-off events. [2025-02-08 08:12:02,071 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-02-08 08:12:02,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 88 events. 24/88 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 196 event pairs, 18 based on Foata normal form. 1/89 useless extension candidates. Maximal degree in co-relation 175. Up to 56 conditions per place. [2025-02-08 08:12:02,072 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 17 selfloop transitions, 10 changer transitions 0/35 dead transitions. [2025-02-08 08:12:02,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 173 flow [2025-02-08 08:12:02,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:12:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:12:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2025-02-08 08:12:02,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2025-02-08 08:12:02,073 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 121 flow. Second operand 8 states and 116 transitions. [2025-02-08 08:12:02,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 173 flow [2025-02-08 08:12:02,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 147 flow, removed 7 selfloop flow, removed 5 redundant places. [2025-02-08 08:12:02,074 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 113 flow [2025-02-08 08:12:02,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=113, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2025-02-08 08:12:02,075 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2025-02-08 08:12:02,075 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 113 flow [2025-02-08 08:12:02,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 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) [2025-02-08 08:12:02,075 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:02,075 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2025-02-08 08:12:02,081 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 [2025-02-08 08:12:02,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:02,276 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2025-02-08 08:12:02,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2008073601, now seen corresponding path program 1 times [2025-02-08 08:12:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:02,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237388102] [2025-02-08 08:12:02,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:02,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:02,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:12:02,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:02,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:02,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:02,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:02,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237388102] [2025-02-08 08:12:02,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237388102] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:12:02,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990129892] [2025-02-08 08:12:02,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:02,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:12:02,313 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) [2025-02-08 08:12:02,314 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 [2025-02-08 08:12:02,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:12:02,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:02,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:02,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:02,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 08:12:02,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:12:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:02,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:12:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:02,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990129892] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:12:02,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:12:02,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-02-08 08:12:02,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562236234] [2025-02-08 08:12:02,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:12:02,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 08:12:02,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:02,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 08:12:02,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:12:02,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2025-02-08 08:12:02,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 113 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 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) [2025-02-08 08:12:02,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:02,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2025-02-08 08:12:02,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:02,448 INFO L124 PetriNetUnfolderBase]: 22/89 cut-off events. [2025-02-08 08:12:02,449 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 08:12:02,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 89 events. 22/89 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 172 event pairs, 18 based on Foata normal form. 4/93 useless extension candidates. Maximal degree in co-relation 181. Up to 55 conditions per place. [2025-02-08 08:12:02,451 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 20 selfloop transitions, 8 changer transitions 0/36 dead transitions. [2025-02-08 08:12:02,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 36 transitions, 186 flow [2025-02-08 08:12:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:12:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:12:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2025-02-08 08:12:02,452 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2025-02-08 08:12:02,452 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 113 flow. Second operand 8 states and 128 transitions. [2025-02-08 08:12:02,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 36 transitions, 186 flow [2025-02-08 08:12:02,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 168 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-02-08 08:12:02,453 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 125 flow [2025-02-08 08:12:02,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=125, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2025-02-08 08:12:02,453 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2025-02-08 08:12:02,454 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 125 flow [2025-02-08 08:12:02,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 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) [2025-02-08 08:12:02,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:02,454 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1] [2025-02-08 08:12:02,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:12:02,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:02,654 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2025-02-08 08:12:02,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash -902630955, now seen corresponding path program 2 times [2025-02-08 08:12:02,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:02,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208004605] [2025-02-08 08:12:02,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:12:02,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:02,664 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-08 08:12:02,682 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:12:02,683 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:12:02,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:12:02,683 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:12:02,690 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:12:02,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:12:02,698 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:02,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:12:02,714 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 08:12:02,715 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:12:02,715 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2025-02-08 08:12:02,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2025-02-08 08:12:02,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2025-02-08 08:12:02,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2025-02-08 08:12:02,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2025-02-08 08:12:02,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2025-02-08 08:12:02,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2025-02-08 08:12:02,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2025-02-08 08:12:02,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2025-02-08 08:12:02,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2025-02-08 08:12:02,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:12:02,717 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2025-02-08 08:12:02,718 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-08 08:12:02,718 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-02-08 08:12:02,733 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:12:02,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 122 flow [2025-02-08 08:12:02,738 INFO L124 PetriNetUnfolderBase]: 7/65 cut-off events. [2025-02-08 08:12:02,738 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:12:02,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 65 events. 7/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 140 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2025-02-08 08:12:02,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 56 transitions, 122 flow [2025-02-08 08:12:02,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 56 transitions, 122 flow [2025-02-08 08:12:02,743 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:12:02,743 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;@314c7a3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:12:02,743 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2025-02-08 08:12:02,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:12:02,744 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:12:02,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:12:02,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:02,744 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:12:02,744 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2025-02-08 08:12:02,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:02,744 INFO L85 PathProgramCache]: Analyzing trace with hash 291161, now seen corresponding path program 1 times [2025-02-08 08:12:02,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:02,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630173824] [2025-02-08 08:12:02,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:02,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:02,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:12:02,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:12:02,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:02,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:02,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:02,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630173824] [2025-02-08 08:12:02,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630173824] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:02,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:02,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:12:02,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368801054] [2025-02-08 08:12:02,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:02,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:12:02,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:02,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:12:02,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:12:02,787 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 56 [2025-02-08 08:12:02,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-02-08 08:12:02,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:02,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 56 [2025-02-08 08:12:02,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:02,907 INFO L124 PetriNetUnfolderBase]: 532/1126 cut-off events. [2025-02-08 08:12:02,908 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-02-08 08:12:02,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2028 conditions, 1126 events. 532/1126 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6120 event pairs, 468 based on Foata normal form. 123/1233 useless extension candidates. Maximal degree in co-relation 1291. Up to 866 conditions per place. [2025-02-08 08:12:02,917 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 27 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2025-02-08 08:12:02,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 154 flow [2025-02-08 08:12:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:12:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:12:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2025-02-08 08:12:02,919 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2025-02-08 08:12:02,919 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 122 flow. Second operand 3 states and 87 transitions. [2025-02-08 08:12:02,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 154 flow [2025-02-08 08:12:02,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 154 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:12:02,921 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 100 flow [2025-02-08 08:12:02,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2025-02-08 08:12:02,921 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2025-02-08 08:12:02,922 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 100 flow [2025-02-08 08:12:02,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-02-08 08:12:02,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:02,923 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:12:02,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-08 08:12:02,923 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2025-02-08 08:12:02,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:02,923 INFO L85 PathProgramCache]: Analyzing trace with hash 291162, now seen corresponding path program 1 times [2025-02-08 08:12:02,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:02,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995540685] [2025-02-08 08:12:02,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:02,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:12:02,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:12:02,930 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:02,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:02,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:02,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995540685] [2025-02-08 08:12:02,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995540685] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:02,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:02,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:12:02,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667223494] [2025-02-08 08:12:02,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:02,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:12:02,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:02,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:12:02,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:12:02,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2025-02-08 08:12:02,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2025-02-08 08:12:02,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:02,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2025-02-08 08:12:02,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:03,115 INFO L124 PetriNetUnfolderBase]: 532/1128 cut-off events. [2025-02-08 08:12:03,115 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-02-08 08:12:03,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 1128 events. 532/1128 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6132 event pairs, 468 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 2027. Up to 868 conditions per place. [2025-02-08 08:12:03,119 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 29 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2025-02-08 08:12:03,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 166 flow [2025-02-08 08:12:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:12:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:12:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2025-02-08 08:12:03,120 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2025-02-08 08:12:03,120 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 100 flow. Second operand 3 states and 90 transitions. [2025-02-08 08:12:03,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 166 flow [2025-02-08 08:12:03,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:12:03,121 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 113 flow [2025-02-08 08:12:03,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2025-02-08 08:12:03,122 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2025-02-08 08:12:03,122 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 113 flow [2025-02-08 08:12:03,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2025-02-08 08:12:03,122 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:03,122 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:12:03,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:12:03,123 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2025-02-08 08:12:03,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash 279816271, now seen corresponding path program 1 times [2025-02-08 08:12:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:03,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691546839] [2025-02-08 08:12:03,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:03,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:12:03,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:12:03,128 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:03,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691546839] [2025-02-08 08:12:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691546839] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:12:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283347442] [2025-02-08 08:12:03,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:03,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:12:03,168 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) [2025-02-08 08:12:03,175 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 [2025-02-08 08:12:03,209 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:12:03,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:12:03,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:03,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:03,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:12:03,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:12:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:03,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:12:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:03,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283347442] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:12:03,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:12:03,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2025-02-08 08:12:03,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282150107] [2025-02-08 08:12:03,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:12:03,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:12:03,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:03,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:12:03,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:12:03,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2025-02-08 08:12:03,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 113 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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) [2025-02-08 08:12:03,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:03,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2025-02-08 08:12:03,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:03,517 INFO L124 PetriNetUnfolderBase]: 534/1136 cut-off events. [2025-02-08 08:12:03,517 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-02-08 08:12:03,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 1136 events. 534/1136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6148 event pairs, 468 based on Foata normal form. 1/1121 useless extension candidates. Maximal degree in co-relation 2053. Up to 870 conditions per place. [2025-02-08 08:12:03,523 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 32 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2025-02-08 08:12:03,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 219 flow [2025-02-08 08:12:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:12:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:12:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2025-02-08 08:12:03,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2025-02-08 08:12:03,524 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 113 flow. Second operand 6 states and 157 transitions. [2025-02-08 08:12:03,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 219 flow [2025-02-08 08:12:03,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:12:03,525 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 163 flow [2025-02-08 08:12:03,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2025-02-08 08:12:03,525 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2025-02-08 08:12:03,526 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 163 flow [2025-02-08 08:12:03,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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) [2025-02-08 08:12:03,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:03,526 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-02-08 08:12:03,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:12:03,726 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,SelfDestructingSolverStorable8 [2025-02-08 08:12:03,727 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2025-02-08 08:12:03,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:03,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1791027794, now seen corresponding path program 2 times [2025-02-08 08:12:03,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:03,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496611680] [2025-02-08 08:12:03,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:12:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:03,733 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-08 08:12:03,738 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:03,738 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:12:03,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:03,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:03,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496611680] [2025-02-08 08:12:03,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496611680] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:12:03,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235818388] [2025-02-08 08:12:03,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:12:03,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:03,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:12:03,882 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) [2025-02-08 08:12:03,884 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 [2025-02-08 08:12:03,925 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-08 08:12:03,937 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:03,937 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:12:03,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:03,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:12:03,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:12:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:04,076 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:12:04,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235818388] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:04,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:12:04,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2025-02-08 08:12:04,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038623725] [2025-02-08 08:12:04,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:04,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:12:04,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:04,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:12:04,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:12:04,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2025-02-08 08:12:04,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 163 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 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) [2025-02-08 08:12:04,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:04,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2025-02-08 08:12:04,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:04,235 INFO L124 PetriNetUnfolderBase]: 534/1135 cut-off events. [2025-02-08 08:12:04,236 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2025-02-08 08:12:04,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1135 events. 534/1135 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6133 event pairs, 468 based on Foata normal form. 1/1121 useless extension candidates. Maximal degree in co-relation 2062. Up to 866 conditions per place. [2025-02-08 08:12:04,240 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 28 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2025-02-08 08:12:04,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 237 flow [2025-02-08 08:12:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:12:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:12:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2025-02-08 08:12:04,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4263392857142857 [2025-02-08 08:12:04,241 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 163 flow. Second operand 8 states and 191 transitions. [2025-02-08 08:12:04,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 237 flow [2025-02-08 08:12:04,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 211 flow, removed 7 selfloop flow, removed 5 redundant places. [2025-02-08 08:12:04,243 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 155 flow [2025-02-08 08:12:04,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=155, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2025-02-08 08:12:04,243 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2025-02-08 08:12:04,243 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 155 flow [2025-02-08 08:12:04,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 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) [2025-02-08 08:12:04,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:04,243 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:12:04,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:12:04,444 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,SelfDestructingSolverStorable9 [2025-02-08 08:12:04,444 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2025-02-08 08:12:04,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1758931277, now seen corresponding path program 1 times [2025-02-08 08:12:04,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:04,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778368991] [2025-02-08 08:12:04,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:04,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:04,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:12:04,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:04,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:04,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:04,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778368991] [2025-02-08 08:12:04,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778368991] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:12:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225133065] [2025-02-08 08:12:04,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:04,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:04,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:12:04,490 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) [2025-02-08 08:12:04,491 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 [2025-02-08 08:12:04,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:12:04,539 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:04,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:04,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:04,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 08:12:04,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:12:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:04,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:12:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:04,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225133065] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:12:04,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:12:04,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-02-08 08:12:04,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573545780] [2025-02-08 08:12:04,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:12:04,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 08:12:04,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:04,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 08:12:04,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:12:04,585 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2025-02-08 08:12:04,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 155 flow. Second operand has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 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) [2025-02-08 08:12:04,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:04,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2025-02-08 08:12:04,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:04,711 INFO L124 PetriNetUnfolderBase]: 532/1136 cut-off events. [2025-02-08 08:12:04,711 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-02-08 08:12:04,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2080 conditions, 1136 events. 532/1136 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6111 event pairs, 468 based on Foata normal form. 4/1125 useless extension candidates. Maximal degree in co-relation 2068. Up to 865 conditions per place. [2025-02-08 08:12:04,715 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 31 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2025-02-08 08:12:04,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 250 flow [2025-02-08 08:12:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:12:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:12:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2025-02-08 08:12:04,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.453125 [2025-02-08 08:12:04,717 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 155 flow. Second operand 8 states and 203 transitions. [2025-02-08 08:12:04,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 250 flow [2025-02-08 08:12:04,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 232 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-02-08 08:12:04,718 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 167 flow [2025-02-08 08:12:04,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=167, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2025-02-08 08:12:04,719 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2025-02-08 08:12:04,719 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 167 flow [2025-02-08 08:12:04,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 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) [2025-02-08 08:12:04,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:04,719 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:12:04,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 08:12:04,919 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,SelfDestructingSolverStorable10 [2025-02-08 08:12:04,920 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2025-02-08 08:12:04,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash -806099193, now seen corresponding path program 2 times [2025-02-08 08:12:04,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:04,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489727909] [2025-02-08 08:12:04,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:12:04,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:04,928 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-08 08:12:04,931 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 19 statements. [2025-02-08 08:12:04,931 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:12:04,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-08 08:12:05,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:05,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489727909] [2025-02-08 08:12:05,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489727909] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:05,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:05,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:12:05,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844627766] [2025-02-08 08:12:05,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:05,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:12:05,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:05,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:12:05,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:12:05,033 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2025-02-08 08:12:05,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:12:05,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:05,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2025-02-08 08:12:05,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:05,249 INFO L124 PetriNetUnfolderBase]: 1009/2083 cut-off events. [2025-02-08 08:12:05,249 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-02-08 08:12:05,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 2083 events. 1009/2083 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 12217 event pairs, 168 based on Foata normal form. 33/2080 useless extension candidates. Maximal degree in co-relation 3822. Up to 688 conditions per place. [2025-02-08 08:12:05,256 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 65 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2025-02-08 08:12:05,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 385 flow [2025-02-08 08:12:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:12:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:12:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2025-02-08 08:12:05,257 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-02-08 08:12:05,258 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 167 flow. Second operand 5 states and 160 transitions. [2025-02-08 08:12:05,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 385 flow [2025-02-08 08:12:05,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 377 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:12:05,259 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 186 flow [2025-02-08 08:12:05,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2025-02-08 08:12:05,260 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2025-02-08 08:12:05,260 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 186 flow [2025-02-08 08:12:05,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:12:05,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:05,260 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 2, 1, 1, 1, 1, 1] [2025-02-08 08:12:05,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 08:12:05,261 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2025-02-08 08:12:05,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1430294087, now seen corresponding path program 1 times [2025-02-08 08:12:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:05,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785282387] [2025-02-08 08:12:05,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:05,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:12:05,273 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:12:05,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:05,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:12:05,274 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:12:05,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:12:05,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:12:05,280 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:05,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:12:05,284 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 08:12:05,284 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2025-02-08 08:12:05,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2025-02-08 08:12:05,285 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2025-02-08 08:12:05,285 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2025-02-08 08:12:05,285 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2025-02-08 08:12:05,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 08:12:05,285 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2025-02-08 08:12:05,285 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-08 08:12:05,285 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-02-08 08:12:05,302 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:12:05,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2025-02-08 08:12:05,308 INFO L124 PetriNetUnfolderBase]: 10/92 cut-off events. [2025-02-08 08:12:05,309 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-08 08:12:05,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 10/92 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 254 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2025-02-08 08:12:05,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 174 flow [2025-02-08 08:12:05,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 174 flow [2025-02-08 08:12:05,310 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:12:05,310 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;@314c7a3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:12:05,311 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2025-02-08 08:12:05,311 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:12:05,311 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:12:05,311 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:12:05,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:05,311 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:12:05,312 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2025-02-08 08:12:05,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash 368615, now seen corresponding path program 1 times [2025-02-08 08:12:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589873732] [2025-02-08 08:12:05,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:05,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:05,315 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:12:05,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:12:05,316 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:05,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:05,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:05,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589873732] [2025-02-08 08:12:05,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589873732] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:05,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:05,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:12:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673115714] [2025-02-08 08:12:05,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:05,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:12:05,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:05,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:12:05,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:12:05,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 78 [2025-02-08 08:12:05,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2025-02-08 08:12:05,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:05,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 78 [2025-02-08 08:12:05,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:06,161 INFO L124 PetriNetUnfolderBase]: 8632/14646 cut-off events. [2025-02-08 08:12:06,161 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2025-02-08 08:12:06,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27049 conditions, 14646 events. 8632/14646 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 106901 event pairs, 7668 based on Foata normal form. 1878/16295 useless extension candidates. Maximal degree in co-relation 8570. Up to 11966 conditions per place. [2025-02-08 08:12:06,233 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 38 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2025-02-08 08:12:06,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 220 flow [2025-02-08 08:12:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:12:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:12:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2025-02-08 08:12:06,235 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2025-02-08 08:12:06,236 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 174 flow. Second operand 3 states and 122 transitions. [2025-02-08 08:12:06,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 220 flow [2025-02-08 08:12:06,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 218 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-02-08 08:12:06,238 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 142 flow [2025-02-08 08:12:06,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2025-02-08 08:12:06,240 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, -8 predicate places. [2025-02-08 08:12:06,240 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 142 flow [2025-02-08 08:12:06,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2025-02-08 08:12:06,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:06,240 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:12:06,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-08 08:12:06,240 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2025-02-08 08:12:06,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash 368616, now seen corresponding path program 1 times [2025-02-08 08:12:06,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:06,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963384110] [2025-02-08 08:12:06,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:06,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:06,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:12:06,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:12:06,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:06,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:06,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:06,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963384110] [2025-02-08 08:12:06,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963384110] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:06,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:06,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:12:06,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715009718] [2025-02-08 08:12:06,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:06,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:12:06,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:06,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:12:06,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:12:06,295 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2025-02-08 08:12:06,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:12:06,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:06,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2025-02-08 08:12:06,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:07,076 INFO L124 PetriNetUnfolderBase]: 8632/14648 cut-off events. [2025-02-08 08:12:07,076 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2025-02-08 08:12:07,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26956 conditions, 14648 events. 8632/14648 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 106900 event pairs, 7668 based on Foata normal form. 0/14418 useless extension candidates. Maximal degree in co-relation 26947. Up to 11968 conditions per place. [2025-02-08 08:12:07,124 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 40 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2025-02-08 08:12:07,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 230 flow [2025-02-08 08:12:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:12:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:12:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2025-02-08 08:12:07,125 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2025-02-08 08:12:07,125 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 142 flow. Second operand 3 states and 125 transitions. [2025-02-08 08:12:07,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 230 flow [2025-02-08 08:12:07,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:12:07,128 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 155 flow [2025-02-08 08:12:07,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2025-02-08 08:12:07,129 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2025-02-08 08:12:07,130 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 155 flow [2025-02-08 08:12:07,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:12:07,130 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:07,130 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:12:07,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-08 08:12:07,130 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2025-02-08 08:12:07,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash 354252061, now seen corresponding path program 1 times [2025-02-08 08:12:07,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:07,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317440051] [2025-02-08 08:12:07,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:07,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:12:07,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:12:07,136 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:07,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:07,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:07,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317440051] [2025-02-08 08:12:07,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317440051] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:12:07,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079061401] [2025-02-08 08:12:07,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:07,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:12:07,175 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) [2025-02-08 08:12:07,180 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 [2025-02-08 08:12:07,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:12:07,230 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:12:07,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:07,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:07,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:12:07,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:12:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:07,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:12:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:07,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079061401] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:12:07,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:12:07,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2025-02-08 08:12:07,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576211272] [2025-02-08 08:12:07,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:12:07,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:12:07,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:07,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:12:07,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:12:07,342 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2025-02-08 08:12:07,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 155 flow. Second operand has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 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) [2025-02-08 08:12:07,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:07,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2025-02-08 08:12:07,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:08,159 INFO L124 PetriNetUnfolderBase]: 8634/14656 cut-off events. [2025-02-08 08:12:08,159 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2025-02-08 08:12:08,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26984 conditions, 14656 events. 8634/14656 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 106977 event pairs, 7668 based on Foata normal form. 1/14428 useless extension candidates. Maximal degree in co-relation 26973. Up to 11970 conditions per place. [2025-02-08 08:12:08,225 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 43 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2025-02-08 08:12:08,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 283 flow [2025-02-08 08:12:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:12:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:12:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2025-02-08 08:12:08,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2025-02-08 08:12:08,227 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 155 flow. Second operand 6 states and 216 transitions. [2025-02-08 08:12:08,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 283 flow [2025-02-08 08:12:08,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:12:08,228 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 205 flow [2025-02-08 08:12:08,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2025-02-08 08:12:08,229 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2025-02-08 08:12:08,229 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 205 flow [2025-02-08 08:12:08,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 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) [2025-02-08 08:12:08,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:08,229 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-02-08 08:12:08,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 08:12:08,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:08,430 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2025-02-08 08:12:08,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:08,431 INFO L85 PathProgramCache]: Analyzing trace with hash -596419268, now seen corresponding path program 2 times [2025-02-08 08:12:08,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:08,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063733309] [2025-02-08 08:12:08,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:12:08,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:08,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-08 08:12:08,441 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:08,442 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:12:08,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:08,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:08,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063733309] [2025-02-08 08:12:08,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063733309] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:12:08,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778434232] [2025-02-08 08:12:08,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:12:08,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:12:08,581 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) [2025-02-08 08:12:08,584 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 [2025-02-08 08:12:08,629 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-08 08:12:08,640 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:08,640 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:12:08,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:08,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:12:08,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:12:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:08,773 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:12:08,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778434232] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:08,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:12:08,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2025-02-08 08:12:08,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418044224] [2025-02-08 08:12:08,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:08,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:12:08,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:08,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:12:08,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:12:08,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2025-02-08 08:12:08,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 28.375) internal successors, (227), 8 states have internal predecessors, (227), 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) [2025-02-08 08:12:08,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:08,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2025-02-08 08:12:08,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:09,527 INFO L124 PetriNetUnfolderBase]: 8634/14655 cut-off events. [2025-02-08 08:12:09,527 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2025-02-08 08:12:09,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26997 conditions, 14655 events. 8634/14655 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 106915 event pairs, 7668 based on Foata normal form. 1/14428 useless extension candidates. Maximal degree in co-relation 26982. Up to 11966 conditions per place. [2025-02-08 08:12:09,586 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 39 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2025-02-08 08:12:09,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 301 flow [2025-02-08 08:12:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:12:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:12:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 266 transitions. [2025-02-08 08:12:09,587 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42628205128205127 [2025-02-08 08:12:09,587 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 205 flow. Second operand 8 states and 266 transitions. [2025-02-08 08:12:09,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 301 flow [2025-02-08 08:12:09,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 275 flow, removed 7 selfloop flow, removed 5 redundant places. [2025-02-08 08:12:09,589 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 197 flow [2025-02-08 08:12:09,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2025-02-08 08:12:09,589 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2025-02-08 08:12:09,589 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 197 flow [2025-02-08 08:12:09,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.375) internal successors, (227), 8 states have internal predecessors, (227), 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) [2025-02-08 08:12:09,589 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:09,589 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:12:09,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 08:12:09,794 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,SelfDestructingSolverStorable16 [2025-02-08 08:12:09,794 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2025-02-08 08:12:09,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash -563697140, now seen corresponding path program 1 times [2025-02-08 08:12:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:09,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590923323] [2025-02-08 08:12:09,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:09,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:12:09,802 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:09,802 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:09,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:09,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590923323] [2025-02-08 08:12:09,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590923323] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:12:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616118640] [2025-02-08 08:12:09,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:09,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:12:09,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:12:09,829 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) [2025-02-08 08:12:09,836 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 [2025-02-08 08:12:09,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:12:09,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:12:09,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:09,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:09,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 08:12:09,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:12:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:09,898 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:12:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616118640] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:12:09,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:12:09,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-02-08 08:12:09,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426038393] [2025-02-08 08:12:09,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:12:09,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 08:12:09,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:09,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 08:12:09,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:12:09,921 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 78 [2025-02-08 08:12:09,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 197 flow. Second operand has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 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) [2025-02-08 08:12:09,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:09,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 78 [2025-02-08 08:12:09,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:10,681 INFO L124 PetriNetUnfolderBase]: 8632/14656 cut-off events. [2025-02-08 08:12:10,681 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2025-02-08 08:12:10,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27001 conditions, 14656 events. 8632/14656 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 106908 event pairs, 7668 based on Foata normal form. 4/14432 useless extension candidates. Maximal degree in co-relation 26988. Up to 11965 conditions per place. [2025-02-08 08:12:10,728 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 42 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2025-02-08 08:12:10,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 314 flow [2025-02-08 08:12:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:12:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:12:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 278 transitions. [2025-02-08 08:12:10,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2025-02-08 08:12:10,730 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 197 flow. Second operand 8 states and 278 transitions. [2025-02-08 08:12:10,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 314 flow [2025-02-08 08:12:10,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 296 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-02-08 08:12:10,731 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 209 flow [2025-02-08 08:12:10,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2025-02-08 08:12:10,732 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 7 predicate places. [2025-02-08 08:12:10,732 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 209 flow [2025-02-08 08:12:10,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 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) [2025-02-08 08:12:10,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:10,732 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:12:10,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 08:12:10,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 08:12:10,933 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2025-02-08 08:12:10,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash 708563808, now seen corresponding path program 2 times [2025-02-08 08:12:10,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:10,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831272241] [2025-02-08 08:12:10,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:12:10,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:10,939 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-08 08:12:10,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 19 statements. [2025-02-08 08:12:10,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:12:10,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-08 08:12:11,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:11,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831272241] [2025-02-08 08:12:11,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831272241] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:11,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:11,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:12:11,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186536092] [2025-02-08 08:12:11,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:11,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:12:11,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:11,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:12:11,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:12:11,035 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2025-02-08 08:12:11,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:12:11,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:11,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2025-02-08 08:12:11,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:12,695 INFO L124 PetriNetUnfolderBase]: 16399/27295 cut-off events. [2025-02-08 08:12:12,695 INFO L125 PetriNetUnfolderBase]: For 662/662 co-relation queries the response was YES. [2025-02-08 08:12:12,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50709 conditions, 27295 events. 16399/27295 cut-off events. For 662/662 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 207543 event pairs, 5643 based on Foata normal form. 333/27052 useless extension candidates. Maximal degree in co-relation 50694. Up to 9568 conditions per place. [2025-02-08 08:12:12,852 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 98 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2025-02-08 08:12:12,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 124 transitions, 547 flow [2025-02-08 08:12:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:12:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:12:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2025-02-08 08:12:12,854 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5974358974358974 [2025-02-08 08:12:12,854 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 209 flow. Second operand 5 states and 233 transitions. [2025-02-08 08:12:12,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 124 transitions, 547 flow [2025-02-08 08:12:12,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 539 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:12:12,856 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 228 flow [2025-02-08 08:12:12,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2025-02-08 08:12:12,857 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 9 predicate places. [2025-02-08 08:12:12,857 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 228 flow [2025-02-08 08:12:12,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:12:12,857 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:12,857 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:12:12,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-08 08:12:12,857 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2025-02-08 08:12:12,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1830120246, now seen corresponding path program 1 times [2025-02-08 08:12:12,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:12,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659217156] [2025-02-08 08:12:12,858 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:12,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:12,865 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:12:12,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:12:12,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:12,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-08 08:12:12,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:12,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659217156] [2025-02-08 08:12:12,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659217156] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:12,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:12,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:12:12,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651830899] [2025-02-08 08:12:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:12,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:12:12,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:12,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:12:12,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:12:13,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2025-02-08 08:12:13,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 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) [2025-02-08 08:12:13,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:13,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2025-02-08 08:12:13,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:15,473 INFO L124 PetriNetUnfolderBase]: 29468/48959 cut-off events. [2025-02-08 08:12:15,473 INFO L125 PetriNetUnfolderBase]: For 8329/8812 co-relation queries the response was YES. [2025-02-08 08:12:15,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96680 conditions, 48959 events. 29468/48959 cut-off events. For 8329/8812 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 397486 event pairs, 7462 based on Foata normal form. 594/48647 useless extension candidates. Maximal degree in co-relation 96662. Up to 17136 conditions per place. [2025-02-08 08:12:15,806 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 102 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2025-02-08 08:12:15,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 604 flow [2025-02-08 08:12:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:12:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:12:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2025-02-08 08:12:15,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5923076923076923 [2025-02-08 08:12:15,807 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 228 flow. Second operand 5 states and 231 transitions. [2025-02-08 08:12:15,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 604 flow [2025-02-08 08:12:15,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 603 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:12:15,821 INFO L231 Difference]: Finished difference. Result has 89 places, 72 transitions, 254 flow [2025-02-08 08:12:15,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=72} [2025-02-08 08:12:15,823 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 14 predicate places. [2025-02-08 08:12:15,823 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 72 transitions, 254 flow [2025-02-08 08:12:15,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 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) [2025-02-08 08:12:15,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:15,823 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1] [2025-02-08 08:12:15,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-08 08:12:15,823 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2025-02-08 08:12:15,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1348872166, now seen corresponding path program 1 times [2025-02-08 08:12:15,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:15,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499245193] [2025-02-08 08:12:15,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:15,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:15,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:12:15,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:12:15,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:15,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:12:15,850 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:12:15,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:12:15,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:12:15,867 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:15,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:12:15,872 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 08:12:15,876 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2025-02-08 08:12:15,877 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2025-02-08 08:12:15,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-08 08:12:15,877 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2025-02-08 08:12:15,878 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-08 08:12:15,878 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-02-08 08:12:15,922 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:12:15,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 100 transitions, 228 flow [2025-02-08 08:12:15,927 INFO L124 PetriNetUnfolderBase]: 13/119 cut-off events. [2025-02-08 08:12:15,927 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-08 08:12:15,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 119 events. 13/119 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 382 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 100. Up to 5 conditions per place. [2025-02-08 08:12:15,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 100 transitions, 228 flow [2025-02-08 08:12:15,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 100 transitions, 228 flow [2025-02-08 08:12:15,929 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:12:15,929 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;@314c7a3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:12:15,929 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2025-02-08 08:12:15,930 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:12:15,930 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:12:15,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:12:15,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:15,930 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:12:15,930 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2025-02-08 08:12:15,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash 467915, now seen corresponding path program 1 times [2025-02-08 08:12:15,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:15,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540488622] [2025-02-08 08:12:15,931 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:15,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:15,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:12:15,936 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:12:15,936 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:15,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:15,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:15,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540488622] [2025-02-08 08:12:15,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540488622] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:15,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:15,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:12:15,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592990004] [2025-02-08 08:12:15,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:15,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:12:15,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:15,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:12:15,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:12:15,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2025-02-08 08:12:15,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 100 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2025-02-08 08:12:15,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:15,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2025-02-08 08:12:15,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:25,257 INFO L124 PetriNetUnfolderBase]: 119632/179862 cut-off events. [2025-02-08 08:12:25,258 INFO L125 PetriNetUnfolderBase]: For 11960/11960 co-relation queries the response was YES. [2025-02-08 08:12:25,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338266 conditions, 179862 events. 119632/179862 cut-off events. For 11960/11960 co-relation queries the response was YES. Maximal size of possible extension queue 4923. Compared 1519196 event pairs, 106668 based on Foata normal form. 25424/202906 useless extension candidates. Maximal degree in co-relation 27148. Up to 152966 conditions per place. [2025-02-08 08:12:26,139 INFO L140 encePairwiseOnDemand]: 85/100 looper letters, 49 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2025-02-08 08:12:26,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 288 flow [2025-02-08 08:12:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:12:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:12:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2025-02-08 08:12:26,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5233333333333333 [2025-02-08 08:12:26,141 INFO L175 Difference]: Start difference. First operand has 96 places, 100 transitions, 228 flow. Second operand 3 states and 157 transitions. [2025-02-08 08:12:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 288 flow [2025-02-08 08:12:26,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 282 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-02-08 08:12:26,145 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 184 flow [2025-02-08 08:12:26,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2025-02-08 08:12:26,146 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -10 predicate places. [2025-02-08 08:12:26,146 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 184 flow [2025-02-08 08:12:26,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2025-02-08 08:12:26,146 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:12:26,146 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:12:26,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-08 08:12:26,146 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2025-02-08 08:12:26,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:12:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash 467916, now seen corresponding path program 1 times [2025-02-08 08:12:26,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:12:26,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140509606] [2025-02-08 08:12:26,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:12:26,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:12:26,149 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:12:26,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:12:26,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:12:26,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:12:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:12:26,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:12:26,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140509606] [2025-02-08 08:12:26,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140509606] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:12:26,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:12:26,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:12:26,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647560160] [2025-02-08 08:12:26,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:12:26,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:12:26,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:12:26,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:12:26,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:12:26,188 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 100 [2025-02-08 08:12:26,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2025-02-08 08:12:26,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:12:26,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 100 [2025-02-08 08:12:26,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:12:35,493 INFO L124 PetriNetUnfolderBase]: 119632/179864 cut-off events. [2025-02-08 08:12:35,493 INFO L125 PetriNetUnfolderBase]: For 4712/4712 co-relation queries the response was YES.