./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:41:10,157 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:41:10,253 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:41:10,259 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:41:10,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:41:10,285 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:41:10,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:41:10,287 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:41:10,287 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:41:10,287 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:41:10,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:41:10,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:41:10,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:41:10,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:41:10,288 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:41:10,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:41:10,289 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:41:10,289 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:41:10,289 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:41:10,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:41:10,289 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:41:10,289 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:41:10,290 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:41:10,290 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:41:10,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:41:10,291 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:41:10,291 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:41:10,291 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:41:10,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:41:10,291 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:41:10,291 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:41:10,291 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:41:10,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:41:10,292 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 -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2025-02-08 08:41:10,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:41:10,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:41:10,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:41:10,574 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:41:10,574 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:41:10,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2025-02-08 08:41:11,782 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/71cf8126f/66940c1cea914e5eaf2c01bc486f7f24/FLAGed8506898 [2025-02-08 08:41:12,038 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:41:12,038 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2025-02-08 08:41:12,044 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/71cf8126f/66940c1cea914e5eaf2c01bc486f7f24/FLAGed8506898 [2025-02-08 08:41:12,366 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/71cf8126f/66940c1cea914e5eaf2c01bc486f7f24 [2025-02-08 08:41:12,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:41:12,372 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:41:12,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:41:12,373 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:41:12,376 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:41:12,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef3eaba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12, skipping insertion in model container [2025-02-08 08:41:12,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,395 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:41:12,496 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:41:12,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:41:12,503 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:41:12,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:41:12,524 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:41:12,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12 WrapperNode [2025-02-08 08:41:12,525 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:41:12,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:41:12,526 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:41:12,526 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:41:12,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,545 INFO L138 Inliner]: procedures = 24, calls = 20, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 86 [2025-02-08 08:41:12,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:41:12,546 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:41:12,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:41:12,547 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:41:12,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,553 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,561 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]. [2025-02-08 08:41:12,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,562 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,566 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,566 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,567 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,568 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:41:12,570 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:41:12,570 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:41:12,570 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:41:12,571 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (1/1) ... [2025-02-08 08:41:12,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:41:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:12,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 08:41:12,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 08:41:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:41:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:41:12,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:41:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:41:12,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:41:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:41:12,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:41:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:41:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:41:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:41:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:41:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:41:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:41:12,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:41:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:41:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:41:12,613 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:41:12,714 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:41:12,720 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:41:12,911 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:41:12,912 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:41:13,001 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:41:13,002 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:41:13,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:41:13 BoogieIcfgContainer [2025-02-08 08:41:13,002 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:41:13,004 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:41:13,004 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:41:13,007 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:41:13,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:41:12" (1/3) ... [2025-02-08 08:41:13,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebccd64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:41:13, skipping insertion in model container [2025-02-08 08:41:13,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:12" (2/3) ... [2025-02-08 08:41:13,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebccd64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:41:13, skipping insertion in model container [2025-02-08 08:41:13,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:41:13" (3/3) ... [2025-02-08 08:41:13,009 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2025-02-08 08:41:13,018 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:41:13,019 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-sum-array-hom.wvr.c that has 4 procedures, 38 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2025-02-08 08:41:13,019 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:41:13,066 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:41:13,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 41 transitions, 103 flow [2025-02-08 08:41:13,105 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2025-02-08 08:41:13,107 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:41:13,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 4/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2025-02-08 08:41:13,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 41 transitions, 103 flow [2025-02-08 08:41:13,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 37 transitions, 92 flow [2025-02-08 08:41:13,116 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:41:13,123 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;@205f61a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:41:13,123 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2025-02-08 08:41:13,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:41:13,126 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:41:13,126 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:41:13,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:13,127 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:41:13,127 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:13,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash 331881, now seen corresponding path program 1 times [2025-02-08 08:41:13,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:13,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810634329] [2025-02-08 08:41:13,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:13,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:13,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:41:13,199 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:41:13,199 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:13,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:13,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:13,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810634329] [2025-02-08 08:41:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810634329] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:13,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:13,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:41:13,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095623570] [2025-02-08 08:41:13,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:13,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:41:13,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:13,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:41:13,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:41:13,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:13,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:13,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:13,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:13,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:13,481 INFO L124 PetriNetUnfolderBase]: 200/348 cut-off events. [2025-02-08 08:41:13,481 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-02-08 08:41:13,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 348 events. 200/348 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1189 event pairs, 124 based on Foata normal form. 1/318 useless extension candidates. Maximal degree in co-relation 585. Up to 293 conditions per place. [2025-02-08 08:41:13,484 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2025-02-08 08:41:13,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 132 flow [2025-02-08 08:41:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:41:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:41:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2025-02-08 08:41:13,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2025-02-08 08:41:13,497 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 92 flow. Second operand 3 states and 70 transitions. [2025-02-08 08:41:13,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 132 flow [2025-02-08 08:41:13,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:41:13,506 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 78 flow [2025-02-08 08:41:13,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2025-02-08 08:41:13,514 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2025-02-08 08:41:13,514 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 78 flow [2025-02-08 08:41:13,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:13,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:13,515 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:41:13,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:41:13,515 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:13,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:13,515 INFO L85 PathProgramCache]: Analyzing trace with hash 331882, now seen corresponding path program 1 times [2025-02-08 08:41:13,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:13,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296928748] [2025-02-08 08:41:13,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:13,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:13,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:41:13,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:41:13,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:13,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:13,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296928748] [2025-02-08 08:41:13,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296928748] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:13,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:13,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:13,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306127784] [2025-02-08 08:41:13,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:13,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:13,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:13,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:13,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:13,774 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:13,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:13,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:13,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:13,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:13,876 INFO L124 PetriNetUnfolderBase]: 201/351 cut-off events. [2025-02-08 08:41:13,877 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:41:13,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 351 events. 201/351 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1198 event pairs, 124 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 647. Up to 298 conditions per place. [2025-02-08 08:41:13,880 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 23 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2025-02-08 08:41:13,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 140 flow [2025-02-08 08:41:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2025-02-08 08:41:13,882 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2025-02-08 08:41:13,882 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 78 flow. Second operand 4 states and 88 transitions. [2025-02-08 08:41:13,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 140 flow [2025-02-08 08:41:13,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:13,884 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 101 flow [2025-02-08 08:41:13,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2025-02-08 08:41:13,885 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2025-02-08 08:41:13,885 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 101 flow [2025-02-08 08:41:13,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:13,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:13,885 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:41:13,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:41:13,886 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:13,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:13,886 INFO L85 PathProgramCache]: Analyzing trace with hash 318949510, now seen corresponding path program 1 times [2025-02-08 08:41:13,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:13,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247318228] [2025-02-08 08:41:13,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:13,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:13,891 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:41:13,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:41:13,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:13,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:14,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:14,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247318228] [2025-02-08 08:41:14,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247318228] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:14,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175047993] [2025-02-08 08:41:14,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:14,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:14,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:14,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 08:41:14,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:41:14,216 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:41:14,216 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:14,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:14,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-08 08:41:14,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:14,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-08 08:41:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:14,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:14,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175047993] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:14,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:14,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:41:14,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025987761] [2025-02-08 08:41:14,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:14,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:41:14,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:14,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:41:14,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:41:14,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:14,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 101 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:14,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:14,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:14,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:14,872 INFO L124 PetriNetUnfolderBase]: 202/353 cut-off events. [2025-02-08 08:41:14,873 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:41:14,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 353 events. 202/353 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1208 event pairs, 124 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 654. Up to 295 conditions per place. [2025-02-08 08:41:14,875 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 19 selfloop transitions, 10 changer transitions 0/39 dead transitions. [2025-02-08 08:41:14,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 167 flow [2025-02-08 08:41:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2025-02-08 08:41:14,877 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2025-02-08 08:41:14,877 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 101 flow. Second operand 8 states and 151 transitions. [2025-02-08 08:41:14,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 167 flow [2025-02-08 08:41:14,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:41:14,878 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 126 flow [2025-02-08 08:41:14,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2025-02-08 08:41:14,878 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2025-02-08 08:41:14,879 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 126 flow [2025-02-08 08:41:14,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:14,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:14,879 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:41:14,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 08:41:15,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:15,083 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:15,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:15,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1299509624, now seen corresponding path program 1 times [2025-02-08 08:41:15,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:15,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852268034] [2025-02-08 08:41:15,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:15,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:15,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:41:15,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:41:15,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:15,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:15,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:15,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852268034] [2025-02-08 08:41:15,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852268034] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:15,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:15,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:15,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141021097] [2025-02-08 08:41:15,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:15,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:15,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:15,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:15,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:15,150 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2025-02-08 08:41:15,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:15,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2025-02-08 08:41:15,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:15,213 INFO L124 PetriNetUnfolderBase]: 202/336 cut-off events. [2025-02-08 08:41:15,213 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:41:15,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 336 events. 202/336 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1042 event pairs, 124 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 638. Up to 294 conditions per place. [2025-02-08 08:41:15,216 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 25 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2025-02-08 08:41:15,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 178 flow [2025-02-08 08:41:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2025-02-08 08:41:15,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2025-02-08 08:41:15,217 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 126 flow. Second operand 4 states and 74 transitions. [2025-02-08 08:41:15,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 178 flow [2025-02-08 08:41:15,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 136 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-08 08:41:15,218 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 86 flow [2025-02-08 08:41:15,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2025-02-08 08:41:15,218 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2025-02-08 08:41:15,218 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 86 flow [2025-02-08 08:41:15,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:15,219 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:41:15,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:41:15,219 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:15,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:15,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1299509625, now seen corresponding path program 1 times [2025-02-08 08:41:15,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:15,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648661428] [2025-02-08 08:41:15,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:15,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:41:15,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:41:15,228 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:15,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:15,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648661428] [2025-02-08 08:41:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648661428] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:15,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:15,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:41:15,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400860130] [2025-02-08 08:41:15,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:15,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:41:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:15,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:41:15,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:41:15,303 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:15,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:15,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:15,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:15,478 INFO L124 PetriNetUnfolderBase]: 433/716 cut-off events. [2025-02-08 08:41:15,479 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-08 08:41:15,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 716 events. 433/716 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2742 event pairs, 248 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 813. Up to 384 conditions per place. [2025-02-08 08:41:15,482 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 54 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2025-02-08 08:41:15,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 270 flow [2025-02-08 08:41:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:41:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:41:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2025-02-08 08:41:15,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2025-02-08 08:41:15,486 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 86 flow. Second operand 5 states and 132 transitions. [2025-02-08 08:41:15,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 270 flow [2025-02-08 08:41:15,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:15,488 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 106 flow [2025-02-08 08:41:15,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2025-02-08 08:41:15,488 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2025-02-08 08:41:15,489 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 106 flow [2025-02-08 08:41:15,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:15,490 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:15,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:41:15,490 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:15,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1031924180, now seen corresponding path program 1 times [2025-02-08 08:41:15,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:15,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281905579] [2025-02-08 08:41:15,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:15,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:15,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:41:15,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:41:15,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:15,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:15,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:15,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281905579] [2025-02-08 08:41:15,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281905579] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:15,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:15,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:41:15,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720136698] [2025-02-08 08:41:15,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:15,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:41:15,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:15,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:41:15,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:41:15,580 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:15,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:15,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:15,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:15,713 INFO L124 PetriNetUnfolderBase]: 410/680 cut-off events. [2025-02-08 08:41:15,713 INFO L125 PetriNetUnfolderBase]: For 222/253 co-relation queries the response was YES. [2025-02-08 08:41:15,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 680 events. 410/680 cut-off events. For 222/253 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2581 event pairs, 248 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 900. Up to 389 conditions per place. [2025-02-08 08:41:15,718 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 51 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2025-02-08 08:41:15,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 282 flow [2025-02-08 08:41:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:41:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:41:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2025-02-08 08:41:15,719 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2025-02-08 08:41:15,719 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 106 flow. Second operand 5 states and 129 transitions. [2025-02-08 08:41:15,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 282 flow [2025-02-08 08:41:15,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:15,721 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 126 flow [2025-02-08 08:41:15,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2025-02-08 08:41:15,724 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2025-02-08 08:41:15,724 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 126 flow [2025-02-08 08:41:15,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,724 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:15,724 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:15,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:41:15,724 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:15,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1359541213, now seen corresponding path program 1 times [2025-02-08 08:41:15,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:15,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457437848] [2025-02-08 08:41:15,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:15,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:15,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:41:15,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:41:15,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:15,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:15,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457437848] [2025-02-08 08:41:15,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457437848] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363840971] [2025-02-08 08:41:15,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:15,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:15,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:15,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:15,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 08:41:15,956 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:41:15,966 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:41:15,966 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:15,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:41:15,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:16,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:16,081 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 [2025-02-08 08:41:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:16,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363840971] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:16,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:16,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-08 08:41:16,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695379407] [2025-02-08 08:41:16,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:16,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:41:16,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:16,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:41:16,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:41:16,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:16,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 126 flow. Second operand has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:16,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:16,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:16,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:16,452 INFO L124 PetriNetUnfolderBase]: 491/823 cut-off events. [2025-02-08 08:41:16,452 INFO L125 PetriNetUnfolderBase]: For 418/470 co-relation queries the response was YES. [2025-02-08 08:41:16,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 823 events. 491/823 cut-off events. For 418/470 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3417 event pairs, 293 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1278. Up to 404 conditions per place. [2025-02-08 08:41:16,457 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 52 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2025-02-08 08:41:16,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 312 flow [2025-02-08 08:41:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2025-02-08 08:41:16,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2025-02-08 08:41:16,459 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 126 flow. Second operand 6 states and 148 transitions. [2025-02-08 08:41:16,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 312 flow [2025-02-08 08:41:16,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:16,460 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 152 flow [2025-02-08 08:41:16,460 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2025-02-08 08:41:16,461 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2025-02-08 08:41:16,461 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 152 flow [2025-02-08 08:41:16,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:16,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:16,461 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:16,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 08:41:16,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:16,665 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:16,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:16,666 INFO L85 PathProgramCache]: Analyzing trace with hash 449502969, now seen corresponding path program 1 times [2025-02-08 08:41:16,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:16,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391878626] [2025-02-08 08:41:16,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:16,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:16,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:41:16,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:41:16,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:16,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:16,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:16,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391878626] [2025-02-08 08:41:16,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391878626] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:16,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:16,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:41:16,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497627985] [2025-02-08 08:41:16,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:16,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:41:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:16,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:41:16,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:41:16,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:16,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:16,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:16,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:16,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:16,927 INFO L124 PetriNetUnfolderBase]: 483/777 cut-off events. [2025-02-08 08:41:16,927 INFO L125 PetriNetUnfolderBase]: For 923/1094 co-relation queries the response was YES. [2025-02-08 08:41:16,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 777 events. 483/777 cut-off events. For 923/1094 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2991 event pairs, 306 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 1492. Up to 511 conditions per place. [2025-02-08 08:41:16,931 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 50 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-02-08 08:41:16,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 324 flow [2025-02-08 08:41:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:41:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:41:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2025-02-08 08:41:16,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2025-02-08 08:41:16,932 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 152 flow. Second operand 5 states and 126 transitions. [2025-02-08 08:41:16,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 324 flow [2025-02-08 08:41:16,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 309 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:16,936 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 164 flow [2025-02-08 08:41:16,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2025-02-08 08:41:16,936 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2025-02-08 08:41:16,936 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 164 flow [2025-02-08 08:41:16,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:16,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:16,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:16,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:41:16,937 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:16,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:16,937 INFO L85 PathProgramCache]: Analyzing trace with hash 823857040, now seen corresponding path program 1 times [2025-02-08 08:41:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:16,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349908879] [2025-02-08 08:41:16,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:16,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:16,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:41:16,950 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:41:16,950 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:16,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:17,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:17,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349908879] [2025-02-08 08:41:17,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349908879] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:17,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473497354] [2025-02-08 08:41:17,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:17,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:17,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:17,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:17,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 08:41:17,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:41:17,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:41:17,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:17,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:41:17,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:17,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:17,300 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 [2025-02-08 08:41:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:17,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473497354] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:17,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:17,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-08 08:41:17,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807838655] [2025-02-08 08:41:17,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:17,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:41:17,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:17,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:41:17,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:41:17,410 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:17,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 164 flow. Second operand has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:17,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:17,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:17,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:17,646 INFO L124 PetriNetUnfolderBase]: 625/1028 cut-off events. [2025-02-08 08:41:17,646 INFO L125 PetriNetUnfolderBase]: For 1053/1271 co-relation queries the response was YES. [2025-02-08 08:41:17,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 1028 events. 625/1028 cut-off events. For 1053/1271 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4484 event pairs, 358 based on Foata normal form. 0/985 useless extension candidates. Maximal degree in co-relation 2185. Up to 564 conditions per place. [2025-02-08 08:41:17,652 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 54 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2025-02-08 08:41:17,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 367 flow [2025-02-08 08:41:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2025-02-08 08:41:17,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2025-02-08 08:41:17,654 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 164 flow. Second operand 6 states and 146 transitions. [2025-02-08 08:41:17,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 367 flow [2025-02-08 08:41:17,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:17,657 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 190 flow [2025-02-08 08:41:17,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2025-02-08 08:41:17,657 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2025-02-08 08:41:17,657 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 190 flow [2025-02-08 08:41:17,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:17,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:17,659 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:17,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:41:17,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:17,859 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:17,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash 849059073, now seen corresponding path program 1 times [2025-02-08 08:41:17,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:17,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911062145] [2025-02-08 08:41:17,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:17,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:41:17,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:41:17,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:17,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:17,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:17,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911062145] [2025-02-08 08:41:17,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911062145] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:17,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064138699] [2025-02-08 08:41:17,931 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:17,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:17,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:17,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:17,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 08:41:17,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:41:17,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:41:17,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:17,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:17,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:18,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064138699] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:18,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:18,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-08 08:41:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466668800] [2025-02-08 08:41:18,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:18,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:41:18,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:18,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:41:18,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:41:18,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:18,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:18,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:18,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:18,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:18,399 INFO L124 PetriNetUnfolderBase]: 1167/1863 cut-off events. [2025-02-08 08:41:18,400 INFO L125 PetriNetUnfolderBase]: For 2164/2469 co-relation queries the response was YES. [2025-02-08 08:41:18,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5842 conditions, 1863 events. 1167/1863 cut-off events. For 2164/2469 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8825 event pairs, 547 based on Foata normal form. 34/1893 useless extension candidates. Maximal degree in co-relation 3771. Up to 806 conditions per place. [2025-02-08 08:41:18,410 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 80 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2025-02-08 08:41:18,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 99 transitions, 594 flow [2025-02-08 08:41:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2025-02-08 08:41:18,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2025-02-08 08:41:18,412 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 190 flow. Second operand 8 states and 194 transitions. [2025-02-08 08:41:18,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 99 transitions, 594 flow [2025-02-08 08:41:18,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 573 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:18,416 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 250 flow [2025-02-08 08:41:18,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2025-02-08 08:41:18,416 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2025-02-08 08:41:18,416 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 250 flow [2025-02-08 08:41:18,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:18,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:18,417 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:18,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:41:18,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-08 08:41:18,617 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:18,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:18,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1443827549, now seen corresponding path program 1 times [2025-02-08 08:41:18,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:18,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852750520] [2025-02-08 08:41:18,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:18,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:18,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:41:18,629 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:41:18,629 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:18,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:18,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852750520] [2025-02-08 08:41:18,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852750520] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828591664] [2025-02-08 08:41:18,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:18,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:18,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:18,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 08:41:18,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:41:18,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:41:18,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:18,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:18,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 08:41:18,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:18,917 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:41:18,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828591664] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:18,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:41:18,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2025-02-08 08:41:18,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381177154] [2025-02-08 08:41:18,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:18,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:18,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:18,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:18,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:41:18,996 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2025-02-08 08:41:18,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:18,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:18,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2025-02-08 08:41:18,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:19,210 INFO L124 PetriNetUnfolderBase]: 1113/1703 cut-off events. [2025-02-08 08:41:19,211 INFO L125 PetriNetUnfolderBase]: For 4121/4555 co-relation queries the response was YES. [2025-02-08 08:41:19,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6102 conditions, 1703 events. 1113/1703 cut-off events. For 4121/4555 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7657 event pairs, 409 based on Foata normal form. 0/1620 useless extension candidates. Maximal degree in co-relation 4222. Up to 896 conditions per place. [2025-02-08 08:41:19,218 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 72 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2025-02-08 08:41:19,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 87 transitions, 658 flow [2025-02-08 08:41:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:19,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2025-02-08 08:41:19,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2025-02-08 08:41:19,219 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 250 flow. Second operand 6 states and 127 transitions. [2025-02-08 08:41:19,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 87 transitions, 658 flow [2025-02-08 08:41:19,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 634 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:19,223 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 252 flow [2025-02-08 08:41:19,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2025-02-08 08:41:19,223 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2025-02-08 08:41:19,223 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 252 flow [2025-02-08 08:41:19,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:19,223 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:19,223 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:19,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:19,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-08 08:41:19,424 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:19,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:19,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1452644532, now seen corresponding path program 1 times [2025-02-08 08:41:19,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:19,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564559248] [2025-02-08 08:41:19,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:19,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:41:19,434 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:41:19,434 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:19,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:19,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:19,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564559248] [2025-02-08 08:41:19,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564559248] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:19,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435199135] [2025-02-08 08:41:19,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:19,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:19,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:19,493 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:19,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 08:41:19,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:41:19,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:41:19,538 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:19,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:19,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:41:19,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:19,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:19,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435199135] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:19,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:19,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-02-08 08:41:19,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620242263] [2025-02-08 08:41:19,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:19,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:41:19,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:19,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:41:19,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:41:19,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:19,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 252 flow. Second operand has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:19,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:19,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:19,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:19,978 INFO L124 PetriNetUnfolderBase]: 1136/1713 cut-off events. [2025-02-08 08:41:19,978 INFO L125 PetriNetUnfolderBase]: For 4378/4803 co-relation queries the response was YES. [2025-02-08 08:41:19,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6404 conditions, 1713 events. 1136/1713 cut-off events. For 4378/4803 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7221 event pairs, 544 based on Foata normal form. 35/1745 useless extension candidates. Maximal degree in co-relation 4533. Up to 816 conditions per place. [2025-02-08 08:41:19,988 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 75 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2025-02-08 08:41:19,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 653 flow [2025-02-08 08:41:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2025-02-08 08:41:19,990 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2025-02-08 08:41:19,990 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 252 flow. Second operand 8 states and 192 transitions. [2025-02-08 08:41:19,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 653 flow [2025-02-08 08:41:19,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 611 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:19,995 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 305 flow [2025-02-08 08:41:19,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2025-02-08 08:41:19,997 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2025-02-08 08:41:19,997 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 305 flow [2025-02-08 08:41:19,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:19,998 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:19,998 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:20,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:20,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-08 08:41:20,199 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:20,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:20,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1843383653, now seen corresponding path program 2 times [2025-02-08 08:41:20,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:20,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896610238] [2025-02-08 08:41:20,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:20,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:20,206 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-08 08:41:20,214 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:41:20,214 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:20,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:20,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:20,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896610238] [2025-02-08 08:41:20,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896610238] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:20,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578157382] [2025-02-08 08:41:20,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:20,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:20,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:20,375 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:20,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 08:41:20,413 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-08 08:41:20,425 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:41:20,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:20,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:20,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 08:41:20,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:20,435 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 [2025-02-08 08:41:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:20,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578157382] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:20,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:20,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-08 08:41:20,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130977341] [2025-02-08 08:41:20,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:20,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 08:41:20,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:20,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 08:41:20,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:41:21,072 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2025-02-08 08:41:21,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 305 flow. Second operand has 20 states, 20 states have (on average 14.75) internal successors, (295), 20 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:21,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:21,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2025-02-08 08:41:21,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:21,870 INFO L124 PetriNetUnfolderBase]: 1330/1990 cut-off events. [2025-02-08 08:41:21,870 INFO L125 PetriNetUnfolderBase]: For 4621/4982 co-relation queries the response was YES. [2025-02-08 08:41:21,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7693 conditions, 1990 events. 1330/1990 cut-off events. For 4621/4982 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8667 event pairs, 296 based on Foata normal form. 0/1986 useless extension candidates. Maximal degree in co-relation 5218. Up to 416 conditions per place. [2025-02-08 08:41:21,882 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 137 selfloop transitions, 21 changer transitions 0/162 dead transitions. [2025-02-08 08:41:21,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 162 transitions, 1124 flow [2025-02-08 08:41:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-08 08:41:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-08 08:41:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 318 transitions. [2025-02-08 08:41:21,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2025-02-08 08:41:21,883 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 305 flow. Second operand 14 states and 318 transitions. [2025-02-08 08:41:21,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 162 transitions, 1124 flow [2025-02-08 08:41:21,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 162 transitions, 1096 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:21,890 INFO L231 Difference]: Finished difference. Result has 76 places, 56 transitions, 364 flow [2025-02-08 08:41:21,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=364, PETRI_PLACES=76, PETRI_TRANSITIONS=56} [2025-02-08 08:41:21,890 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2025-02-08 08:41:21,890 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 56 transitions, 364 flow [2025-02-08 08:41:21,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.75) internal successors, (295), 20 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:21,891 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:21,891 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:21,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:22,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:22,092 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:22,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:22,092 INFO L85 PathProgramCache]: Analyzing trace with hash -779141096, now seen corresponding path program 2 times [2025-02-08 08:41:22,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:22,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763316183] [2025-02-08 08:41:22,093 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:22,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:22,096 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-08 08:41:22,100 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:41:22,101 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:22,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:22,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:22,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763316183] [2025-02-08 08:41:22,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763316183] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:22,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817797260] [2025-02-08 08:41:22,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:22,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:22,217 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:22,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 08:41:22,255 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-08 08:41:22,267 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:41:22,267 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:22,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:22,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:41:22,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:22,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:22,454 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 [2025-02-08 08:41:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817797260] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:22,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:22,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-08 08:41:22,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480648766] [2025-02-08 08:41:22,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:22,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 08:41:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:22,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 08:41:22,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:41:22,852 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2025-02-08 08:41:22,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 56 transitions, 364 flow. Second operand has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:22,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:22,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2025-02-08 08:41:22,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:23,519 INFO L124 PetriNetUnfolderBase]: 1587/2284 cut-off events. [2025-02-08 08:41:23,520 INFO L125 PetriNetUnfolderBase]: For 9197/9728 co-relation queries the response was YES. [2025-02-08 08:41:23,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9520 conditions, 2284 events. 1587/2284 cut-off events. For 9197/9728 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9457 event pairs, 312 based on Foata normal form. 0/2278 useless extension candidates. Maximal degree in co-relation 6545. Up to 481 conditions per place. [2025-02-08 08:41:23,540 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 140 selfloop transitions, 21 changer transitions 0/166 dead transitions. [2025-02-08 08:41:23,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 166 transitions, 1315 flow [2025-02-08 08:41:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-08 08:41:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-08 08:41:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 325 transitions. [2025-02-08 08:41:23,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5662020905923345 [2025-02-08 08:41:23,545 INFO L175 Difference]: Start difference. First operand has 76 places, 56 transitions, 364 flow. Second operand 14 states and 325 transitions. [2025-02-08 08:41:23,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 166 transitions, 1315 flow [2025-02-08 08:41:23,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 166 transitions, 1107 flow, removed 48 selfloop flow, removed 10 redundant places. [2025-02-08 08:41:23,560 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 374 flow [2025-02-08 08:41:23,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=374, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2025-02-08 08:41:23,561 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2025-02-08 08:41:23,561 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 374 flow [2025-02-08 08:41:23,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:23,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:23,561 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:23,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 08:41:23,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:23,762 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:23,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash 632334207, now seen corresponding path program 1 times [2025-02-08 08:41:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:23,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882406809] [2025-02-08 08:41:23,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:23,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:23,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:41:23,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:41:23,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:23,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:23,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:23,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882406809] [2025-02-08 08:41:23,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882406809] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:23,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:23,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:23,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807288057] [2025-02-08 08:41:23,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:23,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:41:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:23,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:41:23,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:41:23,845 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2025-02-08 08:41:23,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:23,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:23,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2025-02-08 08:41:23,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:24,004 INFO L124 PetriNetUnfolderBase]: 1434/2297 cut-off events. [2025-02-08 08:41:24,004 INFO L125 PetriNetUnfolderBase]: For 7871/8205 co-relation queries the response was YES. [2025-02-08 08:41:24,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9378 conditions, 2297 events. 1434/2297 cut-off events. For 7871/8205 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11075 event pairs, 388 based on Foata normal form. 3/2281 useless extension candidates. Maximal degree in co-relation 7067. Up to 1405 conditions per place. [2025-02-08 08:41:24,014 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 60 selfloop transitions, 6 changer transitions 8/82 dead transitions. [2025-02-08 08:41:24,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 662 flow [2025-02-08 08:41:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:41:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:41:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2025-02-08 08:41:24,016 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2025-02-08 08:41:24,016 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 374 flow. Second operand 3 states and 89 transitions. [2025-02-08 08:41:24,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 662 flow [2025-02-08 08:41:24,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 574 flow, removed 15 selfloop flow, removed 10 redundant places. [2025-02-08 08:41:24,022 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 314 flow [2025-02-08 08:41:24,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2025-02-08 08:41:24,023 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2025-02-08 08:41:24,023 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 314 flow [2025-02-08 08:41:24,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:24,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:24,023 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:24,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-08 08:41:24,024 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:24,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1336462417, now seen corresponding path program 1 times [2025-02-08 08:41:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:24,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735967485] [2025-02-08 08:41:24,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:24,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:41:24,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:24,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:24,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:24,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735967485] [2025-02-08 08:41:24,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735967485] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598460159] [2025-02-08 08:41:24,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:24,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:24,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:24,098 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:24,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 08:41:24,137 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:41:24,153 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:24,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:24,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:24,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:24,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:24,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:24,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598460159] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:24,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:24,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2025-02-08 08:41:24,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679607990] [2025-02-08 08:41:24,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:24,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:24,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:24,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:24,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:41:24,262 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2025-02-08 08:41:24,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:24,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:24,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2025-02-08 08:41:24,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:24,524 INFO L124 PetriNetUnfolderBase]: 2520/3587 cut-off events. [2025-02-08 08:41:24,524 INFO L125 PetriNetUnfolderBase]: For 8733/9202 co-relation queries the response was YES. [2025-02-08 08:41:24,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13498 conditions, 3587 events. 2520/3587 cut-off events. For 8733/9202 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16890 event pairs, 615 based on Foata normal form. 0/3312 useless extension candidates. Maximal degree in co-relation 9609. Up to 1509 conditions per place. [2025-02-08 08:41:24,539 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 138 selfloop transitions, 28 changer transitions 0/170 dead transitions. [2025-02-08 08:41:24,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 170 transitions, 1349 flow [2025-02-08 08:41:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:41:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:41:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2025-02-08 08:41:24,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2025-02-08 08:41:24,541 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 314 flow. Second operand 9 states and 206 transitions. [2025-02-08 08:41:24,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 170 transitions, 1349 flow [2025-02-08 08:41:24,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 170 transitions, 1113 flow, removed 42 selfloop flow, removed 9 redundant places. [2025-02-08 08:41:24,559 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 388 flow [2025-02-08 08:41:24,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=388, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2025-02-08 08:41:24,559 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2025-02-08 08:41:24,559 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 388 flow [2025-02-08 08:41:24,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:24,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:24,559 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:24,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:24,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:24,760 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:24,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash 15424241, now seen corresponding path program 2 times [2025-02-08 08:41:24,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:24,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022832071] [2025-02-08 08:41:24,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:24,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:24,765 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 08:41:24,768 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:24,768 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:24,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:24,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:24,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022832071] [2025-02-08 08:41:24,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022832071] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:24,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306427327] [2025-02-08 08:41:24,806 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:24,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:24,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:24,810 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) [2025-02-08 08:41:24,813 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 [2025-02-08 08:41:24,846 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 08:41:24,861 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:24,861 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:24,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:24,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:24,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:24,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:24,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306427327] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:24,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:24,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2025-02-08 08:41:24,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952512544] [2025-02-08 08:41:24,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:24,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:24,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:24,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:24,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:41:24,987 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2025-02-08 08:41:24,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 388 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:24,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:24,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2025-02-08 08:41:24,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:25,269 INFO L124 PetriNetUnfolderBase]: 3199/4554 cut-off events. [2025-02-08 08:41:25,269 INFO L125 PetriNetUnfolderBase]: For 7640/7896 co-relation queries the response was YES. [2025-02-08 08:41:25,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15467 conditions, 4554 events. 3199/4554 cut-off events. For 7640/7896 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 22040 event pairs, 671 based on Foata normal form. 26/4497 useless extension candidates. Maximal degree in co-relation 10365. Up to 1624 conditions per place. [2025-02-08 08:41:25,286 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 54 changer transitions 0/201 dead transitions. [2025-02-08 08:41:25,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 201 transitions, 1457 flow [2025-02-08 08:41:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:41:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:41:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2025-02-08 08:41:25,292 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2025-02-08 08:41:25,292 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 388 flow. Second operand 9 states and 201 transitions. [2025-02-08 08:41:25,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 201 transitions, 1457 flow [2025-02-08 08:41:25,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 201 transitions, 1454 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:25,309 INFO L231 Difference]: Finished difference. Result has 80 places, 106 transitions, 826 flow [2025-02-08 08:41:25,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=826, PETRI_PLACES=80, PETRI_TRANSITIONS=106} [2025-02-08 08:41:25,309 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2025-02-08 08:41:25,309 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 106 transitions, 826 flow [2025-02-08 08:41:25,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:25,310 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:25,310 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:25,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-08 08:41:25,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-08 08:41:25,511 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:25,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1369714225, now seen corresponding path program 3 times [2025-02-08 08:41:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:25,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64522573] [2025-02-08 08:41:25,511 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:25,523 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-02-08 08:41:25,526 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 23 statements. [2025-02-08 08:41:25,526 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:25,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:25,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:25,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64522573] [2025-02-08 08:41:25,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64522573] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:25,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437941318] [2025-02-08 08:41:25,635 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:25,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:25,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:25,638 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:25,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 08:41:25,679 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-02-08 08:41:25,694 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 23 statements. [2025-02-08 08:41:25,694 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:25,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:25,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 08:41:25,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:25,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437941318] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:25,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:25,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-02-08 08:41:25,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672050447] [2025-02-08 08:41:25,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:25,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:41:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:25,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:41:25,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:41:25,812 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2025-02-08 08:41:25,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 106 transitions, 826 flow. Second operand has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:25,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:25,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2025-02-08 08:41:25,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:26,932 INFO L124 PetriNetUnfolderBase]: 7390/10506 cut-off events. [2025-02-08 08:41:26,933 INFO L125 PetriNetUnfolderBase]: For 35817/35817 co-relation queries the response was YES. [2025-02-08 08:41:26,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46677 conditions, 10506 events. 7390/10506 cut-off events. For 35817/35817 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 55090 event pairs, 787 based on Foata normal form. 22/10192 useless extension candidates. Maximal degree in co-relation 36924. Up to 2594 conditions per place. [2025-02-08 08:41:26,978 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 360 selfloop transitions, 438 changer transitions 0/799 dead transitions. [2025-02-08 08:41:26,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 799 transitions, 8138 flow [2025-02-08 08:41:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-08 08:41:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-02-08 08:41:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 673 transitions. [2025-02-08 08:41:26,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5295043273013376 [2025-02-08 08:41:26,982 INFO L175 Difference]: Start difference. First operand has 80 places, 106 transitions, 826 flow. Second operand 31 states and 673 transitions. [2025-02-08 08:41:26,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 799 transitions, 8138 flow [2025-02-08 08:41:27,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 799 transitions, 8063 flow, removed 36 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:27,194 INFO L231 Difference]: Finished difference. Result has 134 places, 562 transitions, 7094 flow [2025-02-08 08:41:27,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7094, PETRI_PLACES=134, PETRI_TRANSITIONS=562} [2025-02-08 08:41:27,195 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2025-02-08 08:41:27,195 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 562 transitions, 7094 flow [2025-02-08 08:41:27,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:27,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:27,195 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:27,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:27,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 08:41:27,401 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:27,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:27,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1479428599, now seen corresponding path program 4 times [2025-02-08 08:41:27,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:27,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542614383] [2025-02-08 08:41:27,401 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:27,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:27,406 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-02-08 08:41:27,408 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-02-08 08:41:27,408 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 08:41:27,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:27,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:27,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542614383] [2025-02-08 08:41:27,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542614383] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:27,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:27,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:41:27,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824478232] [2025-02-08 08:41:27,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:27,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:27,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:27,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:27,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-08 08:41:27,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2025-02-08 08:41:27,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 562 transitions, 7094 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:27,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:27,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2025-02-08 08:41:27,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:28,853 INFO L124 PetriNetUnfolderBase]: 8102/11514 cut-off events. [2025-02-08 08:41:28,853 INFO L125 PetriNetUnfolderBase]: For 86447/86447 co-relation queries the response was YES. [2025-02-08 08:41:28,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67029 conditions, 11514 events. 8102/11514 cut-off events. For 86447/86447 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60632 event pairs, 2082 based on Foata normal form. 4/11516 useless extension candidates. Maximal degree in co-relation 65354. Up to 6772 conditions per place. [2025-02-08 08:41:28,922 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 528 selfloop transitions, 283 changer transitions 7/819 dead transitions. [2025-02-08 08:41:28,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 819 transitions, 11481 flow [2025-02-08 08:41:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:41:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:41:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2025-02-08 08:41:28,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2025-02-08 08:41:28,923 INFO L175 Difference]: Start difference. First operand has 134 places, 562 transitions, 7094 flow. Second operand 7 states and 166 transitions. [2025-02-08 08:41:28,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 819 transitions, 11481 flow [2025-02-08 08:41:29,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 819 transitions, 11231 flow, removed 125 selfloop flow, removed 0 redundant places. [2025-02-08 08:41:29,617 INFO L231 Difference]: Finished difference. Result has 145 places, 634 transitions, 8886 flow [2025-02-08 08:41:29,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6908, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8886, PETRI_PLACES=145, PETRI_TRANSITIONS=634} [2025-02-08 08:41:29,618 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2025-02-08 08:41:29,618 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 634 transitions, 8886 flow [2025-02-08 08:41:29,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:29,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:29,619 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:29,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-08 08:41:29,619 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:29,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:29,619 INFO L85 PathProgramCache]: Analyzing trace with hash -82436599, now seen corresponding path program 5 times [2025-02-08 08:41:29,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:29,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797362476] [2025-02-08 08:41:29,619 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:29,628 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-02-08 08:41:29,636 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:29,636 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:41:29,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:29,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:29,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797362476] [2025-02-08 08:41:29,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797362476] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:29,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319912510] [2025-02-08 08:41:29,702 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:29,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:29,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:29,705 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:29,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-08 08:41:29,749 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-02-08 08:41:29,764 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:29,764 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:41:29,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:29,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:29,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:29,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:29,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319912510] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:29,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:29,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-02-08 08:41:29,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747413649] [2025-02-08 08:41:29,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:29,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:29,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:29,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:29,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:41:29,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2025-02-08 08:41:29,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 634 transitions, 8886 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:29,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:29,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2025-02-08 08:41:29,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:31,241 INFO L124 PetriNetUnfolderBase]: 7222/10361 cut-off events. [2025-02-08 08:41:31,241 INFO L125 PetriNetUnfolderBase]: For 84600/85178 co-relation queries the response was YES. [2025-02-08 08:41:31,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62615 conditions, 10361 events. 7222/10361 cut-off events. For 84600/85178 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 56912 event pairs, 981 based on Foata normal form. 35/10351 useless extension candidates. Maximal degree in co-relation 60974. Up to 3462 conditions per place. [2025-02-08 08:41:31,335 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 435 selfloop transitions, 350 changer transitions 0/796 dead transitions. [2025-02-08 08:41:31,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 796 transitions, 12178 flow [2025-02-08 08:41:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2025-02-08 08:41:31,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2025-02-08 08:41:31,339 INFO L175 Difference]: Start difference. First operand has 145 places, 634 transitions, 8886 flow. Second operand 8 states and 187 transitions. [2025-02-08 08:41:31,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 796 transitions, 12178 flow [2025-02-08 08:41:31,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 796 transitions, 11850 flow, removed 34 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:31,984 INFO L231 Difference]: Finished difference. Result has 152 places, 690 transitions, 10673 flow [2025-02-08 08:41:31,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8608, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10673, PETRI_PLACES=152, PETRI_TRANSITIONS=690} [2025-02-08 08:41:31,985 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2025-02-08 08:41:31,985 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 690 transitions, 10673 flow [2025-02-08 08:41:31,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:31,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:31,986 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:31,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-08 08:41:32,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:32,187 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:32,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:32,187 INFO L85 PathProgramCache]: Analyzing trace with hash -494348573, now seen corresponding path program 6 times [2025-02-08 08:41:32,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:32,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832597719] [2025-02-08 08:41:32,188 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:41:32,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:32,192 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-02-08 08:41:32,196 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:32,196 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:41:32,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:32,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:32,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832597719] [2025-02-08 08:41:32,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832597719] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:32,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286191650] [2025-02-08 08:41:32,239 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:41:32,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:32,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:32,241 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:32,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 08:41:32,310 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-02-08 08:41:32,328 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:32,329 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:41:32,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:32,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:32,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:32,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:32,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286191650] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:32,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:32,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-02-08 08:41:32,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746566637] [2025-02-08 08:41:32,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:32,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:32,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:32,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:32,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:41:32,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2025-02-08 08:41:32,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 690 transitions, 10673 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:32,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:32,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2025-02-08 08:41:32,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:34,092 INFO L124 PetriNetUnfolderBase]: 7577/10884 cut-off events. [2025-02-08 08:41:34,092 INFO L125 PetriNetUnfolderBase]: For 105413/105831 co-relation queries the response was YES. [2025-02-08 08:41:34,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69662 conditions, 10884 events. 7577/10884 cut-off events. For 105413/105831 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 60075 event pairs, 1061 based on Foata normal form. 52/10885 useless extension candidates. Maximal degree in co-relation 68240. Up to 4176 conditions per place. [2025-02-08 08:41:34,174 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 384 selfloop transitions, 511 changer transitions 1/907 dead transitions. [2025-02-08 08:41:34,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 907 transitions, 14687 flow [2025-02-08 08:41:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:41:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:41:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2025-02-08 08:41:34,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2025-02-08 08:41:34,176 INFO L175 Difference]: Start difference. First operand has 152 places, 690 transitions, 10673 flow. Second operand 9 states and 215 transitions. [2025-02-08 08:41:34,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 907 transitions, 14687 flow [2025-02-08 08:41:35,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 907 transitions, 14167 flow, removed 85 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:35,193 INFO L231 Difference]: Finished difference. Result has 159 places, 753 transitions, 12809 flow [2025-02-08 08:41:35,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10176, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12809, PETRI_PLACES=159, PETRI_TRANSITIONS=753} [2025-02-08 08:41:35,194 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2025-02-08 08:41:35,194 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 753 transitions, 12809 flow [2025-02-08 08:41:35,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:35,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:35,195 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:35,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-08 08:41:35,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:35,395 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:35,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1314178827, now seen corresponding path program 7 times [2025-02-08 08:41:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:35,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367659588] [2025-02-08 08:41:35,396 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:41:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:35,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:41:35,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:35,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:35,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:35,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:35,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367659588] [2025-02-08 08:41:35,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367659588] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:35,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151140927] [2025-02-08 08:41:35,510 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:41:35,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:35,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:35,514 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:35,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-08 08:41:35,566 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:41:35,580 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:35,580 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:35,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:35,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:35,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:35,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:35,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151140927] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:35,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:35,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2025-02-08 08:41:35,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645114975] [2025-02-08 08:41:35,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:35,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:35,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:35,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:35,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:41:35,716 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2025-02-08 08:41:35,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 753 transitions, 12809 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:35,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:35,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2025-02-08 08:41:35,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:37,148 INFO L124 PetriNetUnfolderBase]: 7621/10858 cut-off events. [2025-02-08 08:41:37,148 INFO L125 PetriNetUnfolderBase]: For 117340/117819 co-relation queries the response was YES. [2025-02-08 08:41:37,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71634 conditions, 10858 events. 7621/10858 cut-off events. For 117340/117819 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 59145 event pairs, 799 based on Foata normal form. 49/10866 useless extension candidates. Maximal degree in co-relation 70712. Up to 2961 conditions per place. [2025-02-08 08:41:37,221 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 548 changer transitions 0/880 dead transitions. [2025-02-08 08:41:37,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 880 transitions, 15520 flow [2025-02-08 08:41:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2025-02-08 08:41:37,222 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2025-02-08 08:41:37,222 INFO L175 Difference]: Start difference. First operand has 159 places, 753 transitions, 12809 flow. Second operand 8 states and 184 transitions. [2025-02-08 08:41:37,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 880 transitions, 15520 flow [2025-02-08 08:41:38,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 880 transitions, 15349 flow, removed 84 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:38,335 INFO L231 Difference]: Finished difference. Result has 167 places, 760 transitions, 14641 flow [2025-02-08 08:41:38,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12638, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14641, PETRI_PLACES=167, PETRI_TRANSITIONS=760} [2025-02-08 08:41:38,336 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2025-02-08 08:41:38,336 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 760 transitions, 14641 flow [2025-02-08 08:41:38,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:38,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:38,336 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:38,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-08 08:41:38,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-02-08 08:41:38,537 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:38,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:38,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1251332115, now seen corresponding path program 8 times [2025-02-08 08:41:38,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:38,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022188610] [2025-02-08 08:41:38,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:38,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:38,541 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 08:41:38,544 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:38,544 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:38,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:38,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:38,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022188610] [2025-02-08 08:41:38,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022188610] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:38,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183982463] [2025-02-08 08:41:38,614 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:38,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:38,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:38,616 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:38,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-08 08:41:38,657 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 08:41:38,673 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:38,673 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:38,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:38,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:38,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:38,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:38,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183982463] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:38,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:38,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-02-08 08:41:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487983037] [2025-02-08 08:41:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:38,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:38,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:38,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:41:38,821 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2025-02-08 08:41:38,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 760 transitions, 14641 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:38,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:38,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2025-02-08 08:41:38,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:40,604 INFO L124 PetriNetUnfolderBase]: 7484/10716 cut-off events. [2025-02-08 08:41:40,604 INFO L125 PetriNetUnfolderBase]: For 145194/145594 co-relation queries the response was YES. [2025-02-08 08:41:40,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76793 conditions, 10716 events. 7484/10716 cut-off events. For 145194/145594 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 58501 event pairs, 1081 based on Foata normal form. 36/10700 useless extension candidates. Maximal degree in co-relation 76330. Up to 3917 conditions per place. [2025-02-08 08:41:40,715 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 567 changer transitions 0/851 dead transitions. [2025-02-08 08:41:40,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 851 transitions, 16974 flow [2025-02-08 08:41:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:41:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:41:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2025-02-08 08:41:40,716 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2025-02-08 08:41:40,716 INFO L175 Difference]: Start difference. First operand has 167 places, 760 transitions, 14641 flow. Second operand 9 states and 210 transitions. [2025-02-08 08:41:40,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 851 transitions, 16974 flow [2025-02-08 08:41:42,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 851 transitions, 16936 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:42,383 INFO L231 Difference]: Finished difference. Result has 169 places, 763 transitions, 15765 flow [2025-02-08 08:41:42,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14596, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=563, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15765, PETRI_PLACES=169, PETRI_TRANSITIONS=763} [2025-02-08 08:41:42,384 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2025-02-08 08:41:42,384 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 763 transitions, 15765 flow [2025-02-08 08:41:42,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:42,384 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:42,384 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:42,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-08 08:41:42,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:42,586 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:42,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:42,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2085309743, now seen corresponding path program 1 times [2025-02-08 08:41:42,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:42,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598036298] [2025-02-08 08:41:42,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:42,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:42,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:41:42,593 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:42,593 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:42,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:42,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598036298] [2025-02-08 08:41:42,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598036298] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645625846] [2025-02-08 08:41:42,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:42,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:42,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:42,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:42,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-08 08:41:42,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:41:42,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:41:42,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:42,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:42,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 08:41:42,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:42,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:42,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645625846] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:42,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:42,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-08 08:41:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534995886] [2025-02-08 08:41:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:42,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:41:42,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:42,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:41:42,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:42,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:42,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 763 transitions, 15765 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:42,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:42,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:42,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:43,974 INFO L124 PetriNetUnfolderBase]: 6210/8975 cut-off events. [2025-02-08 08:41:43,974 INFO L125 PetriNetUnfolderBase]: For 176755/177812 co-relation queries the response was YES. [2025-02-08 08:41:44,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72129 conditions, 8975 events. 6210/8975 cut-off events. For 176755/177812 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 49838 event pairs, 933 based on Foata normal form. 954/9705 useless extension candidates. Maximal degree in co-relation 70616. Up to 4479 conditions per place. [2025-02-08 08:41:44,033 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 643 selfloop transitions, 18 changer transitions 0/888 dead transitions. [2025-02-08 08:41:44,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 888 transitions, 19921 flow [2025-02-08 08:41:44,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:41:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:41:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2025-02-08 08:41:44,035 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2025-02-08 08:41:44,035 INFO L175 Difference]: Start difference. First operand has 169 places, 763 transitions, 15765 flow. Second operand 5 states and 113 transitions. [2025-02-08 08:41:44,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 888 transitions, 19921 flow [2025-02-08 08:41:44,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 888 transitions, 19327 flow, removed 11 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:44,895 INFO L231 Difference]: Finished difference. Result has 169 places, 755 transitions, 15240 flow [2025-02-08 08:41:44,895 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15204, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=15240, PETRI_PLACES=169, PETRI_TRANSITIONS=755} [2025-02-08 08:41:44,896 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2025-02-08 08:41:44,896 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 755 transitions, 15240 flow [2025-02-08 08:41:44,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:44,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:44,896 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:44,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:45,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:45,100 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:45,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 910614745, now seen corresponding path program 1 times [2025-02-08 08:41:45,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:45,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860479042] [2025-02-08 08:41:45,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:45,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:45,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:41:45,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:41:45,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:45,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:45,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860479042] [2025-02-08 08:41:45,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860479042] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198389864] [2025-02-08 08:41:45,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:45,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:45,478 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:45,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-08 08:41:45,515 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:41:45,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:41:45,559 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:45,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:45,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-08 08:41:45,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:45,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-02-08 08:41:45,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-02-08 08:41:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:45,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:45,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198389864] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:45,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:45,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 26 [2025-02-08 08:41:45,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488882094] [2025-02-08 08:41:45,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:45,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-08 08:41:45,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:45,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-08 08:41:45,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-02-08 08:41:46,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:41:46,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 755 transitions, 15240 flow. Second operand has 27 states, 27 states have (on average 17.444444444444443) internal successors, (471), 27 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:46,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:46,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:41:46,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:48,286 INFO L124 PetriNetUnfolderBase]: 7257/10756 cut-off events. [2025-02-08 08:41:48,286 INFO L125 PetriNetUnfolderBase]: For 185266/186018 co-relation queries the response was YES. [2025-02-08 08:41:48,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84043 conditions, 10756 events. 7257/10756 cut-off events. For 185266/186018 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 62984 event pairs, 383 based on Foata normal form. 256/10909 useless extension candidates. Maximal degree in co-relation 82352. Up to 6880 conditions per place. [2025-02-08 08:41:48,377 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 539 selfloop transitions, 498 changer transitions 1/1135 dead transitions. [2025-02-08 08:41:48,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 1135 transitions, 24146 flow [2025-02-08 08:41:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 08:41:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-08 08:41:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 276 transitions. [2025-02-08 08:41:48,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2025-02-08 08:41:48,378 INFO L175 Difference]: Start difference. First operand has 169 places, 755 transitions, 15240 flow. Second operand 12 states and 276 transitions. [2025-02-08 08:41:48,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 1135 transitions, 24146 flow [2025-02-08 08:41:49,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 1135 transitions, 23928 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:49,753 INFO L231 Difference]: Finished difference. Result has 182 places, 1007 transitions, 23001 flow [2025-02-08 08:41:49,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15085, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23001, PETRI_PLACES=182, PETRI_TRANSITIONS=1007} [2025-02-08 08:41:49,754 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2025-02-08 08:41:49,754 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 1007 transitions, 23001 flow [2025-02-08 08:41:49,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 17.444444444444443) internal successors, (471), 27 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:49,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:49,754 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:49,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:49,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:49,956 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:49,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:49,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2060225647, now seen corresponding path program 1 times [2025-02-08 08:41:49,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:49,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590593072] [2025-02-08 08:41:49,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:49,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:49,962 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:41:49,979 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:41:49,980 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:49,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:50,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590593072] [2025-02-08 08:41:50,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590593072] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:50,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:50,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:41:50,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139903192] [2025-02-08 08:41:50,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:50,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:41:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:50,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:41:50,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:41:50,252 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2025-02-08 08:41:50,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 1007 transitions, 23001 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:50,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:50,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2025-02-08 08:41:50,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:52,343 INFO L124 PetriNetUnfolderBase]: 8912/13329 cut-off events. [2025-02-08 08:41:52,344 INFO L125 PetriNetUnfolderBase]: For 304509/305774 co-relation queries the response was YES. [2025-02-08 08:41:52,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115059 conditions, 13329 events. 8912/13329 cut-off events. For 304509/305774 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 81707 event pairs, 507 based on Foata normal form. 472/13524 useless extension candidates. Maximal degree in co-relation 114281. Up to 8318 conditions per place. [2025-02-08 08:41:52,490 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 669 selfloop transitions, 518 changer transitions 17/1487 dead transitions. [2025-02-08 08:41:52,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 1487 transitions, 36256 flow [2025-02-08 08:41:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2025-02-08 08:41:52,491 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2025-02-08 08:41:52,492 INFO L175 Difference]: Start difference. First operand has 182 places, 1007 transitions, 23001 flow. Second operand 8 states and 209 transitions. [2025-02-08 08:41:52,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 1487 transitions, 36256 flow [2025-02-08 08:41:55,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 1487 transitions, 35716 flow, removed 167 selfloop flow, removed 3 redundant places. [2025-02-08 08:41:55,043 INFO L231 Difference]: Finished difference. Result has 191 places, 1346 transitions, 33558 flow [2025-02-08 08:41:55,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22663, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=33558, PETRI_PLACES=191, PETRI_TRANSITIONS=1346} [2025-02-08 08:41:55,044 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2025-02-08 08:41:55,044 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 1346 transitions, 33558 flow [2025-02-08 08:41:55,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:55,044 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:55,044 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:55,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-02-08 08:41:55,044 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:41:55,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:55,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1424991569, now seen corresponding path program 2 times [2025-02-08 08:41:55,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:55,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176388434] [2025-02-08 08:41:55,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:55,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:55,052 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 08:41:55,061 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:41:55,061 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:55,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:55,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:55,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176388434] [2025-02-08 08:41:55,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176388434] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:55,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894331538] [2025-02-08 08:41:55,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:55,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:55,180 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:55,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-08 08:41:55,217 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 08:41:55,259 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:41:55,259 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:55,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:55,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-08 08:41:55,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:55,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-02-08 08:41:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:55,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:55,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:55,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2025-02-08 08:41:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:55,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894331538] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:55,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:55,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 15 [2025-02-08 08:41:55,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329699193] [2025-02-08 08:41:55,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:55,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:41:55,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:55,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:41:55,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:41:55,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2025-02-08 08:41:55,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 1346 transitions, 33558 flow. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:55,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:55,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2025-02-08 08:41:55,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:58,986 INFO L124 PetriNetUnfolderBase]: 9560/14282 cut-off events. [2025-02-08 08:41:58,986 INFO L125 PetriNetUnfolderBase]: For 356519/357965 co-relation queries the response was YES. [2025-02-08 08:41:59,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129498 conditions, 14282 events. 9560/14282 cut-off events. For 356519/357965 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 88165 event pairs, 659 based on Foata normal form. 602/14545 useless extension candidates. Maximal degree in co-relation 128740. Up to 9874 conditions per place. [2025-02-08 08:41:59,176 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 827 selfloop transitions, 438 changer transitions 15/1557 dead transitions. [2025-02-08 08:41:59,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1557 transitions, 40427 flow [2025-02-08 08:41:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2025-02-08 08:41:59,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2025-02-08 08:41:59,178 INFO L175 Difference]: Start difference. First operand has 191 places, 1346 transitions, 33558 flow. Second operand 8 states and 206 transitions. [2025-02-08 08:41:59,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1557 transitions, 40427 flow [2025-02-08 08:42:02,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 1557 transitions, 40268 flow, removed 78 selfloop flow, removed 1 redundant places. [2025-02-08 08:42:02,549 INFO L231 Difference]: Finished difference. Result has 200 places, 1458 transitions, 37829 flow [2025-02-08 08:42:02,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=33399, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=37829, PETRI_PLACES=200, PETRI_TRANSITIONS=1458} [2025-02-08 08:42:02,550 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2025-02-08 08:42:02,550 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 1458 transitions, 37829 flow [2025-02-08 08:42:02,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:02,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:42:02,551 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:42:02,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-08 08:42:02,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-08 08:42:02,755 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:42:02,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:42:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash 162832321, now seen corresponding path program 2 times [2025-02-08 08:42:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:42:02,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406560860] [2025-02-08 08:42:02,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:42:02,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:42:02,759 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 08:42:02,768 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:42:02,768 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:42:02,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:42:03,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:42:03,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406560860] [2025-02-08 08:42:03,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406560860] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:42:03,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564993150] [2025-02-08 08:42:03,115 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:42:03,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:03,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:42:03,117 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:42:03,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-08 08:42:03,156 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 08:42:03,172 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:42:03,172 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:42:03,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:03,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-08 08:42:03,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:42:03,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-02-08 08:42:03,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:42:03,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-02-08 08:42:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:42:03,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:42:03,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 34 [2025-02-08 08:42:03,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:42:03,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-02-08 08:42:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:42:04,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564993150] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:42:04,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:42:04,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2025-02-08 08:42:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33834244] [2025-02-08 08:42:04,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:42:04,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 08:42:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:42:04,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 08:42:04,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-02-08 08:42:04,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:42:04,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 1458 transitions, 37829 flow. Second operand has 25 states, 25 states have (on average 17.24) internal successors, (431), 25 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:04,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:42:04,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:42:04,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:42:09,245 INFO L124 PetriNetUnfolderBase]: 12671/18677 cut-off events. [2025-02-08 08:42:09,245 INFO L125 PetriNetUnfolderBase]: For 466158/468008 co-relation queries the response was YES. [2025-02-08 08:42:09,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175293 conditions, 18677 events. 12671/18677 cut-off events. For 466158/468008 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 117026 event pairs, 565 based on Foata normal form. 783/19279 useless extension candidates. Maximal degree in co-relation 174513. Up to 10774 conditions per place. [2025-02-08 08:42:09,677 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 897 selfloop transitions, 1243 changer transitions 1/2238 dead transitions. [2025-02-08 08:42:09,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 2238 transitions, 59702 flow [2025-02-08 08:42:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-08 08:42:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-08 08:42:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 415 transitions. [2025-02-08 08:42:09,678 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5623306233062331 [2025-02-08 08:42:09,678 INFO L175 Difference]: Start difference. First operand has 200 places, 1458 transitions, 37829 flow. Second operand 18 states and 415 transitions. [2025-02-08 08:42:09,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 2238 transitions, 59702 flow [2025-02-08 08:42:14,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 2238 transitions, 58605 flow, removed 298 selfloop flow, removed 3 redundant places. [2025-02-08 08:42:14,235 INFO L231 Difference]: Finished difference. Result has 223 places, 1960 transitions, 54315 flow [2025-02-08 08:42:14,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=37006, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=54315, PETRI_PLACES=223, PETRI_TRANSITIONS=1960} [2025-02-08 08:42:14,237 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2025-02-08 08:42:14,237 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 1960 transitions, 54315 flow [2025-02-08 08:42:14,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 17.24) internal successors, (431), 25 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:14,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:42:14,237 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:42:14,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-08 08:42:14,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:14,441 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:42:14,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:42:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1558679059, now seen corresponding path program 3 times [2025-02-08 08:42:14,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:42:14,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183279210] [2025-02-08 08:42:14,441 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:42:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:42:14,445 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-02-08 08:42:14,451 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 25 statements. [2025-02-08 08:42:14,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:42:14,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:42:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:42:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183279210] [2025-02-08 08:42:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183279210] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:42:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701546515] [2025-02-08 08:42:14,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:42:14,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:14,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:42:14,703 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:42:14,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-08 08:42:14,743 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-02-08 08:42:14,758 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 25 statements. [2025-02-08 08:42:14,758 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:42:14,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:14,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-08 08:42:14,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:42:14,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-02-08 08:42:14,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:42:14,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-02-08 08:42:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:42:14,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:42:15,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 34 [2025-02-08 08:42:15,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:42:15,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-02-08 08:42:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:42:15,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701546515] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:42:15,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:42:15,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2025-02-08 08:42:15,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058267761] [2025-02-08 08:42:15,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:42:15,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 08:42:15,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:42:15,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 08:42:15,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2025-02-08 08:42:15,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:42:15,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 1960 transitions, 54315 flow. Second operand has 23 states, 23 states have (on average 17.26086956521739) internal successors, (397), 23 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:15,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:42:15,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:42:15,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:42:22,217 INFO L124 PetriNetUnfolderBase]: 13955/20565 cut-off events. [2025-02-08 08:42:22,218 INFO L125 PetriNetUnfolderBase]: For 554378/556249 co-relation queries the response was YES. [2025-02-08 08:42:22,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205038 conditions, 20565 events. 13955/20565 cut-off events. For 554378/556249 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 130376 event pairs, 716 based on Foata normal form. 607/20945 useless extension candidates. Maximal degree in co-relation 204216. Up to 12194 conditions per place. [2025-02-08 08:42:22,481 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 977 selfloop transitions, 1385 changer transitions 1/2460 dead transitions. [2025-02-08 08:42:22,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 2460 transitions, 69254 flow [2025-02-08 08:42:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-08 08:42:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-08 08:42:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 407 transitions. [2025-02-08 08:42:22,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.551490514905149 [2025-02-08 08:42:22,482 INFO L175 Difference]: Start difference. First operand has 223 places, 1960 transitions, 54315 flow. Second operand 18 states and 407 transitions. [2025-02-08 08:42:22,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 2460 transitions, 69254 flow [2025-02-08 08:42:29,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 2460 transitions, 67398 flow, removed 332 selfloop flow, removed 8 redundant places. [2025-02-08 08:42:29,408 INFO L231 Difference]: Finished difference. Result has 240 places, 2227 transitions, 63173 flow [2025-02-08 08:42:29,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=52517, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=63173, PETRI_PLACES=240, PETRI_TRANSITIONS=2227} [2025-02-08 08:42:29,410 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2025-02-08 08:42:29,410 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 2227 transitions, 63173 flow [2025-02-08 08:42:29,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.26086956521739) internal successors, (397), 23 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:29,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:42:29,411 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:42:29,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-08 08:42:29,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-08 08:42:29,615 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:42:29,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:42:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1908898411, now seen corresponding path program 3 times [2025-02-08 08:42:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:42:29,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013380801] [2025-02-08 08:42:29,616 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:42:29,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:42:29,619 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-02-08 08:42:29,625 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 25 statements. [2025-02-08 08:42:29,625 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:42:29,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:42:29,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:42:29,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013380801] [2025-02-08 08:42:29,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013380801] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:42:29,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710550749] [2025-02-08 08:42:29,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:42:29,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:29,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:42:29,817 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:42:29,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-08 08:42:29,861 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-02-08 08:42:29,875 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 25 statements. [2025-02-08 08:42:29,875 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:42:29,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:29,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-08 08:42:29,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:42:29,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-02-08 08:42:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:42:30,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:42:30,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:42:30,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2025-02-08 08:42:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:42:30,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710550749] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:42:30,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:42:30,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 14 [2025-02-08 08:42:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830499040] [2025-02-08 08:42:30,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:42:30,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:42:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:42:30,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:42:30,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:42:30,483 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2025-02-08 08:42:30,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 2227 transitions, 63173 flow. Second operand has 15 states, 15 states have (on average 19.533333333333335) internal successors, (293), 15 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:30,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:42:30,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2025-02-08 08:42:30,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:42:36,225 INFO L124 PetriNetUnfolderBase]: 13657/20520 cut-off events. [2025-02-08 08:42:36,225 INFO L125 PetriNetUnfolderBase]: For 608541/610559 co-relation queries the response was YES. [2025-02-08 08:42:36,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216299 conditions, 20520 events. 13657/20520 cut-off events. For 608541/610559 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 135510 event pairs, 487 based on Foata normal form. 586/20613 useless extension candidates. Maximal degree in co-relation 215427. Up to 11762 conditions per place. [2025-02-08 08:42:36,433 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 1046 selfloop transitions, 1001 changer transitions 13/2449 dead transitions. [2025-02-08 08:42:36,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 2449 transitions, 71808 flow [2025-02-08 08:42:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:42:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:42:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2025-02-08 08:42:36,434 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6554878048780488 [2025-02-08 08:42:36,434 INFO L175 Difference]: Start difference. First operand has 240 places, 2227 transitions, 63173 flow. Second operand 8 states and 215 transitions. [2025-02-08 08:42:36,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 2449 transitions, 71808 flow [2025-02-08 08:42:44,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 2449 transitions, 69986 flow, removed 494 selfloop flow, removed 3 redundant places. [2025-02-08 08:42:44,323 INFO L231 Difference]: Finished difference. Result has 247 places, 2319 transitions, 67090 flow [2025-02-08 08:42:44,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=61428, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=67090, PETRI_PLACES=247, PETRI_TRANSITIONS=2319} [2025-02-08 08:42:44,325 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2025-02-08 08:42:44,326 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 2319 transitions, 67090 flow [2025-02-08 08:42:44,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.533333333333335) internal successors, (293), 15 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:44,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:42:44,326 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:42:44,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-08 08:42:44,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:44,527 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:42:44,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:42:44,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1399103595, now seen corresponding path program 4 times [2025-02-08 08:42:44,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:42:44,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526765919] [2025-02-08 08:42:44,528 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:42:44,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:42:44,531 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-08 08:42:44,537 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:42:44,538 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:42:44,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:42:44,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:42:44,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526765919] [2025-02-08 08:42:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526765919] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:42:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692885776] [2025-02-08 08:42:44,761 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:42:44,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:44,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:42:44,766 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:42:44,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-08 08:42:44,808 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-08 08:42:44,823 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:42:44,824 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:42:44,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:44,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-08 08:42:44,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:42:44,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-02-08 08:42:45,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-02-08 08:42:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:42:45,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:42:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:42:45,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692885776] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:42:45,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:42:45,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 25 [2025-02-08 08:42:45,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446180846] [2025-02-08 08:42:45,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:42:45,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-08 08:42:45,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:42:45,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-08 08:42:45,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2025-02-08 08:42:45,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2025-02-08 08:42:45,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 2319 transitions, 67090 flow. Second operand has 26 states, 26 states have (on average 17.53846153846154) internal successors, (456), 26 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:45,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:42:45,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2025-02-08 08:42:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand