./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:02:07,749 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:02:07,818 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:02:07,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:02:07,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:02:07,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:02:07,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:02:07,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:02:07,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:02:07,848 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:02:07,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:02:07,848 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:02:07,849 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:02:07,849 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:02:07,849 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:02:07,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:02:07,849 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:02:07,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:02:07,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:02:07,849 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:02:07,851 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:02:07,851 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:02:07,851 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:02:07,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:02:07,852 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:02:07,852 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:02:07,852 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:02:07,852 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:02:07,852 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:02:07,852 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:07,853 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:02:07,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:02:07,853 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 -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2025-02-06 13:02:08,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:02:08,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:02:08,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:02:08,150 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:02:08,151 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:02:08,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2025-02-06 13:02:09,410 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a012819e4/b1c12e8ba86541f590a9b375608403b8/FLAG2fb16776e [2025-02-06 13:02:09,706 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:02:09,709 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2025-02-06 13:02:09,720 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a012819e4/b1c12e8ba86541f590a9b375608403b8/FLAG2fb16776e [2025-02-06 13:02:09,989 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a012819e4/b1c12e8ba86541f590a9b375608403b8 [2025-02-06 13:02:09,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:02:09,995 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:02:09,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:09,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:02:10,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:02:10,004 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:09" (1/1) ... [2025-02-06 13:02:10,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6bf1fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10, skipping insertion in model container [2025-02-06 13:02:10,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:09" (1/1) ... [2025-02-06 13:02:10,024 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:02:10,175 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:02:10,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:10,188 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:02:10,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:10,253 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:02:10,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10 WrapperNode [2025-02-06 13:02:10,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:10,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:10,256 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:02:10,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:02:10,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,309 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 300 [2025-02-06 13:02:10,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:10,311 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:02:10,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:02:10,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:02:10,321 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,329 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,354 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 13:02:10,354 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,355 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,362 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,363 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,364 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:02:10,369 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:02:10,369 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:02:10,369 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:02:10,369 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (1/1) ... [2025-02-06 13:02:10,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:10,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:10,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:02:10,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:02:10,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:02:10,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:02:10,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:02:10,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:02:10,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:02:10,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:02:10,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:02:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:02:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:02:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:02:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:02:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:02:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:02:10,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:02:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:02:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:02:10,434 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:02:10,558 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:02:10,560 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:02:11,136 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:02:11,137 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:02:11,581 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:02:11,582 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:02:11,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:11 BoogieIcfgContainer [2025-02-06 13:02:11,582 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:02:11,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:02:11,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:02:11,589 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:02:11,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:02:09" (1/3) ... [2025-02-06 13:02:11,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b48f3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:11, skipping insertion in model container [2025-02-06 13:02:11,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:10" (2/3) ... [2025-02-06 13:02:11,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b48f3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:11, skipping insertion in model container [2025-02-06 13:02:11,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:11" (3/3) ... [2025-02-06 13:02:11,594 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2025-02-06 13:02:11,611 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:02:11,613 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-trans.wvr.c that has 4 procedures, 44 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2025-02-06 13:02:11,613 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:02:11,696 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:02:11,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 50 transitions, 121 flow [2025-02-06 13:02:11,768 INFO L124 PetriNetUnfolderBase]: 7/47 cut-off events. [2025-02-06 13:02:11,776 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:02:11,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 7/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2025-02-06 13:02:11,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 50 transitions, 121 flow [2025-02-06 13:02:11,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 46 transitions, 110 flow [2025-02-06 13:02:11,804 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:02:11,819 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;@17d3b334, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:02:11,820 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2025-02-06 13:02:11,826 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:02:11,826 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:02:11,826 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:02:11,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:11,827 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:11,827 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:11,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash 799859, now seen corresponding path program 1 times [2025-02-06 13:02:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:11,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88340539] [2025-02-06 13:02:11,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:11,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:11,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:11,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:11,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:11,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:12,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88340539] [2025-02-06 13:02:12,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88340539] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:12,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:12,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:02:12,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374003137] [2025-02-06 13:02:12,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:12,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:12,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:12,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:12,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:12,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:12,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:12,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:12,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:12,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:12,633 INFO L124 PetriNetUnfolderBase]: 1316/2103 cut-off events. [2025-02-06 13:02:12,633 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2025-02-06 13:02:12,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 2103 events. 1316/2103 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10097 event pairs, 1060 based on Foata normal form. 1/1737 useless extension candidates. Maximal degree in co-relation 3810. Up to 1877 conditions per place. [2025-02-06 13:02:12,658 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2025-02-06 13:02:12,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 162 flow [2025-02-06 13:02:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2025-02-06 13:02:12,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2025-02-06 13:02:12,676 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 110 flow. Second operand 3 states and 73 transitions. [2025-02-06 13:02:12,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 162 flow [2025-02-06 13:02:12,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:02:12,691 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 90 flow [2025-02-06 13:02:12,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2025-02-06 13:02:12,698 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2025-02-06 13:02:12,698 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 90 flow [2025-02-06 13:02:12,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:12,699 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:12,699 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:12,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:02:12,699 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:12,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash 799860, now seen corresponding path program 1 times [2025-02-06 13:02:12,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:12,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048182743] [2025-02-06 13:02:12,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:12,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:12,719 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:12,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:12,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:12,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:12,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:12,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048182743] [2025-02-06 13:02:12,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048182743] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:12,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:12,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:12,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224580435] [2025-02-06 13:02:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:12,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:12,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:12,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:12,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:13,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:13,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:13,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:13,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:13,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:13,368 INFO L124 PetriNetUnfolderBase]: 1316/2105 cut-off events. [2025-02-06 13:02:13,369 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-02-06 13:02:13,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4035 conditions, 2105 events. 1316/2105 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10101 event pairs, 1060 based on Foata normal form. 1/1739 useless extension candidates. Maximal degree in co-relation 4016. Up to 1881 conditions per place. [2025-02-06 13:02:13,386 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 33 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2025-02-06 13:02:13,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 164 flow [2025-02-06 13:02:13,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2025-02-06 13:02:13,388 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2025-02-06 13:02:13,388 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 90 flow. Second operand 3 states and 73 transitions. [2025-02-06 13:02:13,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 164 flow [2025-02-06 13:02:13,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:13,390 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 100 flow [2025-02-06 13:02:13,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2025-02-06 13:02:13,393 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2025-02-06 13:02:13,393 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 100 flow [2025-02-06 13:02:13,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:13,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:13,394 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:02:13,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:02:13,395 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:13,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash 768691715, now seen corresponding path program 1 times [2025-02-06 13:02:13,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:13,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342526870] [2025-02-06 13:02:13,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:13,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:13,408 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:13,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:13,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:13,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342526870] [2025-02-06 13:02:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342526870] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381650567] [2025-02-06 13:02:13,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:13,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:13,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:13,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:02:13,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:13,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:13,817 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:13,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:13,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:02:13,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:13,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:02:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:13,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:14,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381650567] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:14,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:14,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-02-06 13:02:14,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300003499] [2025-02-06 13:02:14,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:14,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:02:14,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:14,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:02:14,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:02:14,075 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:14,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 100 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:14,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:14,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:14,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:14,481 INFO L124 PetriNetUnfolderBase]: 1317/2110 cut-off events. [2025-02-06 13:02:14,481 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-02-06 13:02:14,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4053 conditions, 2110 events. 1317/2110 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10120 event pairs, 1060 based on Foata normal form. 1/1744 useless extension candidates. Maximal degree in co-relation 4040. Up to 1882 conditions per place. [2025-02-06 13:02:14,494 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 35 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2025-02-06 13:02:14,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 198 flow [2025-02-06 13:02:14,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-02-06 13:02:14,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.412 [2025-02-06 13:02:14,496 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 100 flow. Second operand 5 states and 103 transitions. [2025-02-06 13:02:14,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 198 flow [2025-02-06 13:02:14,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:14,497 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 135 flow [2025-02-06 13:02:14,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2025-02-06 13:02:14,498 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2025-02-06 13:02:14,498 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 135 flow [2025-02-06 13:02:14,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:14,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:14,499 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2025-02-06 13:02:14,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:02:14,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:14,703 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:14,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash 707131873, now seen corresponding path program 2 times [2025-02-06 13:02:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:14,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035340568] [2025-02-06 13:02:14,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:14,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:14,713 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-02-06 13:02:14,723 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:14,724 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:14,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:14,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:14,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035340568] [2025-02-06 13:02:14,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035340568] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:14,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289548811] [2025-02-06 13:02:14,829 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:14,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:14,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:14,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:14,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:02:14,895 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-02-06 13:02:14,911 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:14,912 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:14,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:14,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:02:14,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:15,003 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:15,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289548811] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:15,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:15,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-06 13:02:15,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305925403] [2025-02-06 13:02:15,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:15,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:15,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:15,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:15,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:02:15,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-02-06 13:02:15,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 135 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:15,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:15,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-02-06 13:02:15,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:15,256 INFO L124 PetriNetUnfolderBase]: 1316/2107 cut-off events. [2025-02-06 13:02:15,257 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2025-02-06 13:02:15,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 2107 events. 1316/2107 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10088 event pairs, 1060 based on Foata normal form. 1/1742 useless extension candidates. Maximal degree in co-relation 4028. Up to 1878 conditions per place. [2025-02-06 13:02:15,269 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 31 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2025-02-06 13:02:15,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 199 flow [2025-02-06 13:02:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:02:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:02:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2025-02-06 13:02:15,271 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2025-02-06 13:02:15,271 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 135 flow. Second operand 6 states and 116 transitions. [2025-02-06 13:02:15,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 199 flow [2025-02-06 13:02:15,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 188 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:15,273 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 126 flow [2025-02-06 13:02:15,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2025-02-06 13:02:15,273 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2025-02-06 13:02:15,273 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 126 flow [2025-02-06 13:02:15,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:15,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:15,274 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:15,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 13:02:15,474 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 [2025-02-06 13:02:15,475 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:15,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1026702347, now seen corresponding path program 1 times [2025-02-06 13:02:15,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:15,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92268381] [2025-02-06 13:02:15,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:15,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:15,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:02:15,499 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:15,499 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:15,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:15,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:15,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92268381] [2025-02-06 13:02:15,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92268381] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:15,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571119305] [2025-02-06 13:02:15,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:15,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:15,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:15,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:15,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:02:15,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:02:15,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:15,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:15,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:15,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:02:15,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:15,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:15,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571119305] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:15,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:15,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-02-06 13:02:15,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124621690] [2025-02-06 13:02:15,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:15,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:02:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:15,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:02:15,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:02:15,765 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-02-06 13:02:15,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:15,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:15,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-02-06 13:02:15,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:16,038 INFO L124 PetriNetUnfolderBase]: 1315/2106 cut-off events. [2025-02-06 13:02:16,039 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-02-06 13:02:16,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 2106 events. 1315/2106 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10075 event pairs, 1060 based on Foata normal form. 1/1741 useless extension candidates. Maximal degree in co-relation 4016. Up to 1878 conditions per place. [2025-02-06 13:02:16,052 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2025-02-06 13:02:16,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 43 transitions, 200 flow [2025-02-06 13:02:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2025-02-06 13:02:16,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.408 [2025-02-06 13:02:16,054 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 126 flow. Second operand 5 states and 102 transitions. [2025-02-06 13:02:16,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 43 transitions, 200 flow [2025-02-06 13:02:16,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 180 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-06 13:02:16,056 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 108 flow [2025-02-06 13:02:16,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2025-02-06 13:02:16,057 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2025-02-06 13:02:16,057 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 108 flow [2025-02-06 13:02:16,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:16,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:16,058 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:16,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:02:16,258 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 [2025-02-06 13:02:16,258 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:16,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:16,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1460164250, now seen corresponding path program 2 times [2025-02-06 13:02:16,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:16,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160551241] [2025-02-06 13:02:16,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:16,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:16,268 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:02:16,278 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 13 statements. [2025-02-06 13:02:16,281 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:02:16,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:16,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:16,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160551241] [2025-02-06 13:02:16,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160551241] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:16,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:16,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:16,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950378542] [2025-02-06 13:02:16,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:16,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:16,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:16,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:16,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:16,473 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:16,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:16,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:16,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:16,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:16,921 INFO L124 PetriNetUnfolderBase]: 2629/4081 cut-off events. [2025-02-06 13:02:16,921 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-02-06 13:02:16,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7939 conditions, 4081 events. 2629/4081 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 21542 event pairs, 1240 based on Foata normal form. 0/3383 useless extension candidates. Maximal degree in co-relation 7910. Up to 2168 conditions per place. [2025-02-06 13:02:16,942 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 57 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2025-02-06 13:02:16,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 287 flow [2025-02-06 13:02:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2025-02-06 13:02:16,943 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2025-02-06 13:02:16,943 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 108 flow. Second operand 5 states and 120 transitions. [2025-02-06 13:02:16,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 287 flow [2025-02-06 13:02:16,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:16,945 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 116 flow [2025-02-06 13:02:16,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2025-02-06 13:02:16,946 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2025-02-06 13:02:16,946 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 116 flow [2025-02-06 13:02:16,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:16,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:16,946 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:16,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:02:16,946 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:16,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1460164249, now seen corresponding path program 1 times [2025-02-06 13:02:16,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:16,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644010631] [2025-02-06 13:02:16,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:16,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:16,956 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:02:16,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:02:16,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:16,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:02:17,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644010631] [2025-02-06 13:02:17,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644010631] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:17,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:17,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:17,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727154267] [2025-02-06 13:02:17,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:17,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:17,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:17,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:17,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:17,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-06 13:02:17,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:17,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:17,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-06 13:02:17,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:17,451 INFO L124 PetriNetUnfolderBase]: 2423/3671 cut-off events. [2025-02-06 13:02:17,451 INFO L125 PetriNetUnfolderBase]: For 485/561 co-relation queries the response was YES. [2025-02-06 13:02:17,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7579 conditions, 3671 events. 2423/3671 cut-off events. For 485/561 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17419 event pairs, 2025 based on Foata normal form. 172/3359 useless extension candidates. Maximal degree in co-relation 7548. Up to 3458 conditions per place. [2025-02-06 13:02:17,471 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 33 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2025-02-06 13:02:17,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 180 flow [2025-02-06 13:02:17,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:17,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:17,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2025-02-06 13:02:17,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.355 [2025-02-06 13:02:17,473 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 116 flow. Second operand 4 states and 71 transitions. [2025-02-06 13:02:17,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 180 flow [2025-02-06 13:02:17,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:17,474 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 108 flow [2025-02-06 13:02:17,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2025-02-06 13:02:17,475 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2025-02-06 13:02:17,475 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 108 flow [2025-02-06 13:02:17,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:17,475 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:17,475 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:17,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:02:17,476 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:17,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2013917262, now seen corresponding path program 1 times [2025-02-06 13:02:17,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:17,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180996710] [2025-02-06 13:02:17,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:17,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:17,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:02:17,490 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:02:17,490 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:17,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:02:17,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:17,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180996710] [2025-02-06 13:02:17,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180996710] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:17,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143583243] [2025-02-06 13:02:17,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:17,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:17,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:17,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:02:17,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:02:17,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:02:17,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:17,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:17,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:02:17,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:17,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:18,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-06 13:02:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:18,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143583243] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:18,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:18,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2025-02-06 13:02:18,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579628523] [2025-02-06 13:02:18,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:18,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:02:18,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:18,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:02:18,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:02:18,406 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:18,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 108 flow. Second operand has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:18,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:18,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:18,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:19,605 INFO L124 PetriNetUnfolderBase]: 6825/9783 cut-off events. [2025-02-06 13:02:19,606 INFO L125 PetriNetUnfolderBase]: For 905/1130 co-relation queries the response was YES. [2025-02-06 13:02:19,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20450 conditions, 9783 events. 6825/9783 cut-off events. For 905/1130 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 49387 event pairs, 2385 based on Foata normal form. 0/8225 useless extension candidates. Maximal degree in co-relation 20419. Up to 4022 conditions per place. [2025-02-06 13:02:19,662 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 81 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2025-02-06 13:02:19,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 91 transitions, 412 flow [2025-02-06 13:02:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:02:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:02:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2025-02-06 13:02:19,665 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4575 [2025-02-06 13:02:19,665 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 108 flow. Second operand 8 states and 183 transitions. [2025-02-06 13:02:19,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 91 transitions, 412 flow [2025-02-06 13:02:19,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 409 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:19,669 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 133 flow [2025-02-06 13:02:19,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=133, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2025-02-06 13:02:19,672 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2025-02-06 13:02:19,673 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 133 flow [2025-02-06 13:02:19,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:19,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:19,673 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:19,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:19,874 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,SelfDestructingSolverStorable7 [2025-02-06 13:02:19,874 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:19,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash 325221158, now seen corresponding path program 1 times [2025-02-06 13:02:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:19,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769553669] [2025-02-06 13:02:19,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:19,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:19,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:19,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:19,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:20,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:20,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769553669] [2025-02-06 13:02:20,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769553669] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:20,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291474157] [2025-02-06 13:02:20,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:20,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:20,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:20,187 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:20,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:02:20,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:20,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:20,274 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:20,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:20,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 13:02:20,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:20,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:02:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:20,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:20,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291474157] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:20,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:20,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2025-02-06 13:02:20,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063825246] [2025-02-06 13:02:20,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:20,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 13:02:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:20,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 13:02:20,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2025-02-06 13:02:21,075 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2025-02-06 13:02:21,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 133 flow. Second operand has 21 states, 21 states have (on average 13.142857142857142) internal successors, (276), 21 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:21,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:21,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2025-02-06 13:02:21,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:23,106 INFO L124 PetriNetUnfolderBase]: 12853/18397 cut-off events. [2025-02-06 13:02:23,106 INFO L125 PetriNetUnfolderBase]: For 2855/2855 co-relation queries the response was YES. [2025-02-06 13:02:23,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40509 conditions, 18397 events. 12853/18397 cut-off events. For 2855/2855 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 101227 event pairs, 3460 based on Foata normal form. 0/15491 useless extension candidates. Maximal degree in co-relation 40473. Up to 5736 conditions per place. [2025-02-06 13:02:23,218 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2025-02-06 13:02:23,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 126 transitions, 608 flow [2025-02-06 13:02:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2025-02-06 13:02:23,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2025-02-06 13:02:23,220 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 133 flow. Second operand 9 states and 216 transitions. [2025-02-06 13:02:23,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 126 transitions, 608 flow [2025-02-06 13:02:23,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 126 transitions, 601 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:23,226 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 160 flow [2025-02-06 13:02:23,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2025-02-06 13:02:23,227 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2025-02-06 13:02:23,227 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 160 flow [2025-02-06 13:02:23,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.142857142857142) internal successors, (276), 21 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:23,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:23,227 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:23,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:02:23,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:23,429 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:23,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash 558768016, now seen corresponding path program 1 times [2025-02-06 13:02:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625002788] [2025-02-06 13:02:23,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:23,439 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:23,450 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:23,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:23,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625002788] [2025-02-06 13:02:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625002788] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746766033] [2025-02-06 13:02:23,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:23,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:23,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:23,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:23,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:02:23,797 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:23,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:23,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:23,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:23,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:02:23,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:23,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:24,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-06 13:02:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:24,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746766033] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:24,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:24,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2025-02-06 13:02:24,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564048932] [2025-02-06 13:02:24,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:24,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:02:24,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:24,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:02:24,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:02:24,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:24,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 160 flow. Second operand has 17 states, 17 states have (on average 14.764705882352942) internal successors, (251), 17 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:24,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:24,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:24,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:27,883 INFO L124 PetriNetUnfolderBase]: 32327/46067 cut-off events. [2025-02-06 13:02:27,883 INFO L125 PetriNetUnfolderBase]: For 19731/20147 co-relation queries the response was YES. [2025-02-06 13:02:28,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104651 conditions, 46067 events. 32327/46067 cut-off events. For 19731/20147 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 276522 event pairs, 12757 based on Foata normal form. 0/38291 useless extension candidates. Maximal degree in co-relation 104612. Up to 20102 conditions per place. [2025-02-06 13:02:28,201 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 89 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2025-02-06 13:02:28,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 99 transitions, 546 flow [2025-02-06 13:02:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:02:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:02:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2025-02-06 13:02:28,203 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4475 [2025-02-06 13:02:28,203 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 160 flow. Second operand 8 states and 179 transitions. [2025-02-06 13:02:28,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 99 transitions, 546 flow [2025-02-06 13:02:28,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 521 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:28,215 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 175 flow [2025-02-06 13:02:28,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2025-02-06 13:02:28,216 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 14 predicate places. [2025-02-06 13:02:28,217 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 175 flow [2025-02-06 13:02:28,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.764705882352942) internal successors, (251), 17 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:28,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:28,217 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:28,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:02:28,418 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,SelfDestructingSolverStorable9 [2025-02-06 13:02:28,418 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:28,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:28,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1121496466, now seen corresponding path program 1 times [2025-02-06 13:02:28,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:28,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267704495] [2025-02-06 13:02:28,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:28,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:28,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:02:28,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:02:28,439 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:28,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:28,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:28,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267704495] [2025-02-06 13:02:28,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267704495] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:28,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666454374] [2025-02-06 13:02:28,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:28,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:28,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:28,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:28,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:02:28,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:02:28,863 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:02:28,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:28,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:28,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:02:28,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:29,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:29,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-06 13:02:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:29,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666454374] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:29,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:29,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2025-02-06 13:02:29,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192527592] [2025-02-06 13:02:29,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:29,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:02:29,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:29,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:02:29,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:02:29,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:29,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 175 flow. Second operand has 24 states, 24 states have (on average 14.5) internal successors, (348), 24 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:29,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:29,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:29,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:34,476 INFO L124 PetriNetUnfolderBase]: 41923/59631 cut-off events. [2025-02-06 13:02:34,477 INFO L125 PetriNetUnfolderBase]: For 23790/24462 co-relation queries the response was YES. [2025-02-06 13:02:34,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139836 conditions, 59631 events. 41923/59631 cut-off events. For 23790/24462 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 371863 event pairs, 12007 based on Foata normal form. 778/51213 useless extension candidates. Maximal degree in co-relation 139794. Up to 18928 conditions per place. [2025-02-06 13:02:34,851 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 121 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2025-02-06 13:02:34,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 132 transitions, 715 flow [2025-02-06 13:02:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2025-02-06 13:02:34,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2025-02-06 13:02:34,852 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 175 flow. Second operand 9 states and 218 transitions. [2025-02-06 13:02:34,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 132 transitions, 715 flow [2025-02-06 13:02:34,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 132 transitions, 708 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:34,972 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 194 flow [2025-02-06 13:02:34,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=194, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2025-02-06 13:02:34,972 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2025-02-06 13:02:34,972 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 194 flow [2025-02-06 13:02:34,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.5) internal successors, (348), 24 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:34,973 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:34,973 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2025-02-06 13:02:34,980 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 [2025-02-06 13:02:35,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:35,178 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:35,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1333983578, now seen corresponding path program 2 times [2025-02-06 13:02:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:35,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781362620] [2025-02-06 13:02:35,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:35,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:35,205 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:02:35,239 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:02:35,240 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:35,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:35,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:35,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781362620] [2025-02-06 13:02:35,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781362620] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:35,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367297969] [2025-02-06 13:02:35,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:35,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:35,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:35,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:35,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:02:35,660 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:02:35,690 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:02:35,691 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:35,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:35,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:02:35,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:35,741 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:35,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367297969] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:35,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:35,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2025-02-06 13:02:35,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532045252] [2025-02-06 13:02:35,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:35,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:35,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:35,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:35,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:02:35,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-02-06 13:02:35,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 194 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:35,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:35,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-02-06 13:02:35,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:40,067 INFO L124 PetriNetUnfolderBase]: 37549/53687 cut-off events. [2025-02-06 13:02:40,067 INFO L125 PetriNetUnfolderBase]: For 29516/30192 co-relation queries the response was YES. [2025-02-06 13:02:40,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128219 conditions, 53687 events. 37549/53687 cut-off events. For 29516/30192 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 341322 event pairs, 975 based on Foata normal form. 0/45743 useless extension candidates. Maximal degree in co-relation 128175. Up to 13570 conditions per place. [2025-02-06 13:02:40,414 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 148 selfloop transitions, 4 changer transitions 0/155 dead transitions. [2025-02-06 13:02:40,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 155 transitions, 875 flow [2025-02-06 13:02:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:02:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:02:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2025-02-06 13:02:40,415 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.68 [2025-02-06 13:02:40,415 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 194 flow. Second operand 6 states and 204 transitions. [2025-02-06 13:02:40,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 155 transitions, 875 flow [2025-02-06 13:02:40,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 155 transitions, 818 flow, removed 5 selfloop flow, removed 11 redundant places. [2025-02-06 13:02:40,596 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 166 flow [2025-02-06 13:02:40,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2025-02-06 13:02:40,597 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2025-02-06 13:02:40,597 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 166 flow [2025-02-06 13:02:40,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:40,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:40,597 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:40,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 13:02:40,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:40,798 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:40,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:40,798 INFO L85 PathProgramCache]: Analyzing trace with hash -416314800, now seen corresponding path program 1 times [2025-02-06 13:02:40,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:40,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882875204] [2025-02-06 13:02:40,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:40,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:40,807 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:02:40,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:02:40,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:40,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:41,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:41,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882875204] [2025-02-06 13:02:41,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882875204] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:41,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809631840] [2025-02-06 13:02:41,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:41,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:41,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:41,091 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:41,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:02:41,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:02:41,183 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:02:41,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:41,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:41,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:02:41,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:41,384 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:41,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-06 13:02:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809631840] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:41,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:41,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2025-02-06 13:02:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514440072] [2025-02-06 13:02:41,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:41,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:02:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:41,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:02:41,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:02:41,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:41,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 166 flow. Second operand has 24 states, 24 states have (on average 14.75) internal successors, (354), 24 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:41,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:41,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:41,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:47,189 INFO L124 PetriNetUnfolderBase]: 51001/72889 cut-off events. [2025-02-06 13:02:47,189 INFO L125 PetriNetUnfolderBase]: For 36499/37335 co-relation queries the response was YES. [2025-02-06 13:02:47,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173644 conditions, 72889 events. 51001/72889 cut-off events. For 36499/37335 co-relation queries the response was YES. Maximal size of possible extension queue 1264. Compared 458906 event pairs, 16083 based on Foata normal form. 940/66037 useless extension candidates. Maximal degree in co-relation 173607. Up to 24864 conditions per place. [2025-02-06 13:02:47,572 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2025-02-06 13:02:47,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 694 flow [2025-02-06 13:02:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2025-02-06 13:02:47,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2025-02-06 13:02:47,573 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 166 flow. Second operand 9 states and 212 transitions. [2025-02-06 13:02:47,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 694 flow [2025-02-06 13:02:47,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 125 transitions, 666 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:47,755 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 185 flow [2025-02-06 13:02:47,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2025-02-06 13:02:47,755 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2025-02-06 13:02:47,755 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 185 flow [2025-02-06 13:02:47,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.75) internal successors, (354), 24 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:47,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:47,756 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:47,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 13:02:47,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:47,956 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:47,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:47,957 INFO L85 PathProgramCache]: Analyzing trace with hash -48544745, now seen corresponding path program 2 times [2025-02-06 13:02:47,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:47,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807186830] [2025-02-06 13:02:47,957 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:47,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:47,966 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:47,986 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:47,986 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:47,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:48,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:48,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807186830] [2025-02-06 13:02:48,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807186830] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:48,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101104676] [2025-02-06 13:02:48,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:48,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:48,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:48,467 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:48,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:02:48,535 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:48,560 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:48,560 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:48,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:48,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:02:48,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:48,600 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:48,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101104676] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:48,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:48,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2025-02-06 13:02:48,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344761994] [2025-02-06 13:02:48,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:48,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:48,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:48,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:48,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:02:48,607 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-02-06 13:02:48,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:48,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:48,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-02-06 13:02:48,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand