./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-subst.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/chl-word-subst.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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:36:13,944 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:36:14,022 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:36:14,026 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:36:14,027 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:36:14,051 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:36:14,053 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:36:14,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:36:14,054 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:36:14,054 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:36:14,055 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:36:14,055 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:36:14,055 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:36:14,055 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:36:14,056 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:36:14,056 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:36:14,056 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:36:14,057 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:36:14,057 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:36:14,057 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:36:14,057 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:36:14,057 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:36:14,057 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:36:14,057 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:36:14,057 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:36:14,057 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:36:14,058 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:36:14,058 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:36:14,058 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:36:14,059 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:36:14,059 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:36:14,059 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 -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2025-02-08 08:36:14,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:36:14,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:36:14,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:36:14,352 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:36:14,352 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:36:14,354 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2025-02-08 08:36:15,658 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/02ba4b7a2/5ea5ca9ec986433caf5853f0cd1eb0cb/FLAG49a4a515f [2025-02-08 08:36:15,915 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:36:15,916 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2025-02-08 08:36:15,925 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/02ba4b7a2/5ea5ca9ec986433caf5853f0cd1eb0cb/FLAG49a4a515f [2025-02-08 08:36:15,940 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/02ba4b7a2/5ea5ca9ec986433caf5853f0cd1eb0cb [2025-02-08 08:36:15,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:36:15,943 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:36:15,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:36:15,944 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:36:15,947 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:36:15,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:36:15" (1/1) ... [2025-02-08 08:36:15,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9fcaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:15, skipping insertion in model container [2025-02-08 08:36:15,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:36:15" (1/1) ... [2025-02-08 08:36:15,968 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:36:16,125 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 08:36:16,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:36:16,142 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:36:16,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:36:16,193 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:36:16,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16 WrapperNode [2025-02-08 08:36:16,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:36:16,195 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:36:16,195 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:36:16,195 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:36:16,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,241 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 162 [2025-02-08 08:36:16,246 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:36:16,246 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:36:16,246 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:36:16,247 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:36:16,255 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,260 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,291 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 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 08:36:16,291 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,292 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,302 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,315 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:36:16,319 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:36:16,319 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:36:16,319 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:36:16,320 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (1/1) ... [2025-02-08 08:36:16,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:36:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:16,358 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 08:36:16,362 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 08:36:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:36:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:36:16,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:36:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:36:16,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:36:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:36:16,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:36:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:36:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:36:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:36:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:36:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:36:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:36:16,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:36:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:36:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:36:16,394 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 08:36:16,516 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:36:16,518 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:36:17,033 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:36:17,033 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:36:17,315 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:36:17,315 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:36:17,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:36:17 BoogieIcfgContainer [2025-02-08 08:36:17,316 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:36:17,318 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:36:17,318 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:36:17,322 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:36:17,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:36:15" (1/3) ... [2025-02-08 08:36:17,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de9b9fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:36:17, skipping insertion in model container [2025-02-08 08:36:17,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:16" (2/3) ... [2025-02-08 08:36:17,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de9b9fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:36:17, skipping insertion in model container [2025-02-08 08:36:17,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:36:17" (3/3) ... [2025-02-08 08:36:17,325 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2025-02-08 08:36:17,339 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:36:17,341 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-word-subst.wvr.c that has 4 procedures, 85 locations, 1 initial locations, 6 loop locations, and 32 error locations. [2025-02-08 08:36:17,341 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:36:17,416 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:36:17,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 96 transitions, 213 flow [2025-02-08 08:36:17,502 INFO L124 PetriNetUnfolderBase]: 12/93 cut-off events. [2025-02-08 08:36:17,505 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:36:17,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 12/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 305 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2025-02-08 08:36:17,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 96 transitions, 213 flow [2025-02-08 08:36:17,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 92 transitions, 202 flow [2025-02-08 08:36:17,525 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:36:17,540 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;@5e8cfc37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:36:17,540 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2025-02-08 08:36:17,545 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:36:17,545 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:36:17,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:36:17,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:17,546 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:36:17,546 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:17,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash 680425, now seen corresponding path program 1 times [2025-02-08 08:36:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:17,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561507911] [2025-02-08 08:36:17,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:17,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:17,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:36:17,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:36:17,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:17,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:17,789 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 08:36:17,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:17,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561507911] [2025-02-08 08:36:17,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561507911] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:17,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:17,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:36:17,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905988140] [2025-02-08 08:36:17,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:17,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:36:17,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:17,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:36:17,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:36:17,896 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 96 [2025-02-08 08:36:17,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:36:17,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:17,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 96 [2025-02-08 08:36:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:18,625 INFO L124 PetriNetUnfolderBase]: 2426/4409 cut-off events. [2025-02-08 08:36:18,626 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2025-02-08 08:36:18,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7761 conditions, 4409 events. 2426/4409 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29884 event pairs, 1460 based on Foata normal form. 1/2907 useless extension candidates. Maximal degree in co-relation 7303. Up to 3188 conditions per place. [2025-02-08 08:36:18,676 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 42 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2025-02-08 08:36:18,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 280 flow [2025-02-08 08:36:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:36:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:36:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2025-02-08 08:36:18,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65625 [2025-02-08 08:36:18,695 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 202 flow. Second operand 3 states and 189 transitions. [2025-02-08 08:36:18,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 280 flow [2025-02-08 08:36:18,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 268 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:36:18,708 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 184 flow [2025-02-08 08:36:18,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2025-02-08 08:36:18,715 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2025-02-08 08:36:18,716 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 184 flow [2025-02-08 08:36:18,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:36:18,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:18,717 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:36:18,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:36:18,717 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:18,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash 680426, now seen corresponding path program 1 times [2025-02-08 08:36:18,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:18,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399393467] [2025-02-08 08:36:18,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:18,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:18,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:36:18,764 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:36:18,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:18,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:19,081 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 08:36:19,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:19,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399393467] [2025-02-08 08:36:19,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399393467] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:19,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:19,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:36:19,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908744898] [2025-02-08 08:36:19,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:19,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:36:19,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:19,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:36:19,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:36:19,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 96 [2025-02-08 08:36:19,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 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 08:36:19,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:19,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 96 [2025-02-08 08:36:19,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:19,784 INFO L124 PetriNetUnfolderBase]: 2427/4412 cut-off events. [2025-02-08 08:36:19,785 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-02-08 08:36:19,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7669 conditions, 4412 events. 2427/4412 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29871 event pairs, 1460 based on Foata normal form. 0/2906 useless extension candidates. Maximal degree in co-relation 7632. Up to 3201 conditions per place. [2025-02-08 08:36:19,832 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 46 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2025-02-08 08:36:19,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 290 flow [2025-02-08 08:36:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:36:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:36:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 239 transitions. [2025-02-08 08:36:19,836 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6223958333333334 [2025-02-08 08:36:19,836 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 184 flow. Second operand 4 states and 239 transitions. [2025-02-08 08:36:19,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 290 flow [2025-02-08 08:36:19,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:36:19,841 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 207 flow [2025-02-08 08:36:19,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2025-02-08 08:36:19,842 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2025-02-08 08:36:19,842 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 207 flow [2025-02-08 08:36:19,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 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 08:36:19,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:19,842 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:36:19,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:36:19,843 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:19,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash 21095217, now seen corresponding path program 1 times [2025-02-08 08:36:19,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:19,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001300950] [2025-02-08 08:36:19,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:19,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:19,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:36:19,871 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:36:19,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:19,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:20,163 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 08:36:20,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:20,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001300950] [2025-02-08 08:36:20,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001300950] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:20,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:20,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:36:20,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982606795] [2025-02-08 08:36:20,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:20,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:36:20,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:20,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:36:20,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:36:20,321 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 96 [2025-02-08 08:36:20,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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 08:36:20,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:20,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 96 [2025-02-08 08:36:20,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:20,812 INFO L124 PetriNetUnfolderBase]: 2428/4415 cut-off events. [2025-02-08 08:36:20,812 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-02-08 08:36:20,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7686 conditions, 4415 events. 2428/4415 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29860 event pairs, 1460 based on Foata normal form. 0/2908 useless extension candidates. Maximal degree in co-relation 7661. Up to 3200 conditions per place. [2025-02-08 08:36:20,850 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 46 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2025-02-08 08:36:20,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 319 flow [2025-02-08 08:36:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:36:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:36:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 289 transitions. [2025-02-08 08:36:20,855 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6020833333333333 [2025-02-08 08:36:20,855 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 207 flow. Second operand 5 states and 289 transitions. [2025-02-08 08:36:20,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 319 flow [2025-02-08 08:36:20,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:36:20,857 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 241 flow [2025-02-08 08:36:20,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2025-02-08 08:36:20,860 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -1 predicate places. [2025-02-08 08:36:20,860 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 241 flow [2025-02-08 08:36:20,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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 08:36:20,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:20,861 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-08 08:36:20,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:36:20,861 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:20,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:20,861 INFO L85 PathProgramCache]: Analyzing trace with hash 653953649, now seen corresponding path program 1 times [2025-02-08 08:36:20,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:20,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836871749] [2025-02-08 08:36:20,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:20,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:20,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:36:20,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:36:20,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:20,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:21,095 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 08:36:21,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:21,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836871749] [2025-02-08 08:36:21,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836871749] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:21,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:21,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:36:21,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626530937] [2025-02-08 08:36:21,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:21,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:36:21,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:21,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:36:21,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:36:21,284 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 96 [2025-02-08 08:36:21,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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 08:36:21,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:21,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 96 [2025-02-08 08:36:21,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:21,729 INFO L124 PetriNetUnfolderBase]: 2429/4418 cut-off events. [2025-02-08 08:36:21,729 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2025-02-08 08:36:21,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7708 conditions, 4418 events. 2429/4418 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 29896 event pairs, 1460 based on Foata normal form. 0/2912 useless extension candidates. Maximal degree in co-relation 7677. Up to 3203 conditions per place. [2025-02-08 08:36:21,755 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 47 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2025-02-08 08:36:21,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 359 flow [2025-02-08 08:36:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:36:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:36:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 289 transitions. [2025-02-08 08:36:21,757 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6020833333333333 [2025-02-08 08:36:21,758 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 241 flow. Second operand 5 states and 289 transitions. [2025-02-08 08:36:21,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 359 flow [2025-02-08 08:36:21,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:36:21,762 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 283 flow [2025-02-08 08:36:21,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2025-02-08 08:36:21,764 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2025-02-08 08:36:21,764 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 283 flow [2025-02-08 08:36:21,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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 08:36:21,764 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:21,764 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:36:21,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:36:21,764 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:21,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 653909605, now seen corresponding path program 1 times [2025-02-08 08:36:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:21,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080759684] [2025-02-08 08:36:21,765 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:21,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:36:21,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:36:21,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:21,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:22,004 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 08:36:22,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:22,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080759684] [2025-02-08 08:36:22,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080759684] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:22,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053704491] [2025-02-08 08:36:22,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:22,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:22,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:22,007 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 08:36:22,010 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 08:36:22,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:36:22,071 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:36:22,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:22,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:22,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:36:22,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:22,145 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 08:36:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:36:22,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:22,395 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 08:36:22,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053704491] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:22,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:22,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:36:22,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583530536] [2025-02-08 08:36:22,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:22,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:36:22,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:22,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:36:22,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:36:22,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 96 [2025-02-08 08:36:22,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 283 flow. Second operand has 11 states, 11 states have (on average 48.36363636363637) internal successors, (532), 11 states have internal predecessors, (532), 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 08:36:22,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:22,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 96 [2025-02-08 08:36:22,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:23,456 INFO L124 PetriNetUnfolderBase]: 2429/4417 cut-off events. [2025-02-08 08:36:23,457 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-08 08:36:23,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7726 conditions, 4417 events. 2429/4417 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 29874 event pairs, 1460 based on Foata normal form. 0/2914 useless extension candidates. Maximal degree in co-relation 7692. Up to 3203 conditions per place. [2025-02-08 08:36:23,484 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 48 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2025-02-08 08:36:23,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 389 flow [2025-02-08 08:36:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:36:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:36:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 332 transitions. [2025-02-08 08:36:23,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2025-02-08 08:36:23,486 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 283 flow. Second operand 6 states and 332 transitions. [2025-02-08 08:36:23,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 389 flow [2025-02-08 08:36:23,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:36:23,488 INFO L231 Difference]: Finished difference. Result has 96 places, 95 transitions, 286 flow [2025-02-08 08:36:23,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=96, PETRI_TRANSITIONS=95} [2025-02-08 08:36:23,489 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2025-02-08 08:36:23,489 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 286 flow [2025-02-08 08:36:23,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 48.36363636363637) internal successors, (532), 11 states have internal predecessors, (532), 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 08:36:23,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:23,490 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:36:23,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-08 08:36:23,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:23,694 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:23,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1202312456, now seen corresponding path program 1 times [2025-02-08 08:36:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:23,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729287909] [2025-02-08 08:36:23,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:23,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:36:23,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:36:23,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:23,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:23,942 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 08:36:23,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:23,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729287909] [2025-02-08 08:36:23,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729287909] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:23,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311802368] [2025-02-08 08:36:23,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:23,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:23,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:23,945 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 08:36:23,948 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 08:36:23,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:36:24,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:36:24,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:24,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:24,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:36:24,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:24,033 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 08:36:24,217 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 08:36:24,218 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:24,361 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 08:36:24,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311802368] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:24,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:24,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:36:24,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134466417] [2025-02-08 08:36:24,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:24,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:36:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:24,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:36:24,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:36:25,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2025-02-08 08:36:25,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 47.30769230769231) internal successors, (615), 13 states have internal predecessors, (615), 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 08:36:25,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:25,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2025-02-08 08:36:25,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:26,749 INFO L124 PetriNetUnfolderBase]: 2684/5179 cut-off events. [2025-02-08 08:36:26,750 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2025-02-08 08:36:26,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8849 conditions, 5179 events. 2684/5179 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 37919 event pairs, 1646 based on Foata normal form. 0/3350 useless extension candidates. Maximal degree in co-relation 8798. Up to 3533 conditions per place. [2025-02-08 08:36:26,781 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 43 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2025-02-08 08:36:26,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 439 flow [2025-02-08 08:36:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:36:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:36:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 474 transitions. [2025-02-08 08:36:26,787 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2025-02-08 08:36:26,787 INFO L175 Difference]: Start difference. First operand has 96 places, 95 transitions, 286 flow. Second operand 9 states and 474 transitions. [2025-02-08 08:36:26,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 439 flow [2025-02-08 08:36:26,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 392 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-08 08:36:26,794 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 306 flow [2025-02-08 08:36:26,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2025-02-08 08:36:26,795 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2025-02-08 08:36:26,795 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 306 flow [2025-02-08 08:36:26,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 47.30769230769231) internal successors, (615), 13 states have internal predecessors, (615), 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 08:36:26,796 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:26,796 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-02-08 08:36:26,804 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 08:36:27,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:27,001 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:27,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1384252491, now seen corresponding path program 1 times [2025-02-08 08:36:27,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:27,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547941963] [2025-02-08 08:36:27,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:27,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:27,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:36:27,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:36:27,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:27,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:27,239 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 08:36:27,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:27,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547941963] [2025-02-08 08:36:27,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547941963] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:27,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355205325] [2025-02-08 08:36:27,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:27,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:27,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:27,242 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 08:36:27,245 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 08:36:27,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:36:27,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:36:27,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:27,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:27,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:36:27,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:27,325 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 08:36:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:36:27,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:27,650 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 08:36:27,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355205325] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:27,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:27,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:36:27,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001726638] [2025-02-08 08:36:27,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:27,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:36:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:27,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:36:27,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:36:28,549 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 96 [2025-02-08 08:36:28,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 306 flow. Second operand has 13 states, 13 states have (on average 48.46153846153846) internal successors, (630), 13 states have internal predecessors, (630), 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 08:36:28,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:28,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 96 [2025-02-08 08:36:28,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:29,058 INFO L124 PetriNetUnfolderBase]: 2431/4421 cut-off events. [2025-02-08 08:36:29,058 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-02-08 08:36:29,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7738 conditions, 4421 events. 2431/4421 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 29878 event pairs, 1460 based on Foata normal form. 0/2920 useless extension candidates. Maximal degree in co-relation 7683. Up to 3197 conditions per place. [2025-02-08 08:36:29,077 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 40 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2025-02-08 08:36:29,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 99 transitions, 420 flow [2025-02-08 08:36:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:36:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:36:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 380 transitions. [2025-02-08 08:36:29,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2025-02-08 08:36:29,081 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 306 flow. Second operand 7 states and 380 transitions. [2025-02-08 08:36:29,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 99 transitions, 420 flow [2025-02-08 08:36:29,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 387 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-02-08 08:36:29,085 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 307 flow [2025-02-08 08:36:29,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2025-02-08 08:36:29,087 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2025-02-08 08:36:29,087 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 307 flow [2025-02-08 08:36:29,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 48.46153846153846) internal successors, (630), 13 states have internal predecessors, (630), 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 08:36:29,089 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:29,089 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:29,097 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 08:36:29,289 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 08:36:29,290 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:29,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:29,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1057964429, now seen corresponding path program 1 times [2025-02-08 08:36:29,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:29,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248950226] [2025-02-08 08:36:29,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:29,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:29,300 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:36:29,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:36:29,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:29,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:29,385 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 08:36:29,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:29,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248950226] [2025-02-08 08:36:29,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248950226] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:29,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:29,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:36:29,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897805888] [2025-02-08 08:36:29,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:29,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:36:29,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:29,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:36:29,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:36:29,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2025-02-08 08:36:29,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 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 08:36:29,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:29,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2025-02-08 08:36:29,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:30,000 INFO L124 PetriNetUnfolderBase]: 4329/8282 cut-off events. [2025-02-08 08:36:30,001 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-02-08 08:36:30,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14232 conditions, 8282 events. 4329/8282 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 65166 event pairs, 2464 based on Foata normal form. 114/5637 useless extension candidates. Maximal degree in co-relation 8793. Up to 3546 conditions per place. [2025-02-08 08:36:30,041 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 117 selfloop transitions, 10 changer transitions 0/166 dead transitions. [2025-02-08 08:36:30,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 166 transitions, 759 flow [2025-02-08 08:36:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:36:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:36:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2025-02-08 08:36:30,043 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7065972222222222 [2025-02-08 08:36:30,043 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 307 flow. Second operand 6 states and 407 transitions. [2025-02-08 08:36:30,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 166 transitions, 759 flow [2025-02-08 08:36:30,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 166 transitions, 695 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-02-08 08:36:30,047 INFO L231 Difference]: Finished difference. Result has 97 places, 106 transitions, 344 flow [2025-02-08 08:36:30,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=344, PETRI_PLACES=97, PETRI_TRANSITIONS=106} [2025-02-08 08:36:30,050 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 7 predicate places. [2025-02-08 08:36:30,050 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 106 transitions, 344 flow [2025-02-08 08:36:30,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 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 08:36:30,050 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:30,051 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:30,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:36:30,051 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:30,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:30,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1477332306, now seen corresponding path program 1 times [2025-02-08 08:36:30,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:30,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789331946] [2025-02-08 08:36:30,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:30,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:30,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:36:30,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:36:30,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:30,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:36:30,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:30,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789331946] [2025-02-08 08:36:30,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789331946] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:30,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:30,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:36:30,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242063339] [2025-02-08 08:36:30,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:30,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:36:30,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:30,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:36:30,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:36:30,169 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2025-02-08 08:36:30,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 106 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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 08:36:30,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:30,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2025-02-08 08:36:30,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:31,110 INFO L124 PetriNetUnfolderBase]: 7588/14544 cut-off events. [2025-02-08 08:36:31,110 INFO L125 PetriNetUnfolderBase]: For 1966/1966 co-relation queries the response was YES. [2025-02-08 08:36:31,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26393 conditions, 14544 events. 7588/14544 cut-off events. For 1966/1966 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 125442 event pairs, 4318 based on Foata normal form. 114/10248 useless extension candidates. Maximal degree in co-relation 18879. Up to 5732 conditions per place. [2025-02-08 08:36:31,187 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 115 selfloop transitions, 14 changer transitions 0/168 dead transitions. [2025-02-08 08:36:31,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 168 transitions, 771 flow [2025-02-08 08:36:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:36:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:36:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 401 transitions. [2025-02-08 08:36:31,189 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6961805555555556 [2025-02-08 08:36:31,190 INFO L175 Difference]: Start difference. First operand has 97 places, 106 transitions, 344 flow. Second operand 6 states and 401 transitions. [2025-02-08 08:36:31,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 168 transitions, 771 flow [2025-02-08 08:36:31,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 168 transitions, 766 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:36:31,195 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 448 flow [2025-02-08 08:36:31,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=448, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2025-02-08 08:36:31,196 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 13 predicate places. [2025-02-08 08:36:31,196 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 448 flow [2025-02-08 08:36:31,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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 08:36:31,196 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:31,196 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:31,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:36:31,197 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:31,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash 520569776, now seen corresponding path program 1 times [2025-02-08 08:36:31,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:31,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735905508] [2025-02-08 08:36:31,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:31,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:31,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:36:31,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:36:31,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:31,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:31,279 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 08:36:31,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735905508] [2025-02-08 08:36:31,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735905508] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:31,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:31,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:36:31,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731044689] [2025-02-08 08:36:31,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:31,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:36:31,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:31,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:36:31,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:36:31,326 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2025-02-08 08:36:31,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 448 flow. Second operand has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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 08:36:31,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:31,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2025-02-08 08:36:31,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:32,223 INFO L124 PetriNetUnfolderBase]: 6629/13305 cut-off events. [2025-02-08 08:36:32,223 INFO L125 PetriNetUnfolderBase]: For 4669/4867 co-relation queries the response was YES. [2025-02-08 08:36:32,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24945 conditions, 13305 events. 6629/13305 cut-off events. For 4669/4867 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 116633 event pairs, 3968 based on Foata normal form. 174/9436 useless extension candidates. Maximal degree in co-relation 18341. Up to 5977 conditions per place. [2025-02-08 08:36:32,285 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 125 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2025-02-08 08:36:32,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 169 transitions, 877 flow [2025-02-08 08:36:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:36:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:36:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 345 transitions. [2025-02-08 08:36:32,287 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.71875 [2025-02-08 08:36:32,287 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 448 flow. Second operand 5 states and 345 transitions. [2025-02-08 08:36:32,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 169 transitions, 877 flow [2025-02-08 08:36:32,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 169 transitions, 872 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:36:32,294 INFO L231 Difference]: Finished difference. Result has 108 places, 116 transitions, 468 flow [2025-02-08 08:36:32,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=468, PETRI_PLACES=108, PETRI_TRANSITIONS=116} [2025-02-08 08:36:32,295 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 18 predicate places. [2025-02-08 08:36:32,295 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 116 transitions, 468 flow [2025-02-08 08:36:32,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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 08:36:32,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:32,295 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:32,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 08:36:32,296 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:32,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash 174404064, now seen corresponding path program 1 times [2025-02-08 08:36:32,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:32,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628975189] [2025-02-08 08:36:32,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:32,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:32,302 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:36:32,306 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:36:32,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:32,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:36:32,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:32,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628975189] [2025-02-08 08:36:32,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628975189] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:32,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:32,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:36:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694452761] [2025-02-08 08:36:32,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:32,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:36:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:32,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:36:32,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:36:32,432 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2025-02-08 08:36:32,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 468 flow. Second operand has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 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 08:36:32,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:32,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2025-02-08 08:36:32,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:33,283 INFO L124 PetriNetUnfolderBase]: 5778/10951 cut-off events. [2025-02-08 08:36:33,283 INFO L125 PetriNetUnfolderBase]: For 5375/5634 co-relation queries the response was YES. [2025-02-08 08:36:33,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22444 conditions, 10951 events. 5778/10951 cut-off events. For 5375/5634 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 87033 event pairs, 3566 based on Foata normal form. 134/8518 useless extension candidates. Maximal degree in co-relation 16095. Up to 5187 conditions per place. [2025-02-08 08:36:33,338 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 117 selfloop transitions, 12 changer transitions 0/168 dead transitions. [2025-02-08 08:36:33,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 168 transitions, 897 flow [2025-02-08 08:36:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:36:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:36:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2025-02-08 08:36:33,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6822916666666666 [2025-02-08 08:36:33,340 INFO L175 Difference]: Start difference. First operand has 108 places, 116 transitions, 468 flow. Second operand 6 states and 393 transitions. [2025-02-08 08:36:33,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 168 transitions, 897 flow [2025-02-08 08:36:33,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 168 transitions, 892 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:36:33,351 INFO L231 Difference]: Finished difference. Result has 113 places, 118 transitions, 505 flow [2025-02-08 08:36:33,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=505, PETRI_PLACES=113, PETRI_TRANSITIONS=118} [2025-02-08 08:36:33,352 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 23 predicate places. [2025-02-08 08:36:33,352 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 118 transitions, 505 flow [2025-02-08 08:36:33,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 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 08:36:33,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:33,352 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:33,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:36:33,352 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:33,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash -57013113, now seen corresponding path program 1 times [2025-02-08 08:36:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:33,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802203745] [2025-02-08 08:36:33,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:33,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:33,364 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:36:33,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:36:33,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:33,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:33,687 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 08:36:33,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:33,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802203745] [2025-02-08 08:36:33,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802203745] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716097601] [2025-02-08 08:36:33,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:33,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:33,690 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 08:36:33,692 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 08:36:33,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:36:33,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:36:33,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:33,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:33,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:36:33,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:33,788 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 08:36:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:36:33,837 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 08:36:33,864 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:36:33,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:36:33,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:36:33,913 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 08:36:33,923 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:36:33,923 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 08:36:33,981 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 08:36:33,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:34,219 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 100 treesize of output 96 [2025-02-08 08:36:34,394 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 08:36:34,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716097601] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:34,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:34,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-02-08 08:36:34,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928206086] [2025-02-08 08:36:34,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:34,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:36:34,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:34,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:36:34,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:36:35,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2025-02-08 08:36:35,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 118 transitions, 505 flow. Second operand has 16 states, 16 states have (on average 39.0625) internal successors, (625), 16 states have internal predecessors, (625), 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 08:36:35,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:35,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2025-02-08 08:36:35,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:37,010 INFO L124 PetriNetUnfolderBase]: 9755/17214 cut-off events. [2025-02-08 08:36:37,010 INFO L125 PetriNetUnfolderBase]: For 8084/8752 co-relation queries the response was YES. [2025-02-08 08:36:37,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36753 conditions, 17214 events. 9755/17214 cut-off events. For 8084/8752 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 131178 event pairs, 3959 based on Foata normal form. 0/14119 useless extension candidates. Maximal degree in co-relation 25259. Up to 5442 conditions per place. [2025-02-08 08:36:37,093 INFO L140 encePairwiseOnDemand]: 79/96 looper letters, 146 selfloop transitions, 28 changer transitions 0/204 dead transitions. [2025-02-08 08:36:37,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 204 transitions, 1104 flow [2025-02-08 08:36:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:36:37,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:36:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 497 transitions. [2025-02-08 08:36:37,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5752314814814815 [2025-02-08 08:36:37,096 INFO L175 Difference]: Start difference. First operand has 113 places, 118 transitions, 505 flow. Second operand 9 states and 497 transitions. [2025-02-08 08:36:37,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 204 transitions, 1104 flow [2025-02-08 08:36:37,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 204 transitions, 1086 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:36:37,136 INFO L231 Difference]: Finished difference. Result has 115 places, 118 transitions, 576 flow [2025-02-08 08:36:37,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=576, PETRI_PLACES=115, PETRI_TRANSITIONS=118} [2025-02-08 08:36:37,137 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 25 predicate places. [2025-02-08 08:36:37,137 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 576 flow [2025-02-08 08:36:37,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 39.0625) internal successors, (625), 16 states have internal predecessors, (625), 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 08:36:37,138 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:37,138 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:37,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 08:36:37,342 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,SelfDestructingSolverStorable11 [2025-02-08 08:36:37,342 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:37,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:37,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1234965804, now seen corresponding path program 1 times [2025-02-08 08:36:37,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:37,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844288684] [2025-02-08 08:36:37,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:37,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:37,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:36:37,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:36:37,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:37,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:36:37,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:37,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844288684] [2025-02-08 08:36:37,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844288684] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:37,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:37,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:36:37,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662790227] [2025-02-08 08:36:37,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:37,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:36:37,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:37,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:36:37,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:36:37,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2025-02-08 08:36:37,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 576 flow. Second operand has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 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 08:36:37,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:37,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2025-02-08 08:36:37,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:38,817 INFO L124 PetriNetUnfolderBase]: 11765/23133 cut-off events. [2025-02-08 08:36:38,817 INFO L125 PetriNetUnfolderBase]: For 22293/22992 co-relation queries the response was YES. [2025-02-08 08:36:38,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51663 conditions, 23133 events. 11765/23133 cut-off events. For 22293/22992 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 208927 event pairs, 7024 based on Foata normal form. 294/19203 useless extension candidates. Maximal degree in co-relation 37158. Up to 9221 conditions per place. [2025-02-08 08:36:38,930 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 141 selfloop transitions, 17 changer transitions 0/193 dead transitions. [2025-02-08 08:36:38,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 193 transitions, 1254 flow [2025-02-08 08:36:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:36:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:36:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 345 transitions. [2025-02-08 08:36:38,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.71875 [2025-02-08 08:36:38,932 INFO L175 Difference]: Start difference. First operand has 115 places, 118 transitions, 576 flow. Second operand 5 states and 345 transitions. [2025-02-08 08:36:38,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 193 transitions, 1254 flow [2025-02-08 08:36:38,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 193 transitions, 1176 flow, removed 19 selfloop flow, removed 4 redundant places. [2025-02-08 08:36:38,983 INFO L231 Difference]: Finished difference. Result has 117 places, 122 transitions, 598 flow [2025-02-08 08:36:38,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=598, PETRI_PLACES=117, PETRI_TRANSITIONS=122} [2025-02-08 08:36:38,983 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 27 predicate places. [2025-02-08 08:36:38,984 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 122 transitions, 598 flow [2025-02-08 08:36:38,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 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 08:36:38,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:38,984 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:38,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 08:36:38,984 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:38,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1767405874, now seen corresponding path program 1 times [2025-02-08 08:36:38,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:38,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911373916] [2025-02-08 08:36:38,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:38,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:36:38,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:36:38,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:38,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:39,071 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 08:36:39,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:39,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911373916] [2025-02-08 08:36:39,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911373916] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:39,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:39,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:36:39,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925952181] [2025-02-08 08:36:39,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:39,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:36:39,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:39,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:36:39,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:36:39,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 96 [2025-02-08 08:36:39,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 598 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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 08:36:39,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:39,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 96 [2025-02-08 08:36:39,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:40,707 INFO L124 PetriNetUnfolderBase]: 14711/26285 cut-off events. [2025-02-08 08:36:40,707 INFO L125 PetriNetUnfolderBase]: For 27633/28578 co-relation queries the response was YES. [2025-02-08 08:36:40,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62730 conditions, 26285 events. 14711/26285 cut-off events. For 27633/28578 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 215111 event pairs, 10053 based on Foata normal form. 42/23695 useless extension candidates. Maximal degree in co-relation 45696. Up to 19957 conditions per place. [2025-02-08 08:36:40,861 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 77 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2025-02-08 08:36:40,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 118 transitions, 768 flow [2025-02-08 08:36:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:36:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:36:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2025-02-08 08:36:40,862 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2025-02-08 08:36:40,862 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 598 flow. Second operand 5 states and 251 transitions. [2025-02-08 08:36:40,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 118 transitions, 768 flow [2025-02-08 08:36:40,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 759 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:36:40,935 INFO L231 Difference]: Finished difference. Result has 116 places, 118 transitions, 605 flow [2025-02-08 08:36:40,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=605, PETRI_PLACES=116, PETRI_TRANSITIONS=118} [2025-02-08 08:36:40,936 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 26 predicate places. [2025-02-08 08:36:40,936 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 118 transitions, 605 flow [2025-02-08 08:36:40,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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 08:36:40,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:40,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:40,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-08 08:36:40,937 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:40,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:40,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1767405873, now seen corresponding path program 1 times [2025-02-08 08:36:40,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:40,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567623275] [2025-02-08 08:36:40,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:40,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:40,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:36:40,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:36:40,953 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:40,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:41,137 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 08:36:41,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:41,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567623275] [2025-02-08 08:36:41,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567623275] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:41,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954606034] [2025-02-08 08:36:41,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:41,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:41,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:41,140 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 08:36:41,143 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 08:36:41,196 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:36:41,216 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:36:41,216 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:41,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:41,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:36:41,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:41,226 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 08:36:41,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:36:41,271 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 08:36:41,280 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:36:41,281 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 08:36:41,331 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 08:36:41,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:41,417 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 08:36:41,481 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 08:36:41,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954606034] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:41,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:41,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-08 08:36:41,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017194477] [2025-02-08 08:36:41,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:41,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:36:41,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:41,483 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:36:41,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:36:42,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2025-02-08 08:36:42,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 118 transitions, 605 flow. Second operand has 13 states, 13 states have (on average 46.07692307692308) internal successors, (599), 13 states have internal predecessors, (599), 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 08:36:42,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:42,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2025-02-08 08:36:42,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:44,091 INFO L124 PetriNetUnfolderBase]: 12804/22427 cut-off events. [2025-02-08 08:36:44,091 INFO L125 PetriNetUnfolderBase]: For 23570/24388 co-relation queries the response was YES. [2025-02-08 08:36:44,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53848 conditions, 22427 events. 12804/22427 cut-off events. For 23570/24388 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 176558 event pairs, 5876 based on Foata normal form. 94/19873 useless extension candidates. Maximal degree in co-relation 39014. Up to 7196 conditions per place. [2025-02-08 08:36:44,186 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 146 selfloop transitions, 30 changer transitions 0/205 dead transitions. [2025-02-08 08:36:44,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 205 transitions, 1281 flow [2025-02-08 08:36:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:36:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:36:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 536 transitions. [2025-02-08 08:36:44,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2025-02-08 08:36:44,188 INFO L175 Difference]: Start difference. First operand has 116 places, 118 transitions, 605 flow. Second operand 9 states and 536 transitions. [2025-02-08 08:36:44,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 205 transitions, 1281 flow [2025-02-08 08:36:44,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 205 transitions, 1261 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:36:44,250 INFO L231 Difference]: Finished difference. Result has 122 places, 120 transitions, 680 flow [2025-02-08 08:36:44,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=680, PETRI_PLACES=122, PETRI_TRANSITIONS=120} [2025-02-08 08:36:44,250 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 32 predicate places. [2025-02-08 08:36:44,250 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 120 transitions, 680 flow [2025-02-08 08:36:44,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 46.07692307692308) internal successors, (599), 13 states have internal predecessors, (599), 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 08:36:44,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:44,251 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:44,259 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 08:36:44,451 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,SelfDestructingSolverStorable14 [2025-02-08 08:36:44,452 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:44,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1296546298, now seen corresponding path program 1 times [2025-02-08 08:36:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:44,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824407986] [2025-02-08 08:36:44,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:44,458 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:36:44,463 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:36:44,463 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:44,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:36:44,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:44,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824407986] [2025-02-08 08:36:44,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824407986] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:44,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:44,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:36:44,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681247168] [2025-02-08 08:36:44,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:44,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:36:44,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:44,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:36:44,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:36:44,561 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2025-02-08 08:36:44,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 120 transitions, 680 flow. Second operand has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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 08:36:44,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:44,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2025-02-08 08:36:44,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:46,024 INFO L124 PetriNetUnfolderBase]: 10875/19231 cut-off events. [2025-02-08 08:36:46,025 INFO L125 PetriNetUnfolderBase]: For 32106/32822 co-relation queries the response was YES. [2025-02-08 08:36:46,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49710 conditions, 19231 events. 10875/19231 cut-off events. For 32106/32822 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 148178 event pairs, 6816 based on Foata normal form. 200/17093 useless extension candidates. Maximal degree in co-relation 37037. Up to 9199 conditions per place. [2025-02-08 08:36:46,138 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 136 selfloop transitions, 17 changer transitions 0/184 dead transitions. [2025-02-08 08:36:46,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 184 transitions, 1358 flow [2025-02-08 08:36:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:36:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:36:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2025-02-08 08:36:46,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2025-02-08 08:36:46,140 INFO L175 Difference]: Start difference. First operand has 122 places, 120 transitions, 680 flow. Second operand 5 states and 338 transitions. [2025-02-08 08:36:46,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 184 transitions, 1358 flow [2025-02-08 08:36:46,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 184 transitions, 1282 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-02-08 08:36:46,199 INFO L231 Difference]: Finished difference. Result has 122 places, 124 transitions, 700 flow [2025-02-08 08:36:46,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=700, PETRI_PLACES=122, PETRI_TRANSITIONS=124} [2025-02-08 08:36:46,200 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 32 predicate places. [2025-02-08 08:36:46,200 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 124 transitions, 700 flow [2025-02-08 08:36:46,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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 08:36:46,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:46,200 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:46,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-08 08:36:46,200 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:46,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 315590, now seen corresponding path program 1 times [2025-02-08 08:36:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:46,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987922104] [2025-02-08 08:36:46,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:46,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:46,208 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:36:46,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:36:46,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:46,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:36:46,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:46,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987922104] [2025-02-08 08:36:46,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987922104] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:46,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382666873] [2025-02-08 08:36:46,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:46,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:46,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:46,510 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 08:36:46,512 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 08:36:46,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:36:46,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:36:46,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:46,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:46,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:36:46,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:46,608 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 08:36:46,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:36:46,653 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 08:36:46,671 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:36:46,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:36:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:36:46,699 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 08:36:46,710 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:36:46,710 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 08:36:46,774 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 08:36:46,775 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:46,986 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 100 treesize of output 96 [2025-02-08 08:36:47,164 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 08:36:47,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382666873] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:47,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:47,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-02-08 08:36:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855934982] [2025-02-08 08:36:47,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:47,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:36:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:47,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:36:47,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:36:51,218 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 96 [2025-02-08 08:36:51,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 124 transitions, 700 flow. Second operand has 16 states, 16 states have (on average 38.1875) internal successors, (611), 16 states have internal predecessors, (611), 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 08:36:51,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:51,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 96 [2025-02-08 08:36:51,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:53,409 INFO L124 PetriNetUnfolderBase]: 19143/32432 cut-off events. [2025-02-08 08:36:53,409 INFO L125 PetriNetUnfolderBase]: For 51478/53751 co-relation queries the response was YES. [2025-02-08 08:36:53,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83488 conditions, 32432 events. 19143/32432 cut-off events. For 51478/53751 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 252329 event pairs, 7787 based on Foata normal form. 0/28275 useless extension candidates. Maximal degree in co-relation 61122. Up to 10793 conditions per place. [2025-02-08 08:36:53,633 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 178 selfloop transitions, 30 changer transitions 0/233 dead transitions. [2025-02-08 08:36:53,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 233 transitions, 1619 flow [2025-02-08 08:36:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:36:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:36:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 476 transitions. [2025-02-08 08:36:53,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5509259259259259 [2025-02-08 08:36:53,635 INFO L175 Difference]: Start difference. First operand has 122 places, 124 transitions, 700 flow. Second operand 9 states and 476 transitions. [2025-02-08 08:36:53,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 233 transitions, 1619 flow [2025-02-08 08:36:53,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 233 transitions, 1595 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:36:53,750 INFO L231 Difference]: Finished difference. Result has 129 places, 127 transitions, 775 flow [2025-02-08 08:36:53,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=775, PETRI_PLACES=129, PETRI_TRANSITIONS=127} [2025-02-08 08:36:53,751 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 39 predicate places. [2025-02-08 08:36:53,751 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 127 transitions, 775 flow [2025-02-08 08:36:53,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 38.1875) internal successors, (611), 16 states have internal predecessors, (611), 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 08:36:53,752 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:53,752 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:53,758 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 08:36:53,955 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,SelfDestructingSolverStorable16 [2025-02-08 08:36:53,955 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:53,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash 9783940, now seen corresponding path program 1 times [2025-02-08 08:36:53,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:53,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344991207] [2025-02-08 08:36:53,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:53,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:53,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:36:53,968 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:36:53,968 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:53,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:54,012 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 08:36:54,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:54,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344991207] [2025-02-08 08:36:54,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344991207] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:54,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:54,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:36:54,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309327634] [2025-02-08 08:36:54,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:54,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:36:54,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:54,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:36:54,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:36:54,087 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 96 [2025-02-08 08:36:54,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 127 transitions, 775 flow. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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 08:36:54,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:54,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 96 [2025-02-08 08:36:54,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:55,381 INFO L124 PetriNetUnfolderBase]: 14918/25785 cut-off events. [2025-02-08 08:36:55,381 INFO L125 PetriNetUnfolderBase]: For 54053/56230 co-relation queries the response was YES. [2025-02-08 08:36:55,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71870 conditions, 25785 events. 14918/25785 cut-off events. For 54053/56230 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 198640 event pairs, 10042 based on Foata normal form. 171/24767 useless extension candidates. Maximal degree in co-relation 51170. Up to 20134 conditions per place. [2025-02-08 08:36:55,534 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 88 selfloop transitions, 9 changer transitions 0/123 dead transitions. [2025-02-08 08:36:55,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 123 transitions, 961 flow [2025-02-08 08:36:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:36:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:36:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2025-02-08 08:36:55,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5572916666666666 [2025-02-08 08:36:55,535 INFO L175 Difference]: Start difference. First operand has 129 places, 127 transitions, 775 flow. Second operand 4 states and 214 transitions. [2025-02-08 08:36:55,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 123 transitions, 961 flow [2025-02-08 08:36:55,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 123 transitions, 908 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-02-08 08:36:55,608 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 732 flow [2025-02-08 08:36:55,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=732, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2025-02-08 08:36:55,609 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 32 predicate places. [2025-02-08 08:36:55,609 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 732 flow [2025-02-08 08:36:55,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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 08:36:55,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:55,609 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:55,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-08 08:36:55,609 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:55,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash 9783941, now seen corresponding path program 1 times [2025-02-08 08:36:55,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:55,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264437160] [2025-02-08 08:36:55,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:55,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:55,617 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:36:55,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:36:55,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:55,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:55,766 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 08:36:55,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264437160] [2025-02-08 08:36:55,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264437160] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158326992] [2025-02-08 08:36:55,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:55,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:55,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:55,769 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 08:36:55,771 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 08:36:55,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:36:55,860 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:36:55,860 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:55,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:55,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:36:55,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:55,935 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 08:36:55,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:55,988 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 08:36:55,996 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 08:36:55,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158326992] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:55,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:55,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-02-08 08:36:55,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874191593] [2025-02-08 08:36:55,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:55,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:36:55,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:55,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:36:55,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:36:56,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 96 [2025-02-08 08:36:56,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 732 flow. Second operand has 11 states, 11 states have (on average 49.36363636363637) internal successors, (543), 11 states have internal predecessors, (543), 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 08:36:56,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:56,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 96 [2025-02-08 08:36:56,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:57,734 INFO L124 PetriNetUnfolderBase]: 14471/24019 cut-off events. [2025-02-08 08:36:57,734 INFO L125 PetriNetUnfolderBase]: For 47326/49116 co-relation queries the response was YES. [2025-02-08 08:36:57,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67238 conditions, 24019 events. 14471/24019 cut-off events. For 47326/49116 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 173786 event pairs, 6530 based on Foata normal form. 175/22837 useless extension candidates. Maximal degree in co-relation 50477. Up to 7714 conditions per place. [2025-02-08 08:36:57,872 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 161 selfloop transitions, 30 changer transitions 0/216 dead transitions. [2025-02-08 08:36:57,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 216 transitions, 1586 flow [2025-02-08 08:36:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:36:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:36:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 461 transitions. [2025-02-08 08:36:57,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6860119047619048 [2025-02-08 08:36:57,874 INFO L175 Difference]: Start difference. First operand has 122 places, 123 transitions, 732 flow. Second operand 7 states and 461 transitions. [2025-02-08 08:36:57,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 216 transitions, 1586 flow [2025-02-08 08:36:57,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 216 transitions, 1576 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:36:57,970 INFO L231 Difference]: Finished difference. Result has 127 places, 123 transitions, 803 flow [2025-02-08 08:36:57,970 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=803, PETRI_PLACES=127, PETRI_TRANSITIONS=123} [2025-02-08 08:36:57,970 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 37 predicate places. [2025-02-08 08:36:57,971 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 123 transitions, 803 flow [2025-02-08 08:36:57,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 49.36363636363637) internal successors, (543), 11 states have internal predecessors, (543), 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 08:36:57,971 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:57,971 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:57,977 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 08:36:58,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:58,172 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:36:58,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1846220692, now seen corresponding path program 1 times [2025-02-08 08:36:58,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:58,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724134418] [2025-02-08 08:36:58,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:58,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:58,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:36:58,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:36:58,185 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:58,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:36:58,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724134418] [2025-02-08 08:36:58,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724134418] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:58,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537608685] [2025-02-08 08:36:58,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:58,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:58,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:58,324 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 08:36:58,326 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 08:36:58,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:36:58,408 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:36:58,408 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:58,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:58,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:36:58,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:58,420 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 08:36:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:36:58,467 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 08:36:58,474 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:36:58,474 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 08:36:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:36:58,531 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:58,630 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 08:36:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:36:58,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537608685] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:58,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:58,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-08 08:36:58,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643969432] [2025-02-08 08:36:58,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:58,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:36:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:58,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:36:58,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:36:59,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 96 [2025-02-08 08:36:59,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 123 transitions, 803 flow. Second operand has 13 states, 13 states have (on average 45.84615384615385) internal successors, (596), 13 states have internal predecessors, (596), 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 08:36:59,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:59,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 96 [2025-02-08 08:36:59,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:01,224 INFO L124 PetriNetUnfolderBase]: 19502/31391 cut-off events. [2025-02-08 08:37:01,224 INFO L125 PetriNetUnfolderBase]: For 87583/92063 co-relation queries the response was YES. [2025-02-08 08:37:01,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93653 conditions, 31391 events. 19502/31391 cut-off events. For 87583/92063 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 227386 event pairs, 7993 based on Foata normal form. 381/29979 useless extension candidates. Maximal degree in co-relation 59312. Up to 10745 conditions per place. [2025-02-08 08:37:01,488 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 173 selfloop transitions, 30 changer transitions 0/227 dead transitions. [2025-02-08 08:37:01,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 227 transitions, 1823 flow [2025-02-08 08:37:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:37:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:37:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 525 transitions. [2025-02-08 08:37:01,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6076388888888888 [2025-02-08 08:37:01,490 INFO L175 Difference]: Start difference. First operand has 127 places, 123 transitions, 803 flow. Second operand 9 states and 525 transitions. [2025-02-08 08:37:01,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 227 transitions, 1823 flow [2025-02-08 08:37:01,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 227 transitions, 1742 flow, removed 8 selfloop flow, removed 5 redundant places. [2025-02-08 08:37:01,611 INFO L231 Difference]: Finished difference. Result has 131 places, 126 transitions, 845 flow [2025-02-08 08:37:01,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=845, PETRI_PLACES=131, PETRI_TRANSITIONS=126} [2025-02-08 08:37:01,611 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 41 predicate places. [2025-02-08 08:37:01,612 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 126 transitions, 845 flow [2025-02-08 08:37:01,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.84615384615385) internal successors, (596), 13 states have internal predecessors, (596), 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 08:37:01,612 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:01,612 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:01,618 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 08:37:01,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:01,813 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:37:01,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash -783651635, now seen corresponding path program 1 times [2025-02-08 08:37:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:01,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563124148] [2025-02-08 08:37:01,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:01,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:01,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:37:01,823 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:37:01,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:01,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:01,902 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 08:37:01,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:01,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563124148] [2025-02-08 08:37:01,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563124148] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:01,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951567122] [2025-02-08 08:37:01,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:01,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:01,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:01,906 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 08:37:01,908 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 08:37:01,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:37:01,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:37:01,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:01,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:01,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:37:01,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:37:02,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:37:02,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951567122] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:02,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:02,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-02-08 08:37:02,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170572700] [2025-02-08 08:37:02,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:02,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:37:02,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:02,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:37:02,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:37:02,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2025-02-08 08:37:02,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 126 transitions, 845 flow. Second operand has 16 states, 16 states have (on average 51.25) internal successors, (820), 16 states have internal predecessors, (820), 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 08:37:02,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:02,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2025-02-08 08:37:02,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:07,762 INFO L124 PetriNetUnfolderBase]: 44820/76236 cut-off events. [2025-02-08 08:37:07,762 INFO L125 PetriNetUnfolderBase]: For 231125/239723 co-relation queries the response was YES. [2025-02-08 08:37:07,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232649 conditions, 76236 events. 44820/76236 cut-off events. For 231125/239723 co-relation queries the response was YES. Maximal size of possible extension queue 2123. Compared 676443 event pairs, 19924 based on Foata normal form. 1445/75041 useless extension candidates. Maximal degree in co-relation 134290. Up to 14096 conditions per place. [2025-02-08 08:37:08,225 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 427 selfloop transitions, 66 changer transitions 0/520 dead transitions. [2025-02-08 08:37:08,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 520 transitions, 4312 flow [2025-02-08 08:37:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-08 08:37:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-02-08 08:37:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1549 transitions. [2025-02-08 08:37:08,228 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6454166666666666 [2025-02-08 08:37:08,228 INFO L175 Difference]: Start difference. First operand has 131 places, 126 transitions, 845 flow. Second operand 25 states and 1549 transitions. [2025-02-08 08:37:08,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 520 transitions, 4312 flow [2025-02-08 08:37:08,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 520 transitions, 4136 flow, removed 40 selfloop flow, removed 6 redundant places. [2025-02-08 08:37:08,636 INFO L231 Difference]: Finished difference. Result has 158 places, 165 transitions, 1337 flow [2025-02-08 08:37:08,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1337, PETRI_PLACES=158, PETRI_TRANSITIONS=165} [2025-02-08 08:37:08,637 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 68 predicate places. [2025-02-08 08:37:08,637 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 165 transitions, 1337 flow [2025-02-08 08:37:08,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 51.25) internal successors, (820), 16 states have internal predecessors, (820), 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 08:37:08,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:08,638 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:08,644 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 08:37:08,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:08,838 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:37:08,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1398267276, now seen corresponding path program 1 times [2025-02-08 08:37:08,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:08,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888987887] [2025-02-08 08:37:08,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:08,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:08,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:37:08,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:37:08,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:08,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:08,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:08,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888987887] [2025-02-08 08:37:08,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888987887] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:08,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62920185] [2025-02-08 08:37:08,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:08,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:08,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:08,965 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 08:37:08,967 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 08:37:09,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:37:09,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:37:09,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:09,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:09,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:37:09,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:09,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:09,185 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 08:37:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:09,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62920185] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:09,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:09,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-02-08 08:37:09,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016962060] [2025-02-08 08:37:09,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:09,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:37:09,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:09,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:37:09,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:37:09,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 96 [2025-02-08 08:37:09,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 165 transitions, 1337 flow. Second operand has 11 states, 11 states have (on average 49.72727272727273) internal successors, (547), 11 states have internal predecessors, (547), 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 08:37:09,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:09,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 96 [2025-02-08 08:37:09,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:16,082 INFO L124 PetriNetUnfolderBase]: 48663/78193 cut-off events. [2025-02-08 08:37:16,082 INFO L125 PetriNetUnfolderBase]: For 305795/319187 co-relation queries the response was YES. [2025-02-08 08:37:16,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254509 conditions, 78193 events. 48663/78193 cut-off events. For 305795/319187 co-relation queries the response was YES. Maximal size of possible extension queue 2199. Compared 649581 event pairs, 20154 based on Foata normal form. 864/76737 useless extension candidates. Maximal degree in co-relation 245511. Up to 29195 conditions per place. [2025-02-08 08:37:16,694 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 243 selfloop transitions, 40 changer transitions 0/308 dead transitions. [2025-02-08 08:37:16,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 308 transitions, 3118 flow [2025-02-08 08:37:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:37:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:37:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 459 transitions. [2025-02-08 08:37:16,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6830357142857143 [2025-02-08 08:37:16,696 INFO L175 Difference]: Start difference. First operand has 158 places, 165 transitions, 1337 flow. Second operand 7 states and 459 transitions. [2025-02-08 08:37:16,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 308 transitions, 3118 flow [2025-02-08 08:37:17,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 308 transitions, 3025 flow, removed 36 selfloop flow, removed 4 redundant places. [2025-02-08 08:37:17,114 INFO L231 Difference]: Finished difference. Result has 161 places, 165 transitions, 1402 flow [2025-02-08 08:37:17,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1402, PETRI_PLACES=161, PETRI_TRANSITIONS=165} [2025-02-08 08:37:17,115 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 71 predicate places. [2025-02-08 08:37:17,116 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 165 transitions, 1402 flow [2025-02-08 08:37:17,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 49.72727272727273) internal successors, (547), 11 states have internal predecessors, (547), 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 08:37:17,117 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:17,117 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 08:37:17,124 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 08:37:17,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:17,321 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:37:17,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash -583739731, now seen corresponding path program 1 times [2025-02-08 08:37:17,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:17,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912949354] [2025-02-08 08:37:17,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:17,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:17,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:37:17,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:37:17,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:17,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:17,543 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 08:37:17,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912949354] [2025-02-08 08:37:17,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912949354] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:17,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292245851] [2025-02-08 08:37:17,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:17,546 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 08:37:17,549 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 08:37:17,607 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:37:17,632 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:37:17,633 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:17,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:17,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:37:17,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:37:17,693 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:37:17,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292245851] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:17,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:17,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-02-08 08:37:17,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101780352] [2025-02-08 08:37:17,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:17,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:37:17,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:17,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:37:17,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:37:18,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2025-02-08 08:37:18,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 165 transitions, 1402 flow. Second operand has 16 states, 16 states have (on average 51.5) internal successors, (824), 16 states have internal predecessors, (824), 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 08:37:18,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:18,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2025-02-08 08:37:18,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:27,688 INFO L124 PetriNetUnfolderBase]: 69253/115489 cut-off events. [2025-02-08 08:37:27,688 INFO L125 PetriNetUnfolderBase]: For 496807/512617 co-relation queries the response was YES. [2025-02-08 08:37:28,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385032 conditions, 115489 events. 69253/115489 cut-off events. For 496807/512617 co-relation queries the response was YES. Maximal size of possible extension queue 3407. Compared 1058423 event pairs, 30537 based on Foata normal form. 1811/114852 useless extension candidates. Maximal degree in co-relation 359123. Up to 23189 conditions per place. [2025-02-08 08:37:28,727 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 437 selfloop transitions, 92 changer transitions 0/556 dead transitions. [2025-02-08 08:37:28,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 556 transitions, 5313 flow [2025-02-08 08:37:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-08 08:37:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-08 08:37:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1584 transitions. [2025-02-08 08:37:28,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2025-02-08 08:37:28,730 INFO L175 Difference]: Start difference. First operand has 161 places, 165 transitions, 1402 flow. Second operand 26 states and 1584 transitions. [2025-02-08 08:37:28,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 556 transitions, 5313 flow [2025-02-08 08:37:29,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 556 transitions, 5162 flow, removed 20 selfloop flow, removed 5 redundant places. [2025-02-08 08:37:29,962 INFO L231 Difference]: Finished difference. Result has 187 places, 202 transitions, 1939 flow [2025-02-08 08:37:29,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1939, PETRI_PLACES=187, PETRI_TRANSITIONS=202} [2025-02-08 08:37:29,963 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 97 predicate places. [2025-02-08 08:37:29,963 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 202 transitions, 1939 flow [2025-02-08 08:37:29,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 51.5) internal successors, (824), 16 states have internal predecessors, (824), 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 08:37:29,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:29,963 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:29,969 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 08:37:30,163 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,SelfDestructingSolverStorable22 [2025-02-08 08:37:30,164 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:37:30,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1106713669, now seen corresponding path program 1 times [2025-02-08 08:37:30,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:30,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427249928] [2025-02-08 08:37:30,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:30,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:30,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:37:30,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:37:30,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:30,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:30,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:30,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427249928] [2025-02-08 08:37:30,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427249928] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:30,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034034789] [2025-02-08 08:37:30,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:30,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:30,267 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 08:37:30,269 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 08:37:30,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:37:30,365 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:37:30,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:30,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:30,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:37:30,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:30,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:30,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034034789] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:30,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:30,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-02-08 08:37:30,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307157604] [2025-02-08 08:37:30,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:30,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:37:30,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:30,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:37:30,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:37:30,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2025-02-08 08:37:30,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 202 transitions, 1939 flow. Second operand has 16 states, 16 states have (on average 51.6875) internal successors, (827), 16 states have internal predecessors, (827), 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 08:37:30,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:30,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2025-02-08 08:37:30,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand