./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-simple-array-sum.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-simple-array-sum.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 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:43:16,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:43:16,399 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:43:16,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:43:16,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:43:16,431 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:43:16,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:43:16,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:43:16,433 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:43:16,433 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:43:16,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:43:16,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:43:16,435 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:43:16,435 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:43:16,435 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:43:16,436 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:43:16,436 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:43:16,436 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:43:16,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:43:16,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:43:16,436 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:43:16,437 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:43:16,437 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:43:16,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:43:16,437 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:43:16,437 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:43:16,437 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:43:16,437 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:43:16,437 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:43:16,437 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:43:16,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:43:16,438 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:43:16,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:43:16,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:43:16,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:43:16,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:43:16,439 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:43:16,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:43:16,439 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:43:16,439 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:43:16,439 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:43:16,439 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:43:16,439 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 -> 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 [2025-02-08 08:43:16,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:43:16,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:43:16,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:43:16,773 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:43:16,773 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:43:16,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2025-02-08 08:43:18,117 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dfba940fd/c75c3ee3655b4c1bb5a945f8e873aab0/FLAG374746a71 [2025-02-08 08:43:18,385 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:43:18,385 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2025-02-08 08:43:18,392 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dfba940fd/c75c3ee3655b4c1bb5a945f8e873aab0/FLAG374746a71 [2025-02-08 08:43:18,405 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dfba940fd/c75c3ee3655b4c1bb5a945f8e873aab0 [2025-02-08 08:43:18,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:43:18,408 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:43:18,409 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:43:18,409 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:43:18,412 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:43:18,413 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a352af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18, skipping insertion in model container [2025-02-08 08:43:18,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,427 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:43:18,561 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 08:43:18,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:43:18,571 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:43:18,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:43:18,608 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:43:18,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18 WrapperNode [2025-02-08 08:43:18,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:43:18,609 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:43:18,609 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:43:18,610 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:43:18,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,624 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,640 INFO L138 Inliner]: procedures = 23, calls = 21, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 105 [2025-02-08 08:43:18,641 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:43:18,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:43:18,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:43:18,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:43:18,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,650 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,664 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-08 08:43:18,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,672 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,673 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:43:18,678 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:43:18,678 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:43:18,679 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:43:18,679 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (1/1) ... [2025-02-08 08:43:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:43:18,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:18,706 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 08:43:18,708 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 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:43:18,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:43:18,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:43:18,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:43:18,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:43:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:43:18,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:43:18,726 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 08:43:18,833 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:43:18,834 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:43:19,196 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:43:19,197 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:43:19,418 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:43:19,419 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:43:19,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:43:19 BoogieIcfgContainer [2025-02-08 08:43:19,419 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:43:19,421 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:43:19,421 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:43:19,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:43:19,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:43:18" (1/3) ... [2025-02-08 08:43:19,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c2234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:43:19, skipping insertion in model container [2025-02-08 08:43:19,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:43:18" (2/3) ... [2025-02-08 08:43:19,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c2234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:43:19, skipping insertion in model container [2025-02-08 08:43:19,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:43:19" (3/3) ... [2025-02-08 08:43:19,432 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2025-02-08 08:43:19,445 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:43:19,446 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-simple-array-sum.wvr.c that has 4 procedures, 52 locations, 1 initial locations, 5 loop locations, and 14 error locations. [2025-02-08 08:43:19,447 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:43:19,517 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:43:19,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 135 flow [2025-02-08 08:43:19,587 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2025-02-08 08:43:19,590 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:43:19,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 54 events. 6/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 38. Up to 3 conditions per place. [2025-02-08 08:43:19,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 135 flow [2025-02-08 08:43:19,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 124 flow [2025-02-08 08:43:19,608 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:43:19,620 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;@3ff97787, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:43:19,621 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2025-02-08 08:43:19,624 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:43:19,624 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:43:19,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:43:19,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:19,625 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:43:19,625 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:19,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash 436732, now seen corresponding path program 1 times [2025-02-08 08:43:19,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:19,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931824065] [2025-02-08 08:43:19,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:19,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:19,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:43:19,733 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:43:19,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:19,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:19,884 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 08:43:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:19,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931824065] [2025-02-08 08:43:19,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931824065] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:19,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:19,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:43:19,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304692041] [2025-02-08 08:43:19,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:19,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:43:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:19,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:43:19,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:43:19,939 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-08 08:43:19,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 08:43:19,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:19,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-08 08:43:19,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:20,525 INFO L124 PetriNetUnfolderBase]: 2574/3856 cut-off events. [2025-02-08 08:43:20,526 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2025-02-08 08:43:20,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7631 conditions, 3856 events. 2574/3856 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21833 event pairs, 2104 based on Foata normal form. 1/2721 useless extension candidates. Maximal degree in co-relation 7075. Up to 3553 conditions per place. [2025-02-08 08:43:20,569 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 38 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2025-02-08 08:43:20,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 196 flow [2025-02-08 08:43:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:43:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:43:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2025-02-08 08:43:20,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47953216374269003 [2025-02-08 08:43:20,587 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 82 transitions. [2025-02-08 08:43:20,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 196 flow [2025-02-08 08:43:20,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:43:20,602 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 108 flow [2025-02-08 08:43:20,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2025-02-08 08:43:20,608 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2025-02-08 08:43:20,609 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 108 flow [2025-02-08 08:43:20,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 08:43:20,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:20,610 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:43:20,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:43:20,611 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:20,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash 436733, now seen corresponding path program 1 times [2025-02-08 08:43:20,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:20,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012545163] [2025-02-08 08:43:20,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:20,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:20,624 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:43:20,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:43:20,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:20,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:20,931 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 08:43:20,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:20,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012545163] [2025-02-08 08:43:20,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012545163] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:20,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:20,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:43:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496901441] [2025-02-08 08:43:20,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:20,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:20,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:20,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:20,950 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-08 08:43:20,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 08:43:20,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:20,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-08 08:43:20,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:21,416 INFO L124 PetriNetUnfolderBase]: 2575/3859 cut-off events. [2025-02-08 08:43:21,416 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-02-08 08:43:21,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7494 conditions, 3859 events. 2575/3859 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21809 event pairs, 2104 based on Foata normal form. 0/2721 useless extension candidates. Maximal degree in co-relation 7465. Up to 3562 conditions per place. [2025-02-08 08:43:21,444 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 41 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2025-02-08 08:43:21,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 204 flow [2025-02-08 08:43:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-02-08 08:43:21,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2025-02-08 08:43:21,446 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 108 flow. Second operand 4 states and 98 transitions. [2025-02-08 08:43:21,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 204 flow [2025-02-08 08:43:21,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:43:21,450 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 131 flow [2025-02-08 08:43:21,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2025-02-08 08:43:21,451 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2025-02-08 08:43:21,451 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 131 flow [2025-02-08 08:43:21,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 08:43:21,452 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:21,452 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:43:21,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:43:21,452 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:21,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash 13539385, now seen corresponding path program 1 times [2025-02-08 08:43:21,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:21,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393223146] [2025-02-08 08:43:21,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:21,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:21,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:43:21,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:43:21,481 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:21,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:21,582 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 08:43:21,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:21,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393223146] [2025-02-08 08:43:21,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393223146] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:21,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:21,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:21,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916180677] [2025-02-08 08:43:21,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:21,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:21,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:21,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:21,602 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-08 08:43:21,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 131 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 08:43:21,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:21,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-08 08:43:21,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:22,000 INFO L124 PetriNetUnfolderBase]: 2576/3864 cut-off events. [2025-02-08 08:43:22,001 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-02-08 08:43:22,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 3864 events. 2576/3864 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21830 event pairs, 2104 based on Foata normal form. 0/2727 useless extension candidates. Maximal degree in co-relation 7474. Up to 3561 conditions per place. [2025-02-08 08:43:22,030 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 40 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2025-02-08 08:43:22,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 233 flow [2025-02-08 08:43:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2025-02-08 08:43:22,032 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-02-08 08:43:22,032 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 131 flow. Second operand 4 states and 108 transitions. [2025-02-08 08:43:22,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 233 flow [2025-02-08 08:43:22,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:43:22,034 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 162 flow [2025-02-08 08:43:22,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-02-08 08:43:22,035 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2025-02-08 08:43:22,035 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 162 flow [2025-02-08 08:43:22,035 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 08:43:22,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:22,035 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:43:22,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:43:22,036 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:22,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 419714306, now seen corresponding path program 1 times [2025-02-08 08:43:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:22,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282013251] [2025-02-08 08:43:22,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:22,044 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:43:22,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:43:22,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:22,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:22,339 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 08:43:22,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:22,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282013251] [2025-02-08 08:43:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282013251] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:22,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116762784] [2025-02-08 08:43:22,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:22,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:22,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:22,345 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 08:43:22,347 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 08:43:22,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:43:22,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:43:22,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:22,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:22,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:43:22,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:22,483 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 08:43:22,626 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 08:43:22,627 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:22,728 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 08:43:22,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116762784] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:22,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:22,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:43:22,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556977952] [2025-02-08 08:43:22,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:22,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:43:22,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:22,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:43:22,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:43:22,770 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-08 08:43:22,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 162 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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 08:43:22,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:22,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-08 08:43:22,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:23,258 INFO L124 PetriNetUnfolderBase]: 2577/3866 cut-off events. [2025-02-08 08:43:23,258 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2025-02-08 08:43:23,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7538 conditions, 3866 events. 2577/3866 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 21876 event pairs, 2104 based on Foata normal form. 0/2732 useless extension candidates. Maximal degree in co-relation 7478. Up to 3564 conditions per place. [2025-02-08 08:43:23,284 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 40 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2025-02-08 08:43:23,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 57 transitions, 273 flow [2025-02-08 08:43:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:43:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:43:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2025-02-08 08:43:23,287 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3355263157894737 [2025-02-08 08:43:23,287 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 162 flow. Second operand 8 states and 153 transitions. [2025-02-08 08:43:23,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 57 transitions, 273 flow [2025-02-08 08:43:23,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 273 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:43:23,314 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 193 flow [2025-02-08 08:43:23,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=193, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2025-02-08 08:43:23,315 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2025-02-08 08:43:23,315 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 193 flow [2025-02-08 08:43:23,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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 08:43:23,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:23,315 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:43:23,325 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 08:43:23,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:23,516 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:23,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:23,517 INFO L85 PathProgramCache]: Analyzing trace with hash 126242260, now seen corresponding path program 1 times [2025-02-08 08:43:23,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:23,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648977207] [2025-02-08 08:43:23,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:23,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:23,525 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:43:23,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:43:23,541 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:23,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:23,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648977207] [2025-02-08 08:43:23,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648977207] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954021081] [2025-02-08 08:43:23,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:23,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:23,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:23,735 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 08:43:23,737 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 08:43:23,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:43:23,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:43:23,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:23,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:23,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-08 08:43:23,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:23,818 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 08:43:23,951 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:43:23,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2025-02-08 08:43:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:23,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:24,067 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 08:43:24,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954021081] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:24,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:43:24,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2025-02-08 08:43:24,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773943345] [2025-02-08 08:43:24,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:24,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:24,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:24,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:24,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:43:24,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-08 08:43:24,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 08:43:24,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:24,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-08 08:43:24,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:24,760 INFO L124 PetriNetUnfolderBase]: 5148/7712 cut-off events. [2025-02-08 08:43:24,761 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2025-02-08 08:43:24,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15012 conditions, 7712 events. 5148/7712 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 48755 event pairs, 4208 based on Foata normal form. 1/5467 useless extension candidates. Maximal degree in co-relation 7511. Up to 3562 conditions per place. [2025-02-08 08:43:24,800 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 77 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2025-02-08 08:43:24,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 437 flow [2025-02-08 08:43:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:43:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:43:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-02-08 08:43:24,803 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2025-02-08 08:43:24,803 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 193 flow. Second operand 5 states and 147 transitions. [2025-02-08 08:43:24,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 437 flow [2025-02-08 08:43:24,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 395 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-08 08:43:24,807 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 171 flow [2025-02-08 08:43:24,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2025-02-08 08:43:24,809 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2025-02-08 08:43:24,810 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 171 flow [2025-02-08 08:43:24,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 08:43:24,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:24,810 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:24,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 08:43:25,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:25,015 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:25,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash -372694197, now seen corresponding path program 1 times [2025-02-08 08:43:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:25,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049304616] [2025-02-08 08:43:25,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:25,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:43:25,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:43:25,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:25,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:25,102 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 08:43:25,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:25,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049304616] [2025-02-08 08:43:25,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049304616] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:25,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:25,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:43:25,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805843919] [2025-02-08 08:43:25,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:25,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:25,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:25,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:25,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:43:25,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:25,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 08:43:25,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:25,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:25,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:25,775 INFO L124 PetriNetUnfolderBase]: 5351/8147 cut-off events. [2025-02-08 08:43:25,775 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2025-02-08 08:43:25,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15903 conditions, 8147 events. 5351/8147 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 50686 event pairs, 3456 based on Foata normal form. 0/5925 useless extension candidates. Maximal degree in co-relation 8643. Up to 4115 conditions per place. [2025-02-08 08:43:25,821 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 92 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2025-02-08 08:43:25,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 109 transitions, 489 flow [2025-02-08 08:43:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:43:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:43:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2025-02-08 08:43:25,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5380116959064327 [2025-02-08 08:43:25,824 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 171 flow. Second operand 6 states and 184 transitions. [2025-02-08 08:43:25,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 109 transitions, 489 flow [2025-02-08 08:43:25,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 472 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:43:25,828 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 190 flow [2025-02-08 08:43:25,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2025-02-08 08:43:25,830 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2025-02-08 08:43:25,831 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 190 flow [2025-02-08 08:43:25,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 08:43:25,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:25,831 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:25,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:43:25,832 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:25,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1059740882, now seen corresponding path program 1 times [2025-02-08 08:43:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:25,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223325341] [2025-02-08 08:43:25,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:25,841 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:43:25,849 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:43:25,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:25,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:43:25,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:25,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223325341] [2025-02-08 08:43:25,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223325341] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:25,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556756013] [2025-02-08 08:43:25,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:25,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:25,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:25,971 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 08:43:25,973 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 08:43:26,015 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:43:26,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:43:26,030 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:26,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:26,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:43:26,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:43:26,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:43:26,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556756013] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:26,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:26,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-08 08:43:26,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690973216] [2025-02-08 08:43:26,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:26,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:43:26,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:26,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:43:26,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:43:26,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-08 08:43:26,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 16.53846153846154) internal successors, (215), 13 states have internal predecessors, (215), 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 08:43:26,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:26,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-08 08:43:26,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:27,025 INFO L124 PetriNetUnfolderBase]: 6287/9471 cut-off events. [2025-02-08 08:43:27,025 INFO L125 PetriNetUnfolderBase]: For 1687/1888 co-relation queries the response was YES. [2025-02-08 08:43:27,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19913 conditions, 9471 events. 6287/9471 cut-off events. For 1687/1888 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 59900 event pairs, 5244 based on Foata normal form. 1/6809 useless extension candidates. Maximal degree in co-relation 7812. Up to 5283 conditions per place. [2025-02-08 08:43:27,074 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 74 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2025-02-08 08:43:27,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 491 flow [2025-02-08 08:43:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:43:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:43:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2025-02-08 08:43:27,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4405458089668616 [2025-02-08 08:43:27,078 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 190 flow. Second operand 9 states and 226 transitions. [2025-02-08 08:43:27,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 491 flow [2025-02-08 08:43:27,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 474 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:43:27,085 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 258 flow [2025-02-08 08:43:27,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=258, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2025-02-08 08:43:27,087 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2025-02-08 08:43:27,087 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 258 flow [2025-02-08 08:43:27,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.53846153846154) internal successors, (215), 13 states have internal predecessors, (215), 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 08:43:27,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:27,087 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:27,095 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 08:43:27,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:27,288 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:27,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1718320031, now seen corresponding path program 1 times [2025-02-08 08:43:27,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:27,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091604653] [2025-02-08 08:43:27,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:27,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:27,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:43:27,299 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:43:27,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:27,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:27,366 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 08:43:27,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:27,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091604653] [2025-02-08 08:43:27,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091604653] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:27,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:27,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:43:27,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49980014] [2025-02-08 08:43:27,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:27,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:27,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:27,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:27,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:43:27,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:27,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 08:43:27,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:27,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:27,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:28,024 INFO L124 PetriNetUnfolderBase]: 5983/9001 cut-off events. [2025-02-08 08:43:28,025 INFO L125 PetriNetUnfolderBase]: For 1179/1531 co-relation queries the response was YES. [2025-02-08 08:43:28,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18458 conditions, 9001 events. 5983/9001 cut-off events. For 1179/1531 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 54249 event pairs, 4818 based on Foata normal form. 0/6344 useless extension candidates. Maximal degree in co-relation 8586. Up to 7819 conditions per place. [2025-02-08 08:43:28,062 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 79 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2025-02-08 08:43:28,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 528 flow [2025-02-08 08:43:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:43:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:43:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2025-02-08 08:43:28,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48830409356725146 [2025-02-08 08:43:28,063 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 258 flow. Second operand 6 states and 167 transitions. [2025-02-08 08:43:28,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 528 flow [2025-02-08 08:43:28,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 496 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-02-08 08:43:28,070 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 267 flow [2025-02-08 08:43:28,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2025-02-08 08:43:28,073 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2025-02-08 08:43:28,073 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 267 flow [2025-02-08 08:43:28,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 08:43:28,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:28,073 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2025-02-08 08:43:28,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:43:28,073 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:28,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:28,074 INFO L85 PathProgramCache]: Analyzing trace with hash 294112493, now seen corresponding path program 2 times [2025-02-08 08:43:28,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:28,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749235717] [2025-02-08 08:43:28,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:28,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:28,083 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-08 08:43:28,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:43:28,108 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:28,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:43:28,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:28,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749235717] [2025-02-08 08:43:28,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749235717] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:28,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395685553] [2025-02-08 08:43:28,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:28,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:28,276 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 08:43:28,279 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 08:43:28,320 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-08 08:43:28,343 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:43:28,343 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:28,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:28,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:43:28,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:28,392 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 08:43:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:43:28,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:43:28,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395685553] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:28,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:28,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-02-08 08:43:28,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578636349] [2025-02-08 08:43:28,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:28,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:43:28,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:28,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:43:28,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:43:28,813 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-08 08:43:28,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 267 flow. Second operand has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 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 08:43:28,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:28,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-08 08:43:28,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:29,622 INFO L124 PetriNetUnfolderBase]: 5329/8079 cut-off events. [2025-02-08 08:43:29,622 INFO L125 PetriNetUnfolderBase]: For 1629/1947 co-relation queries the response was YES. [2025-02-08 08:43:29,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17574 conditions, 8079 events. 5329/8079 cut-off events. For 1629/1947 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 51605 event pairs, 4488 based on Foata normal form. 2/5983 useless extension candidates. Maximal degree in co-relation 8026. Up to 7590 conditions per place. [2025-02-08 08:43:29,669 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 38 selfloop transitions, 22 changer transitions 0/67 dead transitions. [2025-02-08 08:43:29,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 67 transitions, 391 flow [2025-02-08 08:43:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:43:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:43:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2025-02-08 08:43:29,671 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3458646616541353 [2025-02-08 08:43:29,672 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 267 flow. Second operand 7 states and 138 transitions. [2025-02-08 08:43:29,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 67 transitions, 391 flow [2025-02-08 08:43:29,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 67 transitions, 368 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:43:29,679 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 292 flow [2025-02-08 08:43:29,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2025-02-08 08:43:29,680 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2025-02-08 08:43:29,680 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 292 flow [2025-02-08 08:43:29,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 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 08:43:29,681 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:29,681 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:29,689 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 08:43:29,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-08 08:43:29,886 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:29,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:29,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1561564142, now seen corresponding path program 1 times [2025-02-08 08:43:29,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:29,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668577309] [2025-02-08 08:43:29,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:29,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:29,894 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:43:29,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:43:29,906 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:29,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:30,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668577309] [2025-02-08 08:43:30,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668577309] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659789877] [2025-02-08 08:43:30,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:30,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:30,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:30,140 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 08:43:30,142 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 08:43:30,192 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:43:30,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:43:30,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:30,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:30,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-08 08:43:30,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:30,228 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 08:43:30,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:43:30,314 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:43:30,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2025-02-08 08:43:30,344 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:43:30,344 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 11 treesize of output 11 [2025-02-08 08:43:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:43:30,560 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:43:30,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659789877] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:30,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:43:30,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2025-02-08 08:43:30,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518271688] [2025-02-08 08:43:30,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:30,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:43:30,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:30,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:43:30,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:43:30,917 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-08 08:43:30,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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 08:43:30,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:30,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-08 08:43:30,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:31,695 INFO L124 PetriNetUnfolderBase]: 7337/11051 cut-off events. [2025-02-08 08:43:31,695 INFO L125 PetriNetUnfolderBase]: For 1919/2475 co-relation queries the response was YES. [2025-02-08 08:43:31,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23743 conditions, 11051 events. 7337/11051 cut-off events. For 1919/2475 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 71098 event pairs, 3776 based on Foata normal form. 0/8032 useless extension candidates. Maximal degree in co-relation 11101. Up to 5997 conditions per place. [2025-02-08 08:43:31,752 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 86 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2025-02-08 08:43:31,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 109 transitions, 594 flow [2025-02-08 08:43:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:43:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:43:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2025-02-08 08:43:31,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2025-02-08 08:43:31,754 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 292 flow. Second operand 7 states and 195 transitions. [2025-02-08 08:43:31,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 109 transitions, 594 flow [2025-02-08 08:43:31,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 587 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-02-08 08:43:31,763 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 340 flow [2025-02-08 08:43:31,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=340, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2025-02-08 08:43:31,764 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2025-02-08 08:43:31,764 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 340 flow [2025-02-08 08:43:31,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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 08:43:31,764 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:31,765 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:31,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 08:43:31,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-08 08:43:31,969 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:31,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:31,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1561564143, now seen corresponding path program 1 times [2025-02-08 08:43:31,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:31,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014591221] [2025-02-08 08:43:31,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:31,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:31,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:43:31,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:43:31,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:31,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:43:32,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:32,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014591221] [2025-02-08 08:43:32,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014591221] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:32,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:32,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237845943] [2025-02-08 08:43:32,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:32,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:32,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:32,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:32,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:43:32,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-08 08:43:32,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 340 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:32,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:32,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-08 08:43:32,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:32,526 INFO L124 PetriNetUnfolderBase]: 5125/7757 cut-off events. [2025-02-08 08:43:32,526 INFO L125 PetriNetUnfolderBase]: For 7077/7567 co-relation queries the response was YES. [2025-02-08 08:43:32,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20378 conditions, 7757 events. 5125/7757 cut-off events. For 7077/7567 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 46997 event pairs, 4050 based on Foata normal form. 580/7146 useless extension candidates. Maximal degree in co-relation 10899. Up to 7180 conditions per place. [2025-02-08 08:43:32,552 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 50 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2025-02-08 08:43:32,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 456 flow [2025-02-08 08:43:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:43:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:43:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2025-02-08 08:43:32,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-02-08 08:43:32,553 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 340 flow. Second operand 5 states and 105 transitions. [2025-02-08 08:43:32,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 456 flow [2025-02-08 08:43:32,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 433 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-08 08:43:32,559 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 333 flow [2025-02-08 08:43:32,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2025-02-08 08:43:32,559 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2025-02-08 08:43:32,559 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 333 flow [2025-02-08 08:43:32,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:32,560 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:32,560 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:32,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:43:32,560 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:32,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:32,560 INFO L85 PathProgramCache]: Analyzing trace with hash -222688739, now seen corresponding path program 1 times [2025-02-08 08:43:32,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:32,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077167376] [2025-02-08 08:43:32,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:32,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:32,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:43:32,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:43:32,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:32,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:32,603 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 08:43:32,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077167376] [2025-02-08 08:43:32,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077167376] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:32,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:32,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:32,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075957106] [2025-02-08 08:43:32,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:32,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:32,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:32,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:32,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:32,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:32,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 08:43:32,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:32,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:32,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:33,165 INFO L124 PetriNetUnfolderBase]: 7019/10459 cut-off events. [2025-02-08 08:43:33,165 INFO L125 PetriNetUnfolderBase]: For 8921/9867 co-relation queries the response was YES. [2025-02-08 08:43:33,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26658 conditions, 10459 events. 7019/10459 cut-off events. For 8921/9867 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 59385 event pairs, 1562 based on Foata normal form. 232/9267 useless extension candidates. Maximal degree in co-relation 13651. Up to 6763 conditions per place. [2025-02-08 08:43:33,211 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 102 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2025-02-08 08:43:33,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 713 flow [2025-02-08 08:43:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2025-02-08 08:43:33,212 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-02-08 08:43:33,212 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 333 flow. Second operand 4 states and 133 transitions. [2025-02-08 08:43:33,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 713 flow [2025-02-08 08:43:33,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 699 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:43:33,219 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 344 flow [2025-02-08 08:43:33,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2025-02-08 08:43:33,219 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2025-02-08 08:43:33,219 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 344 flow [2025-02-08 08:43:33,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 08:43:33,220 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:33,220 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:33,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 08:43:33,220 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:33,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1761036439, now seen corresponding path program 1 times [2025-02-08 08:43:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:33,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200196684] [2025-02-08 08:43:33,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:33,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:33,228 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:43:33,240 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:43:33,240 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:33,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:33,400 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 08:43:33,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:33,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200196684] [2025-02-08 08:43:33,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200196684] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:33,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545543905] [2025-02-08 08:43:33,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:33,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:33,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:33,403 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 08:43:33,405 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 08:43:33,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:43:33,467 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:43:33,468 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:33,468 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:33,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-08 08:43:33,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:33,477 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 08:43:33,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:43:33,525 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:43:33,526 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 11 treesize of output 11 [2025-02-08 08:43:33,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2025-02-08 08:43:33,774 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 08:43:33,775 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:43:33,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545543905] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:33,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:43:33,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2025-02-08 08:43:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439344712] [2025-02-08 08:43:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:33,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:43:33,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:33,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:43:33,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:43:34,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-08 08:43:34,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 08:43:34,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:34,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-08 08:43:34,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:34,633 INFO L124 PetriNetUnfolderBase]: 6077/9241 cut-off events. [2025-02-08 08:43:34,633 INFO L125 PetriNetUnfolderBase]: For 8947/9725 co-relation queries the response was YES. [2025-02-08 08:43:34,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24819 conditions, 9241 events. 6077/9241 cut-off events. For 8947/9725 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 54955 event pairs, 1786 based on Foata normal form. 0/7984 useless extension candidates. Maximal degree in co-relation 12748. Up to 5432 conditions per place. [2025-02-08 08:43:34,675 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 80 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2025-02-08 08:43:34,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 103 transitions, 648 flow [2025-02-08 08:43:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:43:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:43:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2025-02-08 08:43:34,677 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45363408521303256 [2025-02-08 08:43:34,677 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 344 flow. Second operand 7 states and 181 transitions. [2025-02-08 08:43:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 103 transitions, 648 flow [2025-02-08 08:43:34,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 648 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:43:34,685 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 399 flow [2025-02-08 08:43:34,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=399, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2025-02-08 08:43:34,686 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2025-02-08 08:43:34,686 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 399 flow [2025-02-08 08:43:34,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 08:43:34,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:34,686 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:34,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 08:43:34,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-08 08:43:34,887 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:34,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1766118694, now seen corresponding path program 1 times [2025-02-08 08:43:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:34,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390738432] [2025-02-08 08:43:34,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:34,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:34,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:43:34,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:43:34,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:34,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:34,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:34,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390738432] [2025-02-08 08:43:34,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390738432] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:34,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511602680] [2025-02-08 08:43:34,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:34,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:34,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:34,993 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 08:43:34,994 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 08:43:35,044 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:43:35,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:43:35,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:35,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:35,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:43:35,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:35,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511602680] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:35,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:35,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-08 08:43:35,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763539294] [2025-02-08 08:43:35,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:35,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:43:35,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:35,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:43:35,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:43:35,239 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:35,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 399 flow. Second operand has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:35,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:35,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:35,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:36,038 INFO L124 PetriNetUnfolderBase]: 6763/10142 cut-off events. [2025-02-08 08:43:36,038 INFO L125 PetriNetUnfolderBase]: For 9381/9542 co-relation queries the response was YES. [2025-02-08 08:43:36,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28959 conditions, 10142 events. 6763/10142 cut-off events. For 9381/9542 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 58705 event pairs, 3821 based on Foata normal form. 186/9106 useless extension candidates. Maximal degree in co-relation 16337. Up to 5392 conditions per place. [2025-02-08 08:43:36,086 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 134 selfloop transitions, 24 changer transitions 0/164 dead transitions. [2025-02-08 08:43:36,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 164 transitions, 1069 flow [2025-02-08 08:43:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:43:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:43:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2025-02-08 08:43:36,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-02-08 08:43:36,088 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 399 flow. Second operand 10 states and 270 transitions. [2025-02-08 08:43:36,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 164 transitions, 1069 flow [2025-02-08 08:43:36,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 164 transitions, 1033 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-02-08 08:43:36,099 INFO L231 Difference]: Finished difference. Result has 97 places, 76 transitions, 472 flow [2025-02-08 08:43:36,099 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=472, PETRI_PLACES=97, PETRI_TRANSITIONS=76} [2025-02-08 08:43:36,100 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2025-02-08 08:43:36,100 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 76 transitions, 472 flow [2025-02-08 08:43:36,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:36,100 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:36,100 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:36,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 08:43:36,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:36,301 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:36,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:36,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1242445703, now seen corresponding path program 1 times [2025-02-08 08:43:36,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:36,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50346944] [2025-02-08 08:43:36,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:36,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:36,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:43:36,312 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:43:36,312 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:36,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:36,343 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 08:43:36,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:36,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50346944] [2025-02-08 08:43:36,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50346944] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:36,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:36,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286971367] [2025-02-08 08:43:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:36,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:36,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:36,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:36,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-08 08:43:36,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 76 transitions, 472 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 08:43:36,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:36,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-08 08:43:36,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:36,824 INFO L124 PetriNetUnfolderBase]: 4311/6736 cut-off events. [2025-02-08 08:43:36,825 INFO L125 PetriNetUnfolderBase]: For 13911/14416 co-relation queries the response was YES. [2025-02-08 08:43:36,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21616 conditions, 6736 events. 4311/6736 cut-off events. For 13911/14416 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 38309 event pairs, 3330 based on Foata normal form. 0/6274 useless extension candidates. Maximal degree in co-relation 11319. Up to 6152 conditions per place. [2025-02-08 08:43:36,850 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 60 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2025-02-08 08:43:36,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 74 transitions, 602 flow [2025-02-08 08:43:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2025-02-08 08:43:36,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2025-02-08 08:43:36,851 INFO L175 Difference]: Start difference. First operand has 97 places, 76 transitions, 472 flow. Second operand 4 states and 90 transitions. [2025-02-08 08:43:36,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 74 transitions, 602 flow [2025-02-08 08:43:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 74 transitions, 567 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-02-08 08:43:36,859 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 447 flow [2025-02-08 08:43:36,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=447, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2025-02-08 08:43:36,860 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2025-02-08 08:43:36,860 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 447 flow [2025-02-08 08:43:36,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 08:43:36,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:36,860 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:36,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-08 08:43:36,860 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:36,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1242445704, now seen corresponding path program 1 times [2025-02-08 08:43:36,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:36,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93213] [2025-02-08 08:43:36,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:36,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:36,866 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:43:36,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:43:36,873 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:36,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:37,001 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 08:43:37,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:37,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93213] [2025-02-08 08:43:37,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93213] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:37,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267180557] [2025-02-08 08:43:37,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:37,006 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 08:43:37,007 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 08:43:37,055 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:43:37,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:43:37,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:37,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:37,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:43:37,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:37,154 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 08:43:37,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:37,191 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 08:43:37,199 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 08:43:37,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267180557] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:37,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:37,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-02-08 08:43:37,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998702304] [2025-02-08 08:43:37,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:37,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:43:37,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:37,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:43:37,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:43:37,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-08 08:43:37,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 447 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 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 08:43:37,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:37,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-08 08:43:37,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:37,849 INFO L124 PetriNetUnfolderBase]: 4534/7085 cut-off events. [2025-02-08 08:43:37,850 INFO L125 PetriNetUnfolderBase]: For 13406/13951 co-relation queries the response was YES. [2025-02-08 08:43:37,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22445 conditions, 7085 events. 4534/7085 cut-off events. For 13406/13951 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 41356 event pairs, 1668 based on Foata normal form. 0/6709 useless extension candidates. Maximal degree in co-relation 11890. Up to 3653 conditions per place. [2025-02-08 08:43:37,885 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 107 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2025-02-08 08:43:37,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 963 flow [2025-02-08 08:43:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:43:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:43:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2025-02-08 08:43:37,886 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49874686716791977 [2025-02-08 08:43:37,886 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 447 flow. Second operand 7 states and 199 transitions. [2025-02-08 08:43:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 963 flow [2025-02-08 08:43:37,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 955 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:43:37,905 INFO L231 Difference]: Finished difference. Result has 98 places, 76 transitions, 496 flow [2025-02-08 08:43:37,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=98, PETRI_TRANSITIONS=76} [2025-02-08 08:43:37,906 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2025-02-08 08:43:37,906 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 76 transitions, 496 flow [2025-02-08 08:43:37,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 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 08:43:37,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:37,906 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:37,914 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 08:43:38,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-08 08:43:38,107 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:38,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:38,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2105311475, now seen corresponding path program 2 times [2025-02-08 08:43:38,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:38,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32547781] [2025-02-08 08:43:38,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:38,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:38,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-08 08:43:38,122 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:43:38,122 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:38,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:43:38,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:38,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32547781] [2025-02-08 08:43:38,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32547781] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:38,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571611757] [2025-02-08 08:43:38,371 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:38,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:38,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:38,373 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 08:43:38,377 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 08:43:38,435 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-08 08:43:38,467 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:43:38,467 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:38,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:38,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:43:38,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:38,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:43:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:43:38,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:43:38,553 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:43:38,554 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 11 treesize of output 11 [2025-02-08 08:43:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:43:38,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:38,782 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 52 treesize of output 48 [2025-02-08 08:43:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:43:38,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571611757] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:38,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:38,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2025-02-08 08:43:38,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759213130] [2025-02-08 08:43:38,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:38,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-08 08:43:38,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:38,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-08 08:43:38,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2025-02-08 08:43:39,281 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 57 [2025-02-08 08:43:39,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 76 transitions, 496 flow. Second operand has 21 states, 21 states have (on average 14.285714285714286) internal successors, (300), 21 states have internal predecessors, (300), 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 08:43:39,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:39,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 57 [2025-02-08 08:43:39,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:41,274 INFO L124 PetriNetUnfolderBase]: 9256/13555 cut-off events. [2025-02-08 08:43:41,274 INFO L125 PetriNetUnfolderBase]: For 23098/23478 co-relation queries the response was YES. [2025-02-08 08:43:41,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47413 conditions, 13555 events. 9256/13555 cut-off events. For 23098/23478 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 80533 event pairs, 1892 based on Foata normal form. 308/13448 useless extension candidates. Maximal degree in co-relation 33817. Up to 3149 conditions per place. [2025-02-08 08:43:41,344 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 267 selfloop transitions, 36 changer transitions 0/309 dead transitions. [2025-02-08 08:43:41,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 309 transitions, 2216 flow [2025-02-08 08:43:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 08:43:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-08 08:43:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 453 transitions. [2025-02-08 08:43:41,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4182825484764543 [2025-02-08 08:43:41,347 INFO L175 Difference]: Start difference. First operand has 98 places, 76 transitions, 496 flow. Second operand 19 states and 453 transitions. [2025-02-08 08:43:41,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 309 transitions, 2216 flow [2025-02-08 08:43:41,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 309 transitions, 2150 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:43:41,377 INFO L231 Difference]: Finished difference. Result has 113 places, 86 transitions, 643 flow [2025-02-08 08:43:41,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=643, PETRI_PLACES=113, PETRI_TRANSITIONS=86} [2025-02-08 08:43:41,378 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2025-02-08 08:43:41,378 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 86 transitions, 643 flow [2025-02-08 08:43:41,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.285714285714286) internal successors, (300), 21 states have internal predecessors, (300), 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 08:43:41,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:41,379 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:41,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 08:43:41,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:41,583 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:41,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:41,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1412340305, now seen corresponding path program 1 times [2025-02-08 08:43:41,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:41,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891511219] [2025-02-08 08:43:41,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:41,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:41,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:43:41,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:43:41,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:41,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:41,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:41,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891511219] [2025-02-08 08:43:41,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891511219] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:41,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950693172] [2025-02-08 08:43:41,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:41,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:41,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:41,667 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 08:43:41,669 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 08:43:41,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:43:41,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:43:41,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:41,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:41,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:43:41,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:41,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:43:41,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950693172] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:41,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:41,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-08 08:43:41,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535709255] [2025-02-08 08:43:41,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:41,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:43:41,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:41,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:43:41,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:43:41,920 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:41,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 86 transitions, 643 flow. Second operand has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 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 08:43:41,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:41,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:41,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:42,884 INFO L124 PetriNetUnfolderBase]: 6164/9339 cut-off events. [2025-02-08 08:43:42,885 INFO L125 PetriNetUnfolderBase]: For 32319/33199 co-relation queries the response was YES. [2025-02-08 08:43:42,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35145 conditions, 9339 events. 6164/9339 cut-off events. For 32319/33199 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 51946 event pairs, 3469 based on Foata normal form. 152/9252 useless extension candidates. Maximal degree in co-relation 26995. Up to 5278 conditions per place. [2025-02-08 08:43:42,941 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 125 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2025-02-08 08:43:42,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 157 transitions, 1350 flow [2025-02-08 08:43:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:43:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:43:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2025-02-08 08:43:42,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4368421052631579 [2025-02-08 08:43:42,942 INFO L175 Difference]: Start difference. First operand has 113 places, 86 transitions, 643 flow. Second operand 10 states and 249 transitions. [2025-02-08 08:43:42,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 157 transitions, 1350 flow [2025-02-08 08:43:42,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 157 transitions, 1295 flow, removed 8 selfloop flow, removed 10 redundant places. [2025-02-08 08:43:42,968 INFO L231 Difference]: Finished difference. Result has 115 places, 90 transitions, 698 flow [2025-02-08 08:43:42,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=698, PETRI_PLACES=115, PETRI_TRANSITIONS=90} [2025-02-08 08:43:42,968 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2025-02-08 08:43:42,968 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 90 transitions, 698 flow [2025-02-08 08:43:42,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 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 08:43:42,969 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:42,969 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] [2025-02-08 08:43:42,975 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 08:43:43,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 08:43:43,170 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:43,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 408460222, now seen corresponding path program 1 times [2025-02-08 08:43:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:43,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727311255] [2025-02-08 08:43:43,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:43,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:43:43,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:43:43,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:43,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:43,362 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 08:43:43,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727311255] [2025-02-08 08:43:43,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727311255] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:43,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:43,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:43:43,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251625454] [2025-02-08 08:43:43,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:43,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:43:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:43,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:43:43,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:43:43,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-08 08:43:43,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 90 transitions, 698 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 08:43:43,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:43,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-08 08:43:43,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:44,122 INFO L124 PetriNetUnfolderBase]: 5648/8823 cut-off events. [2025-02-08 08:43:44,122 INFO L125 PetriNetUnfolderBase]: For 33692/34292 co-relation queries the response was YES. [2025-02-08 08:43:44,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34039 conditions, 8823 events. 5648/8823 cut-off events. For 33692/34292 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 50817 event pairs, 4402 based on Foata normal form. 1/8545 useless extension candidates. Maximal degree in co-relation 24639. Up to 7881 conditions per place. [2025-02-08 08:43:44,172 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 77 selfloop transitions, 2 changer transitions 17/105 dead transitions. [2025-02-08 08:43:44,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 105 transitions, 964 flow [2025-02-08 08:43:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:43:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:43:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2025-02-08 08:43:44,174 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5043859649122807 [2025-02-08 08:43:44,174 INFO L175 Difference]: Start difference. First operand has 115 places, 90 transitions, 698 flow. Second operand 4 states and 115 transitions. [2025-02-08 08:43:44,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 105 transitions, 964 flow [2025-02-08 08:43:44,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 105 transitions, 929 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-02-08 08:43:44,199 INFO L231 Difference]: Finished difference. Result has 113 places, 88 transitions, 649 flow [2025-02-08 08:43:44,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=649, PETRI_PLACES=113, PETRI_TRANSITIONS=88} [2025-02-08 08:43:44,200 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2025-02-08 08:43:44,200 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 88 transitions, 649 flow [2025-02-08 08:43:44,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 08:43:44,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:44,200 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] [2025-02-08 08:43:44,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-08 08:43:44,200 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:44,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash -59224447, now seen corresponding path program 1 times [2025-02-08 08:43:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:44,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799856163] [2025-02-08 08:43:44,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:44,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:43:44,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:43:44,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:44,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:43:44,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:44,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799856163] [2025-02-08 08:43:44,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799856163] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:44,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:44,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:43:44,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164591141] [2025-02-08 08:43:44,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:44,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:44,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:44,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:44,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:43:44,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:44,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 88 transitions, 649 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:44,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:44,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:44,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:45,026 INFO L124 PetriNetUnfolderBase]: 8114/12621 cut-off events. [2025-02-08 08:43:45,027 INFO L125 PetriNetUnfolderBase]: For 47132/48148 co-relation queries the response was YES. [2025-02-08 08:43:45,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48247 conditions, 12621 events. 8114/12621 cut-off events. For 47132/48148 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 77276 event pairs, 2599 based on Foata normal form. 266/12634 useless extension candidates. Maximal degree in co-relation 48208. Up to 6424 conditions per place. [2025-02-08 08:43:45,104 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 182 selfloop transitions, 20 changer transitions 0/210 dead transitions. [2025-02-08 08:43:45,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 210 transitions, 2032 flow [2025-02-08 08:43:45,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:43:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:43:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2025-02-08 08:43:45,106 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5350877192982456 [2025-02-08 08:43:45,106 INFO L175 Difference]: Start difference. First operand has 113 places, 88 transitions, 649 flow. Second operand 6 states and 183 transitions. [2025-02-08 08:43:45,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 210 transitions, 2032 flow [2025-02-08 08:43:45,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 2022 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-02-08 08:43:45,146 INFO L231 Difference]: Finished difference. Result has 116 places, 100 transitions, 827 flow [2025-02-08 08:43:45,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=827, PETRI_PLACES=116, PETRI_TRANSITIONS=100} [2025-02-08 08:43:45,147 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2025-02-08 08:43:45,147 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 100 transitions, 827 flow [2025-02-08 08:43:45,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:45,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:45,147 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:45,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-08 08:43:45,148 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:45,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash -908797263, now seen corresponding path program 2 times [2025-02-08 08:43:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:45,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606298384] [2025-02-08 08:43:45,149 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:45,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:45,155 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 08:43:45,157 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 22 statements. [2025-02-08 08:43:45,158 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:43:45,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:43:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606298384] [2025-02-08 08:43:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606298384] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:45,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:43:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328120620] [2025-02-08 08:43:45,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:45,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:45,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:45,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:43:45,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:45,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 100 transitions, 827 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:45,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:45,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:45,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:46,218 INFO L124 PetriNetUnfolderBase]: 11470/17576 cut-off events. [2025-02-08 08:43:46,219 INFO L125 PetriNetUnfolderBase]: For 77279/78833 co-relation queries the response was YES. [2025-02-08 08:43:46,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69716 conditions, 17576 events. 11470/17576 cut-off events. For 77279/78833 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 108715 event pairs, 4319 based on Foata normal form. 304/17454 useless extension candidates. Maximal degree in co-relation 41262. Up to 7116 conditions per place. [2025-02-08 08:43:46,327 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 202 selfloop transitions, 16 changer transitions 0/226 dead transitions. [2025-02-08 08:43:46,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 226 transitions, 2311 flow [2025-02-08 08:43:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:43:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:43:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2025-02-08 08:43:46,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2025-02-08 08:43:46,329 INFO L175 Difference]: Start difference. First operand has 116 places, 100 transitions, 827 flow. Second operand 6 states and 180 transitions. [2025-02-08 08:43:46,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 226 transitions, 2311 flow [2025-02-08 08:43:46,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 226 transitions, 2287 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-08 08:43:46,381 INFO L231 Difference]: Finished difference. Result has 124 places, 110 transitions, 1013 flow [2025-02-08 08:43:46,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1013, PETRI_PLACES=124, PETRI_TRANSITIONS=110} [2025-02-08 08:43:46,382 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2025-02-08 08:43:46,382 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 110 transitions, 1013 flow [2025-02-08 08:43:46,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:46,382 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:46,382 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] [2025-02-08 08:43:46,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-08 08:43:46,383 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:46,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:46,383 INFO L85 PathProgramCache]: Analyzing trace with hash -465213775, now seen corresponding path program 1 times [2025-02-08 08:43:46,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:46,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457803113] [2025-02-08 08:43:46,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:46,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:46,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:43:46,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:43:46,397 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:46,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:43:46,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:46,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457803113] [2025-02-08 08:43:46,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457803113] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:46,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471468522] [2025-02-08 08:43:46,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:46,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:46,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:46,465 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 08:43:46,468 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 08:43:46,520 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:43:46,536 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:43:46,536 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:46,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:46,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:43:46,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:46,557 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 08:43:46,557 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:46,581 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 08:43:46,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471468522] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:46,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:43:46,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-08 08:43:46,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963820376] [2025-02-08 08:43:46,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:46,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:46,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:46,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:46,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:43:46,597 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-08 08:43:46,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 110 transitions, 1013 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 08:43:46,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:46,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-08 08:43:46,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:47,522 INFO L124 PetriNetUnfolderBase]: 10318/16042 cut-off events. [2025-02-08 08:43:47,522 INFO L125 PetriNetUnfolderBase]: For 79414/80829 co-relation queries the response was YES. [2025-02-08 08:43:47,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64983 conditions, 16042 events. 10318/16042 cut-off events. For 79414/80829 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 100907 event pairs, 7668 based on Foata normal form. 2/15573 useless extension candidates. Maximal degree in co-relation 50288. Up to 14488 conditions per place. [2025-02-08 08:43:47,819 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 75 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2025-02-08 08:43:47,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1050 flow [2025-02-08 08:43:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:43:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:43:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2025-02-08 08:43:47,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39649122807017545 [2025-02-08 08:43:47,820 INFO L175 Difference]: Start difference. First operand has 124 places, 110 transitions, 1013 flow. Second operand 5 states and 113 transitions. [2025-02-08 08:43:47,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1050 flow [2025-02-08 08:43:47,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 980 flow, removed 17 selfloop flow, removed 5 redundant places. [2025-02-08 08:43:47,879 INFO L231 Difference]: Finished difference. Result has 119 places, 99 transitions, 830 flow [2025-02-08 08:43:47,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=830, PETRI_PLACES=119, PETRI_TRANSITIONS=99} [2025-02-08 08:43:47,880 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2025-02-08 08:43:47,880 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 99 transitions, 830 flow [2025-02-08 08:43:47,880 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 08:43:47,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:47,880 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] [2025-02-08 08:43:47,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-08 08:43:48,081 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,SelfDestructingSolverStorable21 [2025-02-08 08:43:48,081 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:48,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:48,081 INFO L85 PathProgramCache]: Analyzing trace with hash 54555665, now seen corresponding path program 3 times [2025-02-08 08:43:48,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:48,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489106217] [2025-02-08 08:43:48,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:43:48,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:48,088 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-02-08 08:43:48,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 22 statements. [2025-02-08 08:43:48,090 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-08 08:43:48,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:43:48,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:48,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489106217] [2025-02-08 08:43:48,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489106217] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:43:48,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:43:48,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:43:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18477580] [2025-02-08 08:43:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:48,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:48,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:48,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:48,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:43:48,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:48,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 99 transitions, 830 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:48,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:48,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:48,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:49,471 INFO L124 PetriNetUnfolderBase]: 10194/15596 cut-off events. [2025-02-08 08:43:49,471 INFO L125 PetriNetUnfolderBase]: For 53317/53956 co-relation queries the response was YES. [2025-02-08 08:43:49,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57759 conditions, 15596 events. 10194/15596 cut-off events. For 53317/53956 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 92047 event pairs, 2051 based on Foata normal form. 266/15616 useless extension candidates. Maximal degree in co-relation 41818. Up to 6263 conditions per place. [2025-02-08 08:43:49,557 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 157 selfloop transitions, 27 changer transitions 0/192 dead transitions. [2025-02-08 08:43:49,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 192 transitions, 1833 flow [2025-02-08 08:43:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:43:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:43:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2025-02-08 08:43:49,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5292397660818714 [2025-02-08 08:43:49,558 INFO L175 Difference]: Start difference. First operand has 119 places, 99 transitions, 830 flow. Second operand 6 states and 181 transitions. [2025-02-08 08:43:49,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 192 transitions, 1833 flow [2025-02-08 08:43:49,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 192 transitions, 1792 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-02-08 08:43:49,615 INFO L231 Difference]: Finished difference. Result has 122 places, 101 transitions, 908 flow [2025-02-08 08:43:49,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=908, PETRI_PLACES=122, PETRI_TRANSITIONS=101} [2025-02-08 08:43:49,615 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2025-02-08 08:43:49,615 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 101 transitions, 908 flow [2025-02-08 08:43:49,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:49,615 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:49,615 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:49,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-02-08 08:43:49,616 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:49,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1054935242, now seen corresponding path program 2 times [2025-02-08 08:43:49,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:49,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235216259] [2025-02-08 08:43:49,616 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:49,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:49,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 08:43:49,630 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:43:49,631 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:49,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:43:49,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:49,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235216259] [2025-02-08 08:43:49,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235216259] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:49,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27549991] [2025-02-08 08:43:49,826 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:49,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:49,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:49,829 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 08:43:49,830 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 08:43:49,882 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 08:43:49,906 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:43:49,907 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:49,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:49,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-08 08:43:49,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:49,919 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 08:43:50,011 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2025-02-08 08:43:50,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2025-02-08 08:43:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:43:50,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:43:50,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27549991] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:50,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:50,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 20 [2025-02-08 08:43:50,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999333640] [2025-02-08 08:43:50,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:50,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:43:50,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:50,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:43:50,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:43:50,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 57 [2025-02-08 08:43:50,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 101 transitions, 908 flow. Second operand has 22 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 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 08:43:50,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:50,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 57 [2025-02-08 08:43:50,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:53,148 INFO L124 PetriNetUnfolderBase]: 10441/15845 cut-off events. [2025-02-08 08:43:53,148 INFO L125 PetriNetUnfolderBase]: For 60003/60407 co-relation queries the response was YES. [2025-02-08 08:43:53,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61301 conditions, 15845 events. 10441/15845 cut-off events. For 60003/60407 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 93018 event pairs, 1405 based on Foata normal form. 338/15871 useless extension candidates. Maximal degree in co-relation 43336. Up to 3759 conditions per place. [2025-02-08 08:43:53,303 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 201 selfloop transitions, 46 changer transitions 0/255 dead transitions. [2025-02-08 08:43:53,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 255 transitions, 2416 flow [2025-02-08 08:43:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 08:43:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-08 08:43:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 359 transitions. [2025-02-08 08:43:53,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3314866112650046 [2025-02-08 08:43:53,304 INFO L175 Difference]: Start difference. First operand has 122 places, 101 transitions, 908 flow. Second operand 19 states and 359 transitions. [2025-02-08 08:43:53,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 255 transitions, 2416 flow [2025-02-08 08:43:53,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 255 transitions, 2319 flow, removed 19 selfloop flow, removed 4 redundant places. [2025-02-08 08:43:53,419 INFO L231 Difference]: Finished difference. Result has 137 places, 114 transitions, 1134 flow [2025-02-08 08:43:53,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1134, PETRI_PLACES=137, PETRI_TRANSITIONS=114} [2025-02-08 08:43:53,420 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2025-02-08 08:43:53,420 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 114 transitions, 1134 flow [2025-02-08 08:43:53,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 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 08:43:53,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:53,420 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] [2025-02-08 08:43:53,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-08 08:43:53,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:53,621 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:53,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash -634637971, now seen corresponding path program 1 times [2025-02-08 08:43:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:53,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400766057] [2025-02-08 08:43:53,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:53,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:43:53,635 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:43:53,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:53,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:53,701 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 08:43:53,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:53,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400766057] [2025-02-08 08:43:53,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400766057] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:53,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100893667] [2025-02-08 08:43:53,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:53,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:53,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:53,704 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 08:43:53,706 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 08:43:53,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:43:53,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:43:53,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:53,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:53,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 08:43:53,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:53,813 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 08:43:53,813 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:53,843 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 08:43:53,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100893667] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:53,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:43:53,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-08 08:43:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104978910] [2025-02-08 08:43:53,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:53,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:53,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:53,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:43:53,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:53,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 114 transitions, 1134 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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 08:43:53,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:53,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:53,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:55,349 INFO L124 PetriNetUnfolderBase]: 11604/17837 cut-off events. [2025-02-08 08:43:55,349 INFO L125 PetriNetUnfolderBase]: For 74143/74426 co-relation queries the response was YES. [2025-02-08 08:43:55,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69549 conditions, 17837 events. 11604/17837 cut-off events. For 74143/74426 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 106929 event pairs, 4398 based on Foata normal form. 522/17509 useless extension candidates. Maximal degree in co-relation 51685. Up to 9530 conditions per place. [2025-02-08 08:43:55,481 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 154 selfloop transitions, 12 changer transitions 0/174 dead transitions. [2025-02-08 08:43:55,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 174 transitions, 2172 flow [2025-02-08 08:43:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:43:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:43:55,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2025-02-08 08:43:55,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2025-02-08 08:43:55,482 INFO L175 Difference]: Start difference. First operand has 137 places, 114 transitions, 1134 flow. Second operand 5 states and 126 transitions. [2025-02-08 08:43:55,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 174 transitions, 2172 flow [2025-02-08 08:43:55,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 174 transitions, 2131 flow, removed 7 selfloop flow, removed 10 redundant places. [2025-02-08 08:43:55,543 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 1114 flow [2025-02-08 08:43:55,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1114, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2025-02-08 08:43:55,544 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2025-02-08 08:43:55,544 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 1114 flow [2025-02-08 08:43:55,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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 08:43:55,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:55,544 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:55,550 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 08:43:55,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:55,745 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:55,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1656746331, now seen corresponding path program 1 times [2025-02-08 08:43:55,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:55,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855288880] [2025-02-08 08:43:55,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:55,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:55,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:43:55,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:43:55,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:55,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:43:55,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:55,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855288880] [2025-02-08 08:43:55,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855288880] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:55,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074182665] [2025-02-08 08:43:55,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:55,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:55,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:55,947 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 08:43:55,950 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 08:43:56,008 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:43:56,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:43:56,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:56,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:56,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:43:56,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:43:56,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:56,262 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 08:43:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:43:56,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074182665] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:43:56,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:43:56,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-02-08 08:43:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329937671] [2025-02-08 08:43:56,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:43:56,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:43:56,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:56,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:43:56,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:43:56,549 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:56,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 1114 flow. Second operand has 22 states, 22 states have (on average 16.772727272727273) internal successors, (369), 22 states have internal predecessors, (369), 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 08:43:56,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:56,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:56,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:57,981 INFO L124 PetriNetUnfolderBase]: 8920/13938 cut-off events. [2025-02-08 08:43:57,981 INFO L125 PetriNetUnfolderBase]: For 69037/69413 co-relation queries the response was YES. [2025-02-08 08:43:58,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53898 conditions, 13938 events. 8920/13938 cut-off events. For 69037/69413 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 83444 event pairs, 3199 based on Foata normal form. 523/13941 useless extension candidates. Maximal degree in co-relation 38945. Up to 4121 conditions per place. [2025-02-08 08:43:58,092 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 146 selfloop transitions, 25 changer transitions 16/196 dead transitions. [2025-02-08 08:43:58,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 196 transitions, 1914 flow [2025-02-08 08:43:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-08 08:43:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-08 08:43:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 328 transitions. [2025-02-08 08:43:58,094 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2025-02-08 08:43:58,094 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 1114 flow. Second operand 14 states and 328 transitions. [2025-02-08 08:43:58,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 196 transitions, 1914 flow [2025-02-08 08:43:58,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 196 transitions, 1843 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-08 08:43:58,165 INFO L231 Difference]: Finished difference. Result has 143 places, 96 transitions, 861 flow [2025-02-08 08:43:58,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=861, PETRI_PLACES=143, PETRI_TRANSITIONS=96} [2025-02-08 08:43:58,166 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2025-02-08 08:43:58,166 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 96 transitions, 861 flow [2025-02-08 08:43:58,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.772727272727273) internal successors, (369), 22 states have internal predecessors, (369), 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 08:43:58,166 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:58,166 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, 1, 1] [2025-02-08 08:43:58,172 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 08:43:58,367 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,SelfDestructingSolverStorable25 [2025-02-08 08:43:58,367 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:58,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:58,367 INFO L85 PathProgramCache]: Analyzing trace with hash 977151947, now seen corresponding path program 1 times [2025-02-08 08:43:58,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:58,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752309471] [2025-02-08 08:43:58,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:58,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:58,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 08:43:58,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:43:58,377 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:58,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:58,433 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 08:43:58,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:43:58,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752309471] [2025-02-08 08:43:58,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752309471] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:58,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473498904] [2025-02-08 08:43:58,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:43:58,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:43:58,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:43:58,436 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 08:43:58,439 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 08:43:58,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 08:43:58,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:43:58,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:43:58,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:43:58,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 08:43:58,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:43:58,559 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 08:43:58,560 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:43:58,598 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 08:43:58,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473498904] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:43:58,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:43:58,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-08 08:43:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156101657] [2025-02-08 08:43:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:43:58,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:43:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:43:58,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:43:58,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:43:58,612 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:43:58,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 96 transitions, 861 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:58,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:43:58,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:43:58,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:43:59,600 INFO L124 PetriNetUnfolderBase]: 7876/12094 cut-off events. [2025-02-08 08:43:59,600 INFO L125 PetriNetUnfolderBase]: For 58504/58842 co-relation queries the response was YES. [2025-02-08 08:43:59,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46903 conditions, 12094 events. 7876/12094 cut-off events. For 58504/58842 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 70077 event pairs, 2072 based on Foata normal form. 65/11650 useless extension candidates. Maximal degree in co-relation 39511. Up to 8159 conditions per place. [2025-02-08 08:43:59,692 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 90 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2025-02-08 08:43:59,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 117 transitions, 1173 flow [2025-02-08 08:43:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:43:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:43:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2025-02-08 08:43:59,693 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4280701754385965 [2025-02-08 08:43:59,693 INFO L175 Difference]: Start difference. First operand has 143 places, 96 transitions, 861 flow. Second operand 5 states and 122 transitions. [2025-02-08 08:43:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 117 transitions, 1173 flow [2025-02-08 08:43:59,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 117 transitions, 1074 flow, removed 10 selfloop flow, removed 20 redundant places. [2025-02-08 08:43:59,743 INFO L231 Difference]: Finished difference. Result has 128 places, 94 transitions, 782 flow [2025-02-08 08:43:59,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=782, PETRI_PLACES=128, PETRI_TRANSITIONS=94} [2025-02-08 08:43:59,743 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2025-02-08 08:43:59,743 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 94 transitions, 782 flow [2025-02-08 08:43:59,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:43:59,743 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:43:59,744 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:43:59,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-08 08:43:59,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-08 08:43:59,944 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:43:59,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:43:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash -656334443, now seen corresponding path program 2 times [2025-02-08 08:43:59,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:43:59,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122606495] [2025-02-08 08:43:59,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:43:59,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:43:59,951 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-08 08:43:59,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 08:43:59,964 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:43:59,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:44:00,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:00,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122606495] [2025-02-08 08:44:00,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122606495] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:00,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657851377] [2025-02-08 08:44:00,068 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:00,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:00,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:00,070 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 08:44:00,073 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 08:44:00,128 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-08 08:44:00,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 08:44:00,159 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:44:00,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:00,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:44:00,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:44:00,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:44:00,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657851377] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:00,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:00,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-02-08 08:44:00,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137187287] [2025-02-08 08:44:00,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:00,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-08 08:44:00,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:00,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-08 08:44:00,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-02-08 08:44:00,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:44:00,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 94 transitions, 782 flow. Second operand has 19 states, 19 states have (on average 16.94736842105263) internal successors, (322), 19 states have internal predecessors, (322), 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 08:44:00,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:00,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:44:00,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:01,867 INFO L124 PetriNetUnfolderBase]: 11911/18449 cut-off events. [2025-02-08 08:44:01,867 INFO L125 PetriNetUnfolderBase]: For 85929/86479 co-relation queries the response was YES. [2025-02-08 08:44:01,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71094 conditions, 18449 events. 11911/18449 cut-off events. For 85929/86479 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 113779 event pairs, 6210 based on Foata normal form. 203/18222 useless extension candidates. Maximal degree in co-relation 44059. Up to 9499 conditions per place. [2025-02-08 08:44:02,025 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 169 selfloop transitions, 40 changer transitions 0/218 dead transitions. [2025-02-08 08:44:02,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 218 transitions, 2054 flow [2025-02-08 08:44:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-08 08:44:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-08 08:44:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 357 transitions. [2025-02-08 08:44:02,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39144736842105265 [2025-02-08 08:44:02,027 INFO L175 Difference]: Start difference. First operand has 128 places, 94 transitions, 782 flow. Second operand 16 states and 357 transitions. [2025-02-08 08:44:02,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 218 transitions, 2054 flow [2025-02-08 08:44:02,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 218 transitions, 2015 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-02-08 08:44:02,123 INFO L231 Difference]: Finished difference. Result has 145 places, 116 transitions, 1163 flow [2025-02-08 08:44:02,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1163, PETRI_PLACES=145, PETRI_TRANSITIONS=116} [2025-02-08 08:44:02,124 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2025-02-08 08:44:02,124 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 116 transitions, 1163 flow [2025-02-08 08:44:02,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.94736842105263) internal successors, (322), 19 states have internal predecessors, (322), 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 08:44:02,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:02,124 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:02,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-08 08:44:02,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-08 08:44:02,325 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:44:02,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 841458384, now seen corresponding path program 1 times [2025-02-08 08:44:02,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:02,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579620282] [2025-02-08 08:44:02,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:02,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:02,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 08:44:02,336 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:44:02,336 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:02,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:44:02,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579620282] [2025-02-08 08:44:02,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579620282] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:02,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329192552] [2025-02-08 08:44:02,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:02,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:02,439 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 08:44:02,442 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 08:44:02,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 08:44:02,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:44:02,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:02,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:02,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:44:02,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:44:02,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:02,682 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 29 treesize of output 25 [2025-02-08 08:44:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:44:02,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329192552] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:44:02,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:44:02,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-08 08:44:02,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009783160] [2025-02-08 08:44:02,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:44:02,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:44:02,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:02,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:44:02,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:44:02,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-08 08:44:02,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 116 transitions, 1163 flow. Second operand has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 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 08:44:02,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:02,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-08 08:44:02,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:06,217 INFO L124 PetriNetUnfolderBase]: 24543/38259 cut-off events. [2025-02-08 08:44:06,217 INFO L125 PetriNetUnfolderBase]: For 186845/188483 co-relation queries the response was YES. [2025-02-08 08:44:06,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148077 conditions, 38259 events. 24543/38259 cut-off events. For 186845/188483 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 266611 event pairs, 3202 based on Foata normal form. 70/37278 useless extension candidates. Maximal degree in co-relation 96094. Up to 5250 conditions per place. [2025-02-08 08:44:06,608 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 434 selfloop transitions, 83 changer transitions 0/530 dead transitions. [2025-02-08 08:44:06,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 530 transitions, 5079 flow [2025-02-08 08:44:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-08 08:44:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-02-08 08:44:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 661 transitions. [2025-02-08 08:44:06,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5041952707856598 [2025-02-08 08:44:06,609 INFO L175 Difference]: Start difference. First operand has 145 places, 116 transitions, 1163 flow. Second operand 23 states and 661 transitions. [2025-02-08 08:44:06,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 530 transitions, 5079 flow [2025-02-08 08:44:06,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 530 transitions, 5073 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-02-08 08:44:06,985 INFO L231 Difference]: Finished difference. Result has 185 places, 190 transitions, 2265 flow [2025-02-08 08:44:06,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2265, PETRI_PLACES=185, PETRI_TRANSITIONS=190} [2025-02-08 08:44:06,986 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2025-02-08 08:44:06,986 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 190 transitions, 2265 flow [2025-02-08 08:44:06,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 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 08:44:06,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:06,986 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:06,992 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 08:44:07,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-08 08:44:07,187 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:44:07,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1466637196, now seen corresponding path program 2 times [2025-02-08 08:44:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:07,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885093476] [2025-02-08 08:44:07,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:44:07,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:07,192 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-08 08:44:07,194 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 32 statements. [2025-02-08 08:44:07,194 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:44:07,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-08 08:44:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:07,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885093476] [2025-02-08 08:44:07,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885093476] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:07,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:07,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:44:07,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003581508] [2025-02-08 08:44:07,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:07,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:44:07,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:07,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:44:07,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:44:07,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-08 08:44:07,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 190 transitions, 2265 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:07,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:07,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-08 08:44:07,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:13,699 INFO L124 PetriNetUnfolderBase]: 38160/56528 cut-off events. [2025-02-08 08:44:13,700 INFO L125 PetriNetUnfolderBase]: For 528843/530721 co-relation queries the response was YES. [2025-02-08 08:44:14,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270668 conditions, 56528 events. 38160/56528 cut-off events. For 528843/530721 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 378189 event pairs, 10950 based on Foata normal form. 155/56515 useless extension candidates. Maximal degree in co-relation 232772. Up to 25208 conditions per place. [2025-02-08 08:44:14,488 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 260 selfloop transitions, 104 changer transitions 0/375 dead transitions. [2025-02-08 08:44:14,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 375 transitions, 4705 flow [2025-02-08 08:44:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:44:14,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:44:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2025-02-08 08:44:14,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4543859649122807 [2025-02-08 08:44:14,489 INFO L175 Difference]: Start difference. First operand has 185 places, 190 transitions, 2265 flow. Second operand 10 states and 259 transitions. [2025-02-08 08:44:14,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 375 transitions, 4705 flow [2025-02-08 08:44:15,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 375 transitions, 4634 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-02-08 08:44:15,962 INFO L231 Difference]: Finished difference. Result has 196 places, 238 transitions, 3295 flow [2025-02-08 08:44:15,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3295, PETRI_PLACES=196, PETRI_TRANSITIONS=238} [2025-02-08 08:44:15,962 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 139 predicate places. [2025-02-08 08:44:15,962 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 238 transitions, 3295 flow [2025-02-08 08:44:15,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:15,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:15,962 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:15,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-02-08 08:44:15,963 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:44:15,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1381732846, now seen corresponding path program 3 times [2025-02-08 08:44:15,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:15,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645860624] [2025-02-08 08:44:15,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:44:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:15,968 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 4 equivalence classes. [2025-02-08 08:44:15,970 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 32 statements. [2025-02-08 08:44:15,970 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-08 08:44:15,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-08 08:44:16,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:16,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645860624] [2025-02-08 08:44:16,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645860624] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:44:16,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:44:16,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:44:16,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073162140] [2025-02-08 08:44:16,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:16,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:44:16,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:16,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:44:16,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:44:16,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-08 08:44:16,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 238 transitions, 3295 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:16,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:16,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-08 08:44:16,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:23,859 INFO L124 PetriNetUnfolderBase]: 40732/60143 cut-off events. [2025-02-08 08:44:23,860 INFO L125 PetriNetUnfolderBase]: For 675423/677217 co-relation queries the response was YES. [2025-02-08 08:44:24,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304808 conditions, 60143 events. 40732/60143 cut-off events. For 675423/677217 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 405150 event pairs, 2720 based on Foata normal form. 258/60357 useless extension candidates. Maximal degree in co-relation 273629. Up to 21588 conditions per place. [2025-02-08 08:44:24,597 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 264 selfloop transitions, 137 changer transitions 0/412 dead transitions. [2025-02-08 08:44:24,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 412 transitions, 5719 flow [2025-02-08 08:44:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:44:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 08:44:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2025-02-08 08:44:24,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4370015948963317 [2025-02-08 08:44:24,599 INFO L175 Difference]: Start difference. First operand has 196 places, 238 transitions, 3295 flow. Second operand 11 states and 274 transitions. [2025-02-08 08:44:24,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 412 transitions, 5719 flow [2025-02-08 08:44:28,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 412 transitions, 5590 flow, removed 61 selfloop flow, removed 2 redundant places. [2025-02-08 08:44:28,126 INFO L231 Difference]: Finished difference. Result has 208 places, 274 transitions, 4291 flow [2025-02-08 08:44:28,126 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4291, PETRI_PLACES=208, PETRI_TRANSITIONS=274} [2025-02-08 08:44:28,126 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 151 predicate places. [2025-02-08 08:44:28,126 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 274 transitions, 4291 flow [2025-02-08 08:44:28,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:28,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:44:28,127 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:44:28,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-02-08 08:44:28,127 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-08 08:44:28,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:44:28,127 INFO L85 PathProgramCache]: Analyzing trace with hash -97982255, now seen corresponding path program 1 times [2025-02-08 08:44:28,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:44:28,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509019059] [2025-02-08 08:44:28,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:28,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:44:28,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-08 08:44:28,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 08:44:28,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:28,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:28,203 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 08:44:28,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:44:28,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509019059] [2025-02-08 08:44:28,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509019059] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:28,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207849490] [2025-02-08 08:44:28,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:44:28,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:44:28,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:44:28,205 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 08:44:28,206 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 08:44:28,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-08 08:44:28,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 08:44:28,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:44:28,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:44:28,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 08:44:28,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:44:28,379 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 08:44:28,379 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:44:28,420 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 08:44:28,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207849490] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:44:28,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:44:28,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-08 08:44:28,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802540202] [2025-02-08 08:44:28,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:44:28,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:44:28,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:44:28,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:44:28,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:44:28,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-08 08:44:28,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 274 transitions, 4291 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:44:28,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:44:28,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-08 08:44:28,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:44:35,946 INFO L124 PetriNetUnfolderBase]: 37266/57174 cut-off events. [2025-02-08 08:44:35,946 INFO L125 PetriNetUnfolderBase]: For 742465/744641 co-relation queries the response was YES. [2025-02-08 08:44:36,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301473 conditions, 57174 events. 37266/57174 cut-off events. For 742465/744641 co-relation queries the response was YES. Maximal size of possible extension queue 1225. Compared 410027 event pairs, 8844 based on Foata normal form. 1/56124 useless extension candidates. Maximal degree in co-relation 269805. Up to 40372 conditions per place. [2025-02-08 08:44:36,977 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 233 selfloop transitions, 47 changer transitions 24/320 dead transitions. [2025-02-08 08:44:36,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 320 transitions, 5499 flow [2025-02-08 08:44:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:44:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:44:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2025-02-08 08:44:36,978 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4280701754385965 [2025-02-08 08:44:36,978 INFO L175 Difference]: Start difference. First operand has 208 places, 274 transitions, 4291 flow. Second operand 5 states and 122 transitions. [2025-02-08 08:44:36,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 320 transitions, 5499 flow