./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:33:06,153 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:33:06,232 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:33:06,239 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:33:06,239 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:33:06,262 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:33:06,263 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:33:06,263 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:33:06,263 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:33:06,263 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:33:06,263 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:33:06,263 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:33:06,263 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:33:06,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:33:06,263 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:33:06,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:33:06,264 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:33:06,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:33:06,264 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:33:06,265 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:33:06,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:33:06,265 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:33:06,265 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:33:06,265 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:33:06,265 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:33:06,265 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 -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2025-02-08 08:33:06,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:33:06,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:33:06,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:33:06,515 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:33:06,515 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:33:06,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2025-02-08 08:33:07,775 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c1d6d41ca/3b77f5a38b1348f5a12ff001defbfcd1/FLAGdbab83ddf [2025-02-08 08:33:08,035 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:33:08,035 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2025-02-08 08:33:08,043 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c1d6d41ca/3b77f5a38b1348f5a12ff001defbfcd1/FLAGdbab83ddf [2025-02-08 08:33:08,057 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c1d6d41ca/3b77f5a38b1348f5a12ff001defbfcd1 [2025-02-08 08:33:08,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:33:08,060 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:33:08,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:33:08,061 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:33:08,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:33:08,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4338f2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08, skipping insertion in model container [2025-02-08 08:33:08,066 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,081 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:33:08,212 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 08:33:08,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:33:08,222 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:33:08,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:33:08,250 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:33:08,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08 WrapperNode [2025-02-08 08:33:08,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:33:08,252 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:33:08,252 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:33:08,252 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:33:08,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,278 INFO L138 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 101 [2025-02-08 08:33:08,279 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:33:08,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:33:08,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:33:08,280 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:33:08,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,291 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,306 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-08 08:33:08,309 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,317 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,318 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,320 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:33:08,324 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:33:08,324 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:33:08,324 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:33:08,325 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (1/1) ... [2025-02-08 08:33:08,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:33:08,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:08,364 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 08:33:08,369 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 08:33:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:33:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:33:08,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:33:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:33:08,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:33:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:33:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:33:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:33:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:33:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:33:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:33:08,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:33:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:33:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:33:08,386 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 08:33:08,447 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:33:08,448 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:33:08,661 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:33:08,661 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:33:08,884 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:33:08,884 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:33:08,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:33:08 BoogieIcfgContainer [2025-02-08 08:33:08,885 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:33:08,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:33:08,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:33:08,894 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:33:08,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:33:08" (1/3) ... [2025-02-08 08:33:08,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565ecb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:33:08, skipping insertion in model container [2025-02-08 08:33:08,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:08" (2/3) ... [2025-02-08 08:33:08,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565ecb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:33:08, skipping insertion in model container [2025-02-08 08:33:08,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:33:08" (3/3) ... [2025-02-08 08:33:08,900 INFO L128 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2025-02-08 08:33:08,923 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:33:08,928 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array-eq-symm.wvr.c that has 3 procedures, 43 locations, 1 initial locations, 4 loop locations, and 14 error locations. [2025-02-08 08:33:08,928 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:33:09,002 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 08:33:09,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2025-02-08 08:33:09,095 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-02-08 08:33:09,097 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:33:09,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 104 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-02-08 08:33:09,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2025-02-08 08:33:09,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2025-02-08 08:33:09,126 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:33:09,146 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;@150ae02c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:33:09,147 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2025-02-08 08:33:09,153 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:33:09,154 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:33:09,154 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:33:09,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:09,155 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:33:09,159 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:09,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:09,167 INFO L85 PathProgramCache]: Analyzing trace with hash 376673, now seen corresponding path program 1 times [2025-02-08 08:33:09,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:09,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325609754] [2025-02-08 08:33:09,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:09,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:09,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:33:09,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:33:09,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:09,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:09,414 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 08:33:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325609754] [2025-02-08 08:33:09,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325609754] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:09,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:09,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:33:09,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931545618] [2025-02-08 08:33:09,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:09,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:33:09,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:09,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:33:09,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:33:09,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:09,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:33:09,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:09,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:09,573 INFO L124 PetriNetUnfolderBase]: 79/203 cut-off events. [2025-02-08 08:33:09,573 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-02-08 08:33:09,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 203 events. 79/203 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 885 event pairs, 26 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 283. Up to 110 conditions per place. [2025-02-08 08:33:09,576 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 18 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2025-02-08 08:33:09,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 134 flow [2025-02-08 08:33:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:33:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:33:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-02-08 08:33:09,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2025-02-08 08:33:09,585 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 95 transitions. [2025-02-08 08:33:09,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 134 flow [2025-02-08 08:33:09,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:33:09,589 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2025-02-08 08:33:09,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2025-02-08 08:33:09,592 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2025-02-08 08:33:09,592 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2025-02-08 08:33:09,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:33:09,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:09,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:33:09,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:33:09,593 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:09,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:09,593 INFO L85 PathProgramCache]: Analyzing trace with hash 376674, now seen corresponding path program 1 times [2025-02-08 08:33:09,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:09,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214140331] [2025-02-08 08:33:09,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:09,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:09,598 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:33:09,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:33:09,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:09,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:09,765 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 08:33:09,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:09,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214140331] [2025-02-08 08:33:09,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214140331] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:09,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:09,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:33:09,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857215656] [2025-02-08 08:33:09,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:09,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:09,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:09,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:09,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:09,797 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:09,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:33:09,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:09,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:09,876 INFO L124 PetriNetUnfolderBase]: 80/206 cut-off events. [2025-02-08 08:33:09,876 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:33:09,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 206 events. 80/206 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 885 event pairs, 26 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 307. Up to 119 conditions per place. [2025-02-08 08:33:09,878 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 21 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2025-02-08 08:33:09,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 146 flow [2025-02-08 08:33:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:33:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:33:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2025-02-08 08:33:09,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2025-02-08 08:33:09,879 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 122 transitions. [2025-02-08 08:33:09,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 146 flow [2025-02-08 08:33:09,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:33:09,880 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 113 flow [2025-02-08 08:33:09,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2025-02-08 08:33:09,881 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2025-02-08 08:33:09,881 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 113 flow [2025-02-08 08:33:09,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:33:09,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:09,881 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:33:09,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:33:09,881 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:09,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:09,882 INFO L85 PathProgramCache]: Analyzing trace with hash 11678734, now seen corresponding path program 1 times [2025-02-08 08:33:09,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:09,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777991955] [2025-02-08 08:33:09,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:09,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:09,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:33:09,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:33:09,896 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:09,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:10,086 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 08:33:10,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:10,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777991955] [2025-02-08 08:33:10,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777991955] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:10,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:10,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:10,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933849045] [2025-02-08 08:33:10,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:10,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:10,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:10,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:10,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:10,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:10,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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 08:33:10,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:10,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:10,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:10,233 INFO L124 PetriNetUnfolderBase]: 81/209 cut-off events. [2025-02-08 08:33:10,233 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:33:10,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 209 events. 81/209 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 915 event pairs, 26 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 328. Up to 118 conditions per place. [2025-02-08 08:33:10,235 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 21 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2025-02-08 08:33:10,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 175 flow [2025-02-08 08:33:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2025-02-08 08:33:10,237 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2025-02-08 08:33:10,237 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 113 flow. Second operand 5 states and 149 transitions. [2025-02-08 08:33:10,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 175 flow [2025-02-08 08:33:10,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:10,238 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 147 flow [2025-02-08 08:33:10,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2025-02-08 08:33:10,238 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2025-02-08 08:33:10,238 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 147 flow [2025-02-08 08:33:10,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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 08:33:10,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:10,239 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:33:10,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:33:10,239 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:10,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:10,239 INFO L85 PathProgramCache]: Analyzing trace with hash 361995208, now seen corresponding path program 1 times [2025-02-08 08:33:10,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:10,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664757669] [2025-02-08 08:33:10,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:10,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:10,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:33:10,250 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:33:10,250 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:10,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:10,393 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 08:33:10,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664757669] [2025-02-08 08:33:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664757669] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043249841] [2025-02-08 08:33:10,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:10,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:10,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:10,395 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 08:33:10,426 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 08:33:10,467 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:33:10,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:33:10,478 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:10,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:10,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:33:10,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:10,525 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 08:33:10,676 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 08:33:10,676 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:10,748 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 08:33:10,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043249841] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:10,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:10,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:33:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595580232] [2025-02-08 08:33:10,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:10,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:33:10,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:10,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:33:10,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:33:10,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:10,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 147 flow. Second operand has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 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 08:33:10,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:10,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:10,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:11,138 INFO L124 PetriNetUnfolderBase]: 82/211 cut-off events. [2025-02-08 08:33:11,138 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-08 08:33:11,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 211 events. 82/211 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 923 event pairs, 26 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 338. Up to 119 conditions per place. [2025-02-08 08:33:11,139 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 10 changer transitions 0/49 dead transitions. [2025-02-08 08:33:11,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 218 flow [2025-02-08 08:33:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:33:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:33:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2025-02-08 08:33:11,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755208333333334 [2025-02-08 08:33:11,141 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 147 flow. Second operand 8 states and 221 transitions. [2025-02-08 08:33:11,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 218 flow [2025-02-08 08:33:11,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:11,142 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 177 flow [2025-02-08 08:33:11,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2025-02-08 08:33:11,143 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2025-02-08 08:33:11,143 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 177 flow [2025-02-08 08:33:11,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 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 08:33:11,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:11,143 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:33:11,150 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 08:33:11,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:11,347 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:11,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:11,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1661626320, now seen corresponding path program 1 times [2025-02-08 08:33:11,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:11,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531626664] [2025-02-08 08:33:11,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:11,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:11,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:33:11,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:33:11,362 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:11,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:11,548 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 08:33:11,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:11,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531626664] [2025-02-08 08:33:11,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531626664] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:11,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652356460] [2025-02-08 08:33:11,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:11,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:11,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:11,551 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 08:33:11,559 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 08:33:11,599 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:33:11,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:33:11,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:11,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:11,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:33:11,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:11,636 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 08:33:11,723 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 08:33:11,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:11,850 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 08:33:11,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652356460] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:11,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:11,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:33:11,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876269806] [2025-02-08 08:33:11,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:11,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:33:11,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:11,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:33:11,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:33:12,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:12,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 177 flow. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 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 08:33:12,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:12,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:12,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:12,309 INFO L124 PetriNetUnfolderBase]: 82/210 cut-off events. [2025-02-08 08:33:12,309 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-08 08:33:12,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 210 events. 82/210 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 894 event pairs, 26 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 337. Up to 110 conditions per place. [2025-02-08 08:33:12,311 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 14 selfloop transitions, 15 changer transitions 0/48 dead transitions. [2025-02-08 08:33:12,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 231 flow [2025-02-08 08:33:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:33:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:33:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2025-02-08 08:33:12,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2025-02-08 08:33:12,316 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 177 flow. Second operand 7 states and 195 transitions. [2025-02-08 08:33:12,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 231 flow [2025-02-08 08:33:12,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 184 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-08 08:33:12,317 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 156 flow [2025-02-08 08:33:12,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2025-02-08 08:33:12,318 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2025-02-08 08:33:12,318 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 156 flow [2025-02-08 08:33:12,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 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 08:33:12,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:12,318 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:12,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 08:33:12,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:12,523 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:12,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:12,527 INFO L85 PathProgramCache]: Analyzing trace with hash 32185982, now seen corresponding path program 1 times [2025-02-08 08:33:12,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:12,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083578497] [2025-02-08 08:33:12,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:12,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:12,532 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:33:12,536 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:33:12,536 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:12,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:12,605 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 08:33:12,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:12,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083578497] [2025-02-08 08:33:12,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083578497] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:12,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:12,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:12,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561769794] [2025-02-08 08:33:12,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:12,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:12,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:12,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:12,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:12,629 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-08 08:33:12,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 08:33:12,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:12,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-08 08:33:12,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:12,711 INFO L124 PetriNetUnfolderBase]: 117/323 cut-off events. [2025-02-08 08:33:12,711 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-08 08:33:12,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 323 events. 117/323 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1645 event pairs, 46 based on Foata normal form. 7/197 useless extension candidates. Maximal degree in co-relation 369. Up to 136 conditions per place. [2025-02-08 08:33:12,713 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 42 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2025-02-08 08:33:12,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 314 flow [2025-02-08 08:33:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2025-02-08 08:33:12,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6958333333333333 [2025-02-08 08:33:12,715 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 156 flow. Second operand 5 states and 167 transitions. [2025-02-08 08:33:12,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 314 flow [2025-02-08 08:33:12,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 273 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-02-08 08:33:12,717 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 158 flow [2025-02-08 08:33:12,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2025-02-08 08:33:12,717 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2025-02-08 08:33:12,717 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 158 flow [2025-02-08 08:33:12,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 08:33:12,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:12,718 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:12,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:33:12,718 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:12,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1429710876, now seen corresponding path program 1 times [2025-02-08 08:33:12,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:12,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106671592] [2025-02-08 08:33:12,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:12,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:12,726 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:33:12,731 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:33:12,731 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:12,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:12,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:12,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106671592] [2025-02-08 08:33:12,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106671592] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:12,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:12,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:33:12,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960714533] [2025-02-08 08:33:12,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:12,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:12,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:12,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:12,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:12,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-08 08:33:12,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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 08:33:12,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:12,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-08 08:33:12,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:12,932 INFO L124 PetriNetUnfolderBase]: 231/644 cut-off events. [2025-02-08 08:33:12,932 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-02-08 08:33:12,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 644 events. 231/644 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4133 event pairs, 67 based on Foata normal form. 7/387 useless extension candidates. Maximal degree in co-relation 784. Up to 157 conditions per place. [2025-02-08 08:33:12,935 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 47 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2025-02-08 08:33:12,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 327 flow [2025-02-08 08:33:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2025-02-08 08:33:12,943 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.725 [2025-02-08 08:33:12,943 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 158 flow. Second operand 5 states and 174 transitions. [2025-02-08 08:33:12,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 327 flow [2025-02-08 08:33:12,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:33:12,945 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 186 flow [2025-02-08 08:33:12,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2025-02-08 08:33:12,946 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2025-02-08 08:33:12,946 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 186 flow [2025-02-08 08:33:12,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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 08:33:12,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:12,946 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:12,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-08 08:33:12,946 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:12,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:12,949 INFO L85 PathProgramCache]: Analyzing trace with hash 845511032, now seen corresponding path program 1 times [2025-02-08 08:33:12,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:12,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030739752] [2025-02-08 08:33:12,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:12,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:12,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:33:12,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:33:12,964 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:12,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:13,008 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 08:33:13,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030739752] [2025-02-08 08:33:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030739752] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:13,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284023700] [2025-02-08 08:33:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:13,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:13,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:13,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:13,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:13,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-02-08 08:33:13,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 08:33:13,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:13,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-02-08 08:33:13,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:13,115 INFO L124 PetriNetUnfolderBase]: 261/628 cut-off events. [2025-02-08 08:33:13,115 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2025-02-08 08:33:13,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 628 events. 261/628 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3736 event pairs, 138 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 689. Up to 418 conditions per place. [2025-02-08 08:33:13,117 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 30 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2025-02-08 08:33:13,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 250 flow [2025-02-08 08:33:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:33:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:33:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-02-08 08:33:13,118 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-02-08 08:33:13,118 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 186 flow. Second operand 4 states and 104 transitions. [2025-02-08 08:33:13,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 250 flow [2025-02-08 08:33:13,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:13,119 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 188 flow [2025-02-08 08:33:13,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2025-02-08 08:33:13,120 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2025-02-08 08:33:13,120 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 188 flow [2025-02-08 08:33:13,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 08:33:13,120 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:13,120 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:13,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:33:13,120 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:13,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash 845511033, now seen corresponding path program 1 times [2025-02-08 08:33:13,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:13,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647409986] [2025-02-08 08:33:13,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:13,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:13,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:33:13,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:33:13,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:13,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:13,161 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 08:33:13,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:13,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647409986] [2025-02-08 08:33:13,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647409986] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:13,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:13,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:13,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147350176] [2025-02-08 08:33:13,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:13,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:13,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:13,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:13,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:13,188 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-08 08:33:13,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 08:33:13,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:13,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-08 08:33:13,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:13,267 INFO L124 PetriNetUnfolderBase]: 176/415 cut-off events. [2025-02-08 08:33:13,267 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-02-08 08:33:13,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 415 events. 176/415 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2291 event pairs, 96 based on Foata normal form. 6/329 useless extension candidates. Maximal degree in co-relation 492. Up to 261 conditions per place. [2025-02-08 08:33:13,269 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 41 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2025-02-08 08:33:13,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 320 flow [2025-02-08 08:33:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2025-02-08 08:33:13,270 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2025-02-08 08:33:13,270 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 188 flow. Second operand 5 states and 165 transitions. [2025-02-08 08:33:13,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 320 flow [2025-02-08 08:33:13,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:33:13,271 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 197 flow [2025-02-08 08:33:13,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=197, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2025-02-08 08:33:13,272 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2025-02-08 08:33:13,272 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 197 flow [2025-02-08 08:33:13,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 08:33:13,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:13,272 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:13,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:33:13,272 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:13,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:13,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1858152194, now seen corresponding path program 1 times [2025-02-08 08:33:13,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:13,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048271106] [2025-02-08 08:33:13,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:13,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:13,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:33:13,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:33:13,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:13,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:13,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:13,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048271106] [2025-02-08 08:33:13,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048271106] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:13,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:13,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:13,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819992231] [2025-02-08 08:33:13,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:13,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:13,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:13,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:13,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:13,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-02-08 08:33:13,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 08:33:13,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:13,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-02-08 08:33:13,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:13,458 INFO L124 PetriNetUnfolderBase]: 221/532 cut-off events. [2025-02-08 08:33:13,458 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2025-02-08 08:33:13,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 532 events. 221/532 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2860 event pairs, 122 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 862. Up to 361 conditions per place. [2025-02-08 08:33:13,460 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 27 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2025-02-08 08:33:13,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 261 flow [2025-02-08 08:33:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2025-02-08 08:33:13,461 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-02-08 08:33:13,461 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 197 flow. Second operand 5 states and 124 transitions. [2025-02-08 08:33:13,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 261 flow [2025-02-08 08:33:13,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 253 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:33:13,462 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 199 flow [2025-02-08 08:33:13,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2025-02-08 08:33:13,463 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2025-02-08 08:33:13,463 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 199 flow [2025-02-08 08:33:13,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 08:33:13,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:13,463 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:13,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 08:33:13,463 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:13,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1858152195, now seen corresponding path program 1 times [2025-02-08 08:33:13,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:13,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921512888] [2025-02-08 08:33:13,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:13,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:13,470 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:33:13,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:33:13,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:13,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:13,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:13,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921512888] [2025-02-08 08:33:13,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921512888] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:13,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377402464] [2025-02-08 08:33:13,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:13,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:13,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:13,579 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 08:33:13,580 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 08:33:13,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:33:13,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:33:13,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:13,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:13,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:33:13,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:13,637 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 08:33:13,644 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 08:33:13,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:33:13,691 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 08:33:13,699 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:33:13,699 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 08:33:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:13,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377402464] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:13,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:33:13,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2025-02-08 08:33:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83764888] [2025-02-08 08:33:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:13,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:13,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:13,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:33:13,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:13,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 08:33:13,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:13,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:13,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:14,125 INFO L124 PetriNetUnfolderBase]: 232/559 cut-off events. [2025-02-08 08:33:14,126 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2025-02-08 08:33:14,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 559 events. 232/559 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3119 event pairs, 87 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 739. Up to 251 conditions per place. [2025-02-08 08:33:14,128 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 42 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2025-02-08 08:33:14,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 346 flow [2025-02-08 08:33:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2025-02-08 08:33:14,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2025-02-08 08:33:14,129 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 199 flow. Second operand 5 states and 161 transitions. [2025-02-08 08:33:14,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 346 flow [2025-02-08 08:33:14,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:33:14,130 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 220 flow [2025-02-08 08:33:14,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2025-02-08 08:33:14,130 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2025-02-08 08:33:14,131 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 220 flow [2025-02-08 08:33:14,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 08:33:14,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:14,131 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:14,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:14,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:14,331 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:14,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash 416936287, now seen corresponding path program 1 times [2025-02-08 08:33:14,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:14,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225647885] [2025-02-08 08:33:14,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:14,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:14,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:33:14,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:33:14,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:14,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:14,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:14,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225647885] [2025-02-08 08:33:14,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225647885] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:14,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:14,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:33:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878037817] [2025-02-08 08:33:14,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:14,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:14,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:14,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:14,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:14,407 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-08 08:33:14,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 08:33:14,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:14,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-08 08:33:14,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:14,496 INFO L124 PetriNetUnfolderBase]: 246/610 cut-off events. [2025-02-08 08:33:14,496 INFO L125 PetriNetUnfolderBase]: For 251/262 co-relation queries the response was YES. [2025-02-08 08:33:14,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 610 events. 246/610 cut-off events. For 251/262 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3505 event pairs, 95 based on Foata normal form. 3/486 useless extension candidates. Maximal degree in co-relation 1002. Up to 226 conditions per place. [2025-02-08 08:33:14,499 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 45 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2025-02-08 08:33:14,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 390 flow [2025-02-08 08:33:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2025-02-08 08:33:14,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-02-08 08:33:14,500 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 220 flow. Second operand 5 states and 170 transitions. [2025-02-08 08:33:14,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 390 flow [2025-02-08 08:33:14,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 377 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:33:14,502 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 242 flow [2025-02-08 08:33:14,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2025-02-08 08:33:14,502 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2025-02-08 08:33:14,502 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 242 flow [2025-02-08 08:33:14,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 08:33:14,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:14,503 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:14,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 08:33:14,503 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:14,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:14,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1768143510, now seen corresponding path program 1 times [2025-02-08 08:33:14,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:14,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354720897] [2025-02-08 08:33:14,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:14,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:14,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:33:14,516 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:33:14,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:14,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:14,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:14,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354720897] [2025-02-08 08:33:14,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354720897] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135192518] [2025-02-08 08:33:14,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:14,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:14,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:14,651 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 08:33:14,654 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 08:33:14,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:33:14,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:33:14,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:14,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:14,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:33:14,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:14,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:14,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-02-08 08:33:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:14,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135192518] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:14,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:14,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-08 08:33:14,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312944547] [2025-02-08 08:33:14,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:14,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:33:14,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:14,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:33:14,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:33:15,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:15,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 242 flow. Second operand has 12 states, 12 states have (on average 25.75) internal successors, (309), 12 states have internal predecessors, (309), 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 08:33:15,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:15,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:15,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:15,300 INFO L124 PetriNetUnfolderBase]: 292/639 cut-off events. [2025-02-08 08:33:15,300 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2025-02-08 08:33:15,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 639 events. 292/639 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3575 event pairs, 79 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1183. Up to 177 conditions per place. [2025-02-08 08:33:15,303 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 56 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2025-02-08 08:33:15,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 464 flow [2025-02-08 08:33:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:33:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:33:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2025-02-08 08:33:15,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2025-02-08 08:33:15,304 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 242 flow. Second operand 7 states and 229 transitions. [2025-02-08 08:33:15,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 464 flow [2025-02-08 08:33:15,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:33:15,317 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 269 flow [2025-02-08 08:33:15,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2025-02-08 08:33:15,318 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2025-02-08 08:33:15,318 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 269 flow [2025-02-08 08:33:15,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.75) internal successors, (309), 12 states have internal predecessors, (309), 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 08:33:15,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:15,318 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:15,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:33:15,519 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,SelfDestructingSolverStorable12 [2025-02-08 08:33:15,519 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:15,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1042583299, now seen corresponding path program 1 times [2025-02-08 08:33:15,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:15,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202372329] [2025-02-08 08:33:15,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:15,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:15,526 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:33:15,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:33:15,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:15,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:15,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:15,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202372329] [2025-02-08 08:33:15,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202372329] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:15,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832388734] [2025-02-08 08:33:15,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:15,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:15,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:15,668 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 08:33:15,673 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 08:33:15,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:33:15,721 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:33:15,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:15,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:15,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:33:15,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:15,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:15,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-02-08 08:33:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:15,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832388734] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:15,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:15,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-08 08:33:15,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423377143] [2025-02-08 08:33:15,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:15,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:33:15,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:15,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:33:15,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:33:16,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:16,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 269 flow. Second operand has 12 states, 12 states have (on average 26.25) internal successors, (315), 12 states have internal predecessors, (315), 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 08:33:16,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:16,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:16,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:16,391 INFO L124 PetriNetUnfolderBase]: 307/707 cut-off events. [2025-02-08 08:33:16,391 INFO L125 PetriNetUnfolderBase]: For 719/770 co-relation queries the response was YES. [2025-02-08 08:33:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1655 conditions, 707 events. 307/707 cut-off events. For 719/770 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4096 event pairs, 95 based on Foata normal form. 0/613 useless extension candidates. Maximal degree in co-relation 1366. Up to 213 conditions per place. [2025-02-08 08:33:16,394 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 52 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2025-02-08 08:33:16,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 497 flow [2025-02-08 08:33:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:33:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:33:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2025-02-08 08:33:16,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2025-02-08 08:33:16,395 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 269 flow. Second operand 7 states and 225 transitions. [2025-02-08 08:33:16,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 497 flow [2025-02-08 08:33:16,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 459 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-02-08 08:33:16,397 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 275 flow [2025-02-08 08:33:16,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2025-02-08 08:33:16,398 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2025-02-08 08:33:16,398 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 275 flow [2025-02-08 08:33:16,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.25) internal successors, (315), 12 states have internal predecessors, (315), 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 08:33:16,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:16,398 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:16,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:16,598 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,SelfDestructingSolverStorable13 [2025-02-08 08:33:16,599 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:16,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2039656424, now seen corresponding path program 1 times [2025-02-08 08:33:16,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:16,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558900460] [2025-02-08 08:33:16,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:16,612 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:33:16,617 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:16,617 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:16,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:16,734 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 08:33:16,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:16,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558900460] [2025-02-08 08:33:16,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558900460] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:16,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883753991] [2025-02-08 08:33:16,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:16,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:16,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:16,737 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 08:33:16,738 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 08:33:16,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:33:16,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:16,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:16,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:16,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:33:16,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:16,793 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 08:33:16,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:33:16,829 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 08:33:16,836 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:33:16,836 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 08:33:16,882 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 08:33:16,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:16,961 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 61 treesize of output 57 [2025-02-08 08:33:17,006 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 08:33:17,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883753991] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:17,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:17,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:33:17,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273842555] [2025-02-08 08:33:17,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:17,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:33:17,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:17,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:33:17,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:33:17,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:17,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 275 flow. Second operand has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 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 08:33:17,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:17,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:17,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:17,615 INFO L124 PetriNetUnfolderBase]: 307/649 cut-off events. [2025-02-08 08:33:17,616 INFO L125 PetriNetUnfolderBase]: For 544/595 co-relation queries the response was YES. [2025-02-08 08:33:17,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 649 events. 307/649 cut-off events. For 544/595 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3556 event pairs, 130 based on Foata normal form. 0/577 useless extension candidates. Maximal degree in co-relation 1310. Up to 213 conditions per place. [2025-02-08 08:33:17,619 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 49 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2025-02-08 08:33:17,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 78 transitions, 500 flow [2025-02-08 08:33:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:33:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:33:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2025-02-08 08:33:17,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6067708333333334 [2025-02-08 08:33:17,621 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 275 flow. Second operand 8 states and 233 transitions. [2025-02-08 08:33:17,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 78 transitions, 500 flow [2025-02-08 08:33:17,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 469 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-08 08:33:17,623 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 296 flow [2025-02-08 08:33:17,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2025-02-08 08:33:17,623 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2025-02-08 08:33:17,624 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 296 flow [2025-02-08 08:33:17,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 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 08:33:17,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:17,624 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:17,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:17,830 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,SelfDestructingSolverStorable14 [2025-02-08 08:33:17,830 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:17,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:17,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1284701768, now seen corresponding path program 1 times [2025-02-08 08:33:17,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:17,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232456907] [2025-02-08 08:33:17,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:17,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:17,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:33:17,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:33:17,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:17,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:17,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232456907] [2025-02-08 08:33:17,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232456907] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:17,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296707743] [2025-02-08 08:33:17,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:17,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:17,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:17,911 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 08:33:17,912 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 08:33:17,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:33:17,957 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:33:17,957 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:17,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:17,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:33:17,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:18,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296707743] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:18,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:18,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2025-02-08 08:33:18,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653394043] [2025-02-08 08:33:18,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:18,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:33:18,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:18,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:33:18,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:33:18,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-08 08:33:18,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 296 flow. Second operand has 15 states, 15 states have (on average 27.2) internal successors, (408), 15 states have internal predecessors, (408), 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 08:33:18,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:18,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-08 08:33:18,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:18,637 INFO L124 PetriNetUnfolderBase]: 771/1791 cut-off events. [2025-02-08 08:33:18,638 INFO L125 PetriNetUnfolderBase]: For 2039/2235 co-relation queries the response was YES. [2025-02-08 08:33:18,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4476 conditions, 1791 events. 771/1791 cut-off events. For 2039/2235 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13240 event pairs, 315 based on Foata normal form. 48/1710 useless extension candidates. Maximal degree in co-relation 2316. Up to 263 conditions per place. [2025-02-08 08:33:18,646 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 160 selfloop transitions, 29 changer transitions 0/207 dead transitions. [2025-02-08 08:33:18,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 207 transitions, 1252 flow [2025-02-08 08:33:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-08 08:33:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-08 08:33:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 834 transitions. [2025-02-08 08:33:18,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6682692307692307 [2025-02-08 08:33:18,648 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 296 flow. Second operand 26 states and 834 transitions. [2025-02-08 08:33:18,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 207 transitions, 1252 flow [2025-02-08 08:33:18,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 207 transitions, 1219 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-02-08 08:33:18,652 INFO L231 Difference]: Finished difference. Result has 106 places, 70 transitions, 499 flow [2025-02-08 08:33:18,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=499, PETRI_PLACES=106, PETRI_TRANSITIONS=70} [2025-02-08 08:33:18,652 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 60 predicate places. [2025-02-08 08:33:18,652 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 70 transitions, 499 flow [2025-02-08 08:33:18,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 27.2) internal successors, (408), 15 states have internal predecessors, (408), 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 08:33:18,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:18,653 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:18,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:18,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:18,857 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:18,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:18,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1792451006, now seen corresponding path program 1 times [2025-02-08 08:33:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:18,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521688348] [2025-02-08 08:33:18,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:18,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:18,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:33:18,875 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:33:18,875 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:18,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:18,944 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 08:33:18,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521688348] [2025-02-08 08:33:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521688348] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357145532] [2025-02-08 08:33:18,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:18,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:18,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:18,947 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 08:33:18,948 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 08:33:18,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:33:18,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:33:18,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:18,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:18,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:33:18,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:19,071 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357145532] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:19,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:19,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2025-02-08 08:33:19,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181186496] [2025-02-08 08:33:19,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:19,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:33:19,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:19,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:33:19,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:33:19,306 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-08 08:33:19,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 70 transitions, 499 flow. Second operand has 15 states, 15 states have (on average 27.4) internal successors, (411), 15 states have internal predecessors, (411), 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 08:33:19,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:19,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-08 08:33:19,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:19,742 INFO L124 PetriNetUnfolderBase]: 603/1413 cut-off events. [2025-02-08 08:33:19,743 INFO L125 PetriNetUnfolderBase]: For 2212/2413 co-relation queries the response was YES. [2025-02-08 08:33:19,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3677 conditions, 1413 events. 603/1413 cut-off events. For 2212/2413 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10167 event pairs, 362 based on Foata normal form. 36/1320 useless extension candidates. Maximal degree in co-relation 3494. Up to 436 conditions per place. [2025-02-08 08:33:19,751 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 132 selfloop transitions, 32 changer transitions 0/182 dead transitions. [2025-02-08 08:33:19,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 182 transitions, 1188 flow [2025-02-08 08:33:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-08 08:33:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-02-08 08:33:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 865 transitions. [2025-02-08 08:33:19,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6436011904761905 [2025-02-08 08:33:19,754 INFO L175 Difference]: Start difference. First operand has 106 places, 70 transitions, 499 flow. Second operand 28 states and 865 transitions. [2025-02-08 08:33:19,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 182 transitions, 1188 flow [2025-02-08 08:33:19,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 182 transitions, 1171 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:33:19,760 INFO L231 Difference]: Finished difference. Result has 131 places, 76 transitions, 613 flow [2025-02-08 08:33:19,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=613, PETRI_PLACES=131, PETRI_TRANSITIONS=76} [2025-02-08 08:33:19,761 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 85 predicate places. [2025-02-08 08:33:19,761 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 76 transitions, 613 flow [2025-02-08 08:33:19,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 27.4) internal successors, (411), 15 states have internal predecessors, (411), 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 08:33:19,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:19,762 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 08:33:19,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:19,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-08 08:33:19,963 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:19,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1782064885, now seen corresponding path program 1 times [2025-02-08 08:33:19,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:19,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830119627] [2025-02-08 08:33:19,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:19,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:19,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:33:19,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:33:19,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:19,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:19,999 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 08:33:19,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:20,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830119627] [2025-02-08 08:33:20,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830119627] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:20,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:20,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:33:20,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264967122] [2025-02-08 08:33:20,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:20,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:33:20,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:20,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:33:20,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:33:20,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 48 [2025-02-08 08:33:20,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 76 transitions, 613 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 08:33:20,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:20,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 48 [2025-02-08 08:33:20,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:20,137 INFO L124 PetriNetUnfolderBase]: 516/1314 cut-off events. [2025-02-08 08:33:20,137 INFO L125 PetriNetUnfolderBase]: For 2659/2869 co-relation queries the response was YES. [2025-02-08 08:33:20,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3486 conditions, 1314 events. 516/1314 cut-off events. For 2659/2869 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9383 event pairs, 160 based on Foata normal form. 9/1218 useless extension candidates. Maximal degree in co-relation 3300. Up to 622 conditions per place. [2025-02-08 08:33:20,144 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 52 selfloop transitions, 9 changer transitions 13/93 dead transitions. [2025-02-08 08:33:20,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 93 transitions, 880 flow [2025-02-08 08:33:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:33:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:33:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2025-02-08 08:33:20,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2025-02-08 08:33:20,146 INFO L175 Difference]: Start difference. First operand has 131 places, 76 transitions, 613 flow. Second operand 3 states and 110 transitions. [2025-02-08 08:33:20,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 93 transitions, 880 flow [2025-02-08 08:33:20,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 93 transitions, 819 flow, removed 9 selfloop flow, removed 14 redundant places. [2025-02-08 08:33:20,151 INFO L231 Difference]: Finished difference. Result has 120 places, 72 transitions, 560 flow [2025-02-08 08:33:20,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=560, PETRI_PLACES=120, PETRI_TRANSITIONS=72} [2025-02-08 08:33:20,151 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 74 predicate places. [2025-02-08 08:33:20,151 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 72 transitions, 560 flow [2025-02-08 08:33:20,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 08:33:20,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:20,152 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:20,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-08 08:33:20,153 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:20,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:20,153 INFO L85 PathProgramCache]: Analyzing trace with hash -889671476, now seen corresponding path program 2 times [2025-02-08 08:33:20,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:20,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87926480] [2025-02-08 08:33:20,153 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:20,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:20,160 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-08 08:33:20,170 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:33:20,170 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:20,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:33:20,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:20,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87926480] [2025-02-08 08:33:20,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87926480] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:20,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289540874] [2025-02-08 08:33:20,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:20,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:20,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:20,389 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 08:33:20,394 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 08:33:20,434 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-08 08:33:20,451 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:33:20,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:20,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:20,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-08 08:33:20,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:20,462 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 08:33:20,537 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:33:20,537 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 08:33:20,540 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 08:33:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:33:20,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:20,797 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 61 treesize of output 57 [2025-02-08 08:33:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:33:20,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289540874] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:20,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:20,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 18 [2025-02-08 08:33:20,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922086581] [2025-02-08 08:33:20,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:20,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 08:33:20,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:20,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 08:33:20,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:33:25,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:33:29,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:33:33,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:33:33,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-02-08 08:33:33,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 72 transitions, 560 flow. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 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 08:33:33,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:33,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-02-08 08:33:33,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:34,599 INFO L124 PetriNetUnfolderBase]: 873/1869 cut-off events. [2025-02-08 08:33:34,599 INFO L125 PetriNetUnfolderBase]: For 5048/5208 co-relation queries the response was YES. [2025-02-08 08:33:34,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5486 conditions, 1869 events. 873/1869 cut-off events. For 5048/5208 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13125 event pairs, 276 based on Foata normal form. 36/1803 useless extension candidates. Maximal degree in co-relation 5461. Up to 365 conditions per place. [2025-02-08 08:33:34,608 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 94 selfloop transitions, 25 changer transitions 0/134 dead transitions. [2025-02-08 08:33:34,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 134 transitions, 1069 flow [2025-02-08 08:33:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-08 08:33:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-02-08 08:33:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 411 transitions. [2025-02-08 08:33:34,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5036764705882353 [2025-02-08 08:33:34,610 INFO L175 Difference]: Start difference. First operand has 120 places, 72 transitions, 560 flow. Second operand 17 states and 411 transitions. [2025-02-08 08:33:34,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 134 transitions, 1069 flow [2025-02-08 08:33:34,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 134 transitions, 981 flow, removed 10 selfloop flow, removed 11 redundant places. [2025-02-08 08:33:34,614 INFO L231 Difference]: Finished difference. Result has 108 places, 75 transitions, 592 flow [2025-02-08 08:33:34,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=592, PETRI_PLACES=108, PETRI_TRANSITIONS=75} [2025-02-08 08:33:34,615 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2025-02-08 08:33:34,616 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 75 transitions, 592 flow [2025-02-08 08:33:34,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 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 08:33:34,616 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:34,616 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:34,622 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 08:33:34,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:34,817 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:34,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:34,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1810011667, now seen corresponding path program 1 times [2025-02-08 08:33:34,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:34,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055710618] [2025-02-08 08:33:34,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:34,827 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:33:34,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:33:34,833 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:34,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:33:34,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:34,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055710618] [2025-02-08 08:33:34,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055710618] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:34,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832645331] [2025-02-08 08:33:34,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:34,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:34,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:34,982 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 08:33:34,983 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 08:33:35,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:33:35,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:33:35,037 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:35,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:35,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:33:35,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:33:35,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:35,197 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 30 treesize of output 26 [2025-02-08 08:33:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:33:35,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832645331] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:35,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:35,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-02-08 08:33:35,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324400776] [2025-02-08 08:33:35,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:35,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-08 08:33:35,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:35,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-08 08:33:35,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2025-02-08 08:33:35,738 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:35,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 75 transitions, 592 flow. Second operand has 19 states, 19 states have (on average 25.894736842105264) internal successors, (492), 19 states have internal predecessors, (492), 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 08:33:35,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:35,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:35,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:36,089 INFO L124 PetriNetUnfolderBase]: 781/1682 cut-off events. [2025-02-08 08:33:36,089 INFO L125 PetriNetUnfolderBase]: For 3459/3611 co-relation queries the response was YES. [2025-02-08 08:33:36,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4656 conditions, 1682 events. 781/1682 cut-off events. For 3459/3611 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11663 event pairs, 225 based on Foata normal form. 20/1594 useless extension candidates. Maximal degree in co-relation 4634. Up to 327 conditions per place. [2025-02-08 08:33:36,101 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 91 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2025-02-08 08:33:36,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1032 flow [2025-02-08 08:33:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:33:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:33:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 333 transitions. [2025-02-08 08:33:36,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.69375 [2025-02-08 08:33:36,102 INFO L175 Difference]: Start difference. First operand has 108 places, 75 transitions, 592 flow. Second operand 10 states and 333 transitions. [2025-02-08 08:33:36,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1032 flow [2025-02-08 08:33:36,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 979 flow, removed 7 selfloop flow, removed 11 redundant places. [2025-02-08 08:33:36,106 INFO L231 Difference]: Finished difference. Result has 109 places, 77 transitions, 620 flow [2025-02-08 08:33:36,107 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=620, PETRI_PLACES=109, PETRI_TRANSITIONS=77} [2025-02-08 08:33:36,107 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2025-02-08 08:33:36,107 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 77 transitions, 620 flow [2025-02-08 08:33:36,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 25.894736842105264) internal successors, (492), 19 states have internal predecessors, (492), 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 08:33:36,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:36,108 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:36,114 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 08:33:36,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:36,309 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:36,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash 283934662, now seen corresponding path program 2 times [2025-02-08 08:33:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271333309] [2025-02-08 08:33:36,309 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:36,315 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-08 08:33:36,322 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:33:36,322 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:36,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:33:36,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271333309] [2025-02-08 08:33:36,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271333309] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775946833] [2025-02-08 08:33:36,475 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:36,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:36,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:36,477 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 08:33:36,478 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 08:33:36,517 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-08 08:33:36,533 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:33:36,533 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:36,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:36,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:33:36,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:33:36,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:36,677 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 30 treesize of output 26 [2025-02-08 08:33:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:33:36,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775946833] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:36,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:36,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-02-08 08:33:36,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224279313] [2025-02-08 08:33:36,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:36,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:33:36,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:36,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:33:36,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:33:37,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:37,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 77 transitions, 620 flow. Second operand has 18 states, 18 states have (on average 26.11111111111111) internal successors, (470), 18 states have internal predecessors, (470), 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 08:33:37,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:37,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:37,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:37,599 INFO L124 PetriNetUnfolderBase]: 1006/2310 cut-off events. [2025-02-08 08:33:37,599 INFO L125 PetriNetUnfolderBase]: For 6334/6567 co-relation queries the response was YES. [2025-02-08 08:33:37,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6308 conditions, 2310 events. 1006/2310 cut-off events. For 6334/6567 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17403 event pairs, 248 based on Foata normal form. 27/2189 useless extension candidates. Maximal degree in co-relation 6285. Up to 442 conditions per place. [2025-02-08 08:33:37,616 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 87 selfloop transitions, 25 changer transitions 0/131 dead transitions. [2025-02-08 08:33:37,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 131 transitions, 1109 flow [2025-02-08 08:33:37,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:33:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:33:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 325 transitions. [2025-02-08 08:33:37,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2025-02-08 08:33:37,617 INFO L175 Difference]: Start difference. First operand has 109 places, 77 transitions, 620 flow. Second operand 10 states and 325 transitions. [2025-02-08 08:33:37,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 131 transitions, 1109 flow [2025-02-08 08:33:37,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 131 transitions, 1077 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-02-08 08:33:37,623 INFO L231 Difference]: Finished difference. Result has 117 places, 80 transitions, 678 flow [2025-02-08 08:33:37,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=678, PETRI_PLACES=117, PETRI_TRANSITIONS=80} [2025-02-08 08:33:37,624 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2025-02-08 08:33:37,624 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 80 transitions, 678 flow [2025-02-08 08:33:37,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 26.11111111111111) internal successors, (470), 18 states have internal predecessors, (470), 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 08:33:37,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:37,624 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:37,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:37,824 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,SelfDestructingSolverStorable20 [2025-02-08 08:33:37,825 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:37,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:37,826 INFO L85 PathProgramCache]: Analyzing trace with hash 212040255, now seen corresponding path program 1 times [2025-02-08 08:33:37,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:37,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123216915] [2025-02-08 08:33:37,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:37,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:37,831 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:33:37,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:33:37,838 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:37,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:33:37,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:37,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123216915] [2025-02-08 08:33:37,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123216915] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:37,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580279947] [2025-02-08 08:33:37,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:37,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:37,993 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 08:33:37,994 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 08:33:38,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:33:38,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:33:38,052 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:38,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:38,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:33:38,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:38,063 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 08:33:38,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:33:38,129 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 08:33:38,134 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:33:38,134 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 08:33:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:33:38,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:38,313 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 61 treesize of output 57 [2025-02-08 08:33:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:33:38,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580279947] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:38,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:38,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-02-08 08:33:38,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121762223] [2025-02-08 08:33:38,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:38,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 08:33:38,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:38,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 08:33:38,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:33:39,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:39,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 80 transitions, 678 flow. Second operand has 17 states, 17 states have (on average 24.647058823529413) internal successors, (419), 17 states have internal predecessors, (419), 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 08:33:39,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:39,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:39,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:39,477 INFO L124 PetriNetUnfolderBase]: 1020/2186 cut-off events. [2025-02-08 08:33:39,477 INFO L125 PetriNetUnfolderBase]: For 7113/7320 co-relation queries the response was YES. [2025-02-08 08:33:39,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6299 conditions, 2186 events. 1020/2186 cut-off events. For 7113/7320 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15900 event pairs, 417 based on Foata normal form. 27/2064 useless extension candidates. Maximal degree in co-relation 6273. Up to 549 conditions per place. [2025-02-08 08:33:39,490 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 72 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2025-02-08 08:33:39,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 118 transitions, 1091 flow [2025-02-08 08:33:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:33:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 08:33:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 316 transitions. [2025-02-08 08:33:39,492 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2025-02-08 08:33:39,492 INFO L175 Difference]: Start difference. First operand has 117 places, 80 transitions, 678 flow. Second operand 11 states and 316 transitions. [2025-02-08 08:33:39,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 118 transitions, 1091 flow [2025-02-08 08:33:39,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 1056 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-08 08:33:39,498 INFO L231 Difference]: Finished difference. Result has 125 places, 82 transitions, 724 flow [2025-02-08 08:33:39,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=724, PETRI_PLACES=125, PETRI_TRANSITIONS=82} [2025-02-08 08:33:39,498 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 79 predicate places. [2025-02-08 08:33:39,498 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 82 transitions, 724 flow [2025-02-08 08:33:39,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 24.647058823529413) internal successors, (419), 17 states have internal predecessors, (419), 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 08:33:39,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:39,499 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:39,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-08 08:33:39,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:39,703 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:39,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:39,703 INFO L85 PathProgramCache]: Analyzing trace with hash 316733384, now seen corresponding path program 2 times [2025-02-08 08:33:39,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:39,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849526735] [2025-02-08 08:33:39,703 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:39,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:39,708 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-08 08:33:39,720 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:33:39,720 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:39,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:33:39,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:39,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849526735] [2025-02-08 08:33:39,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849526735] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:39,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073162554] [2025-02-08 08:33:39,805 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:39,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:39,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:39,806 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:39,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 08:33:39,850 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-08 08:33:39,869 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:33:39,869 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:39,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:39,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:33:39,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:33:39,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:33:40,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073162554] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:40,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:40,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2025-02-08 08:33:40,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249060638] [2025-02-08 08:33:40,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:40,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-08 08:33:40,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:40,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-08 08:33:40,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2025-02-08 08:33:40,314 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-08 08:33:40,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 82 transitions, 724 flow. Second operand has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 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 08:33:40,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:40,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-08 08:33:40,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:41,304 INFO L124 PetriNetUnfolderBase]: 2562/5698 cut-off events. [2025-02-08 08:33:41,304 INFO L125 PetriNetUnfolderBase]: For 20307/20937 co-relation queries the response was YES. [2025-02-08 08:33:41,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17236 conditions, 5698 events. 2562/5698 cut-off events. For 20307/20937 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 50758 event pairs, 1517 based on Foata normal form. 88/5333 useless extension candidates. Maximal degree in co-relation 17208. Up to 1014 conditions per place. [2025-02-08 08:33:41,326 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 255 selfloop transitions, 59 changer transitions 0/337 dead transitions. [2025-02-08 08:33:41,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 337 transitions, 2757 flow [2025-02-08 08:33:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-02-08 08:33:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-02-08 08:33:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1433 transitions. [2025-02-08 08:33:41,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6490036231884058 [2025-02-08 08:33:41,328 INFO L175 Difference]: Start difference. First operand has 125 places, 82 transitions, 724 flow. Second operand 46 states and 1433 transitions. [2025-02-08 08:33:41,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 337 transitions, 2757 flow [2025-02-08 08:33:41,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 337 transitions, 2725 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:33:41,340 INFO L231 Difference]: Finished difference. Result has 169 places, 115 transitions, 1221 flow [2025-02-08 08:33:41,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1221, PETRI_PLACES=169, PETRI_TRANSITIONS=115} [2025-02-08 08:33:41,341 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 123 predicate places. [2025-02-08 08:33:41,341 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 115 transitions, 1221 flow [2025-02-08 08:33:41,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 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 08:33:41,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:41,341 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:41,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-08 08:33:41,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:41,542 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:41,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:41,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1005330293, now seen corresponding path program 3 times [2025-02-08 08:33:41,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:41,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172356790] [2025-02-08 08:33:41,543 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:33:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:41,550 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-08 08:33:41,561 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 25 statements. [2025-02-08 08:33:41,561 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:33:41,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:33:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172356790] [2025-02-08 08:33:41,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172356790] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320927040] [2025-02-08 08:33:41,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:33:41,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:41,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:41,678 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:41,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-08 08:33:41,718 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-08 08:33:41,735 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 25 statements. [2025-02-08 08:33:41,735 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:33:41,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:41,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:33:41,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:33:41,786 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:41,932 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 13 treesize of output 11 [2025-02-08 08:33:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:33:41,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320927040] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:41,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:41,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-08 08:33:41,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602388262] [2025-02-08 08:33:41,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:41,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:33:41,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:41,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:33:41,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:33:42,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:42,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 115 transitions, 1221 flow. Second operand has 15 states, 15 states have (on average 24.333333333333332) internal successors, (365), 15 states have internal predecessors, (365), 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 08:33:42,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:42,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:42,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:42,991 INFO L124 PetriNetUnfolderBase]: 3840/8308 cut-off events. [2025-02-08 08:33:42,992 INFO L125 PetriNetUnfolderBase]: For 27732/27732 co-relation queries the response was YES. [2025-02-08 08:33:43,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26392 conditions, 8308 events. 3840/8308 cut-off events. For 27732/27732 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 72123 event pairs, 809 based on Foata normal form. 111/8273 useless extension candidates. Maximal degree in co-relation 26358. Up to 2236 conditions per place. [2025-02-08 08:33:43,047 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 127 selfloop transitions, 33 changer transitions 0/176 dead transitions. [2025-02-08 08:33:43,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 176 transitions, 2144 flow [2025-02-08 08:33:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:33:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:33:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2025-02-08 08:33:43,050 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6015625 [2025-02-08 08:33:43,050 INFO L175 Difference]: Start difference. First operand has 169 places, 115 transitions, 1221 flow. Second operand 8 states and 231 transitions. [2025-02-08 08:33:43,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 176 transitions, 2144 flow [2025-02-08 08:33:43,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 176 transitions, 2065 flow, removed 4 selfloop flow, removed 16 redundant places. [2025-02-08 08:33:43,084 INFO L231 Difference]: Finished difference. Result has 160 places, 115 transitions, 1228 flow [2025-02-08 08:33:43,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1228, PETRI_PLACES=160, PETRI_TRANSITIONS=115} [2025-02-08 08:33:43,085 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 114 predicate places. [2025-02-08 08:33:43,085 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 115 transitions, 1228 flow [2025-02-08 08:33:43,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 24.333333333333332) internal successors, (365), 15 states have internal predecessors, (365), 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 08:33:43,086 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:43,086 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:43,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-08 08:33:43,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-08 08:33:43,290 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:43,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:43,290 INFO L85 PathProgramCache]: Analyzing trace with hash -122132036, now seen corresponding path program 1 times [2025-02-08 08:33:43,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:43,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476615605] [2025-02-08 08:33:43,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:43,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:43,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:33:43,299 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:33:43,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:43,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:33:43,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:43,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476615605] [2025-02-08 08:33:43,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476615605] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:43,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927897017] [2025-02-08 08:33:43,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:43,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:43,387 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:43,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-08 08:33:43,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:33:43,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:33:43,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:43,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:43,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:33:43,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:43,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:43,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927897017] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:43,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:33:43,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 15 [2025-02-08 08:33:43,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15444872] [2025-02-08 08:33:43,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:43,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:33:43,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:43,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:33:43,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:33:43,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:43,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 115 transitions, 1228 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 08:33:43,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:43,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:43,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:44,149 INFO L124 PetriNetUnfolderBase]: 2855/6245 cut-off events. [2025-02-08 08:33:44,150 INFO L125 PetriNetUnfolderBase]: For 29321/29983 co-relation queries the response was YES. [2025-02-08 08:33:44,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20439 conditions, 6245 events. 2855/6245 cut-off events. For 29321/29983 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 55514 event pairs, 871 based on Foata normal form. 110/5962 useless extension candidates. Maximal degree in co-relation 20407. Up to 2058 conditions per place. [2025-02-08 08:33:44,181 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 102 selfloop transitions, 19 changer transitions 0/144 dead transitions. [2025-02-08 08:33:44,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 144 transitions, 1734 flow [2025-02-08 08:33:44,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:33:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:33:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2025-02-08 08:33:44,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2025-02-08 08:33:44,182 INFO L175 Difference]: Start difference. First operand has 160 places, 115 transitions, 1228 flow. Second operand 7 states and 212 transitions. [2025-02-08 08:33:44,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 144 transitions, 1734 flow [2025-02-08 08:33:44,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 144 transitions, 1679 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-02-08 08:33:44,199 INFO L231 Difference]: Finished difference. Result has 162 places, 115 transitions, 1224 flow [2025-02-08 08:33:44,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1224, PETRI_PLACES=162, PETRI_TRANSITIONS=115} [2025-02-08 08:33:44,200 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 116 predicate places. [2025-02-08 08:33:44,200 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 115 transitions, 1224 flow [2025-02-08 08:33:44,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 08:33:44,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:44,200 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:44,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-08 08:33:44,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-08 08:33:44,404 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:44,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:44,405 INFO L85 PathProgramCache]: Analyzing trace with hash 767509424, now seen corresponding path program 1 times [2025-02-08 08:33:44,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:44,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730081245] [2025-02-08 08:33:44,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:44,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:44,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:33:44,414 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:33:44,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:44,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:33:44,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:44,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730081245] [2025-02-08 08:33:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730081245] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534521139] [2025-02-08 08:33:44,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:44,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:44,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:44,528 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:44,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-08 08:33:44,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:33:44,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:33:44,591 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:44,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:44,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:33:44,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:44,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:44,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534521139] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:44,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:33:44,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 16 [2025-02-08 08:33:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275149610] [2025-02-08 08:33:44,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:44,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:33:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:44,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:33:44,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:33:44,741 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:33:44,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 115 transitions, 1224 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 08:33:44,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:44,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:33:44,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:45,153 INFO L124 PetriNetUnfolderBase]: 2558/5419 cut-off events. [2025-02-08 08:33:45,154 INFO L125 PetriNetUnfolderBase]: For 28265/29044 co-relation queries the response was YES. [2025-02-08 08:33:45,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18109 conditions, 5419 events. 2558/5419 cut-off events. For 28265/29044 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 46451 event pairs, 795 based on Foata normal form. 165/5235 useless extension candidates. Maximal degree in co-relation 18076. Up to 2167 conditions per place. [2025-02-08 08:33:45,180 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 85 selfloop transitions, 33 changer transitions 0/140 dead transitions. [2025-02-08 08:33:45,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 140 transitions, 1603 flow [2025-02-08 08:33:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:33:45,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:33:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2025-02-08 08:33:45,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-02-08 08:33:45,181 INFO L175 Difference]: Start difference. First operand has 162 places, 115 transitions, 1224 flow. Second operand 7 states and 216 transitions. [2025-02-08 08:33:45,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 140 transitions, 1603 flow [2025-02-08 08:33:45,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 140 transitions, 1555 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:33:45,197 INFO L231 Difference]: Finished difference. Result has 164 places, 116 transitions, 1311 flow [2025-02-08 08:33:45,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1311, PETRI_PLACES=164, PETRI_TRANSITIONS=116} [2025-02-08 08:33:45,198 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 118 predicate places. [2025-02-08 08:33:45,198 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 116 transitions, 1311 flow [2025-02-08 08:33:45,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 08:33:45,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:45,198 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:45,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:45,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:45,399 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:45,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:45,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1100467686, now seen corresponding path program 2 times [2025-02-08 08:33:45,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:45,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269017834] [2025-02-08 08:33:45,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:45,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:45,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 08:33:45,410 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:33:45,414 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:45,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:33:45,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:45,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269017834] [2025-02-08 08:33:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269017834] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:45,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681580494] [2025-02-08 08:33:45,481 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:45,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:45,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:45,484 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:45,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-08 08:33:45,527 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 08:33:45,545 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:33:45,546 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:45,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:45,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:33:45,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:33:45,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:33:45,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681580494] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:45,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:45,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-08 08:33:45,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409082203] [2025-02-08 08:33:45,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:45,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:33:45,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:45,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:33:45,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:33:45,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-08 08:33:45,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 116 transitions, 1311 flow. Second operand has 18 states, 18 states have (on average 27.666666666666668) internal successors, (498), 18 states have internal predecessors, (498), 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 08:33:45,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:45,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-08 08:33:45,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:46,627 INFO L124 PetriNetUnfolderBase]: 2045/4766 cut-off events. [2025-02-08 08:33:46,627 INFO L125 PetriNetUnfolderBase]: For 30853/31728 co-relation queries the response was YES. [2025-02-08 08:33:46,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15865 conditions, 4766 events. 2045/4766 cut-off events. For 30853/31728 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 42688 event pairs, 1394 based on Foata normal form. 44/4500 useless extension candidates. Maximal degree in co-relation 15831. Up to 1979 conditions per place. [2025-02-08 08:33:46,656 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 103 selfloop transitions, 46 changer transitions 0/174 dead transitions. [2025-02-08 08:33:46,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 174 transitions, 1956 flow [2025-02-08 08:33:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:33:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:33:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 467 transitions. [2025-02-08 08:33:46,658 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486111111111111 [2025-02-08 08:33:46,658 INFO L175 Difference]: Start difference. First operand has 164 places, 116 transitions, 1311 flow. Second operand 15 states and 467 transitions. [2025-02-08 08:33:46,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 174 transitions, 1956 flow [2025-02-08 08:33:46,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 174 transitions, 1904 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-08 08:33:46,674 INFO L231 Difference]: Finished difference. Result has 176 places, 121 transitions, 1477 flow [2025-02-08 08:33:46,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1477, PETRI_PLACES=176, PETRI_TRANSITIONS=121} [2025-02-08 08:33:46,675 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 130 predicate places. [2025-02-08 08:33:46,675 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 121 transitions, 1477 flow [2025-02-08 08:33:46,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.666666666666668) internal successors, (498), 18 states have internal predecessors, (498), 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 08:33:46,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:46,675 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:46,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-08 08:33:46,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:46,876 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:46,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash 693873604, now seen corresponding path program 3 times [2025-02-08 08:33:46,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:46,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188849440] [2025-02-08 08:33:46,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:33:46,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:46,886 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-08 08:33:46,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 28 statements. [2025-02-08 08:33:46,896 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:33:46,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-08 08:33:47,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188849440] [2025-02-08 08:33:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188849440] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928926923] [2025-02-08 08:33:47,060 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:33:47,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:47,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:47,063 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:47,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-08 08:33:47,115 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-08 08:33:47,132 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 28 statements. [2025-02-08 08:33:47,132 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:33:47,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:47,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:33:47,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-08 08:33:47,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:47,524 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 50 treesize of output 46 [2025-02-08 08:33:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-08 08:33:47,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928926923] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:47,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:47,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-02-08 08:33:47,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749901247] [2025-02-08 08:33:47,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:47,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 08:33:47,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:47,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 08:33:47,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2025-02-08 08:33:48,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:48,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 121 transitions, 1477 flow. Second operand has 23 states, 23 states have (on average 24.47826086956522) internal successors, (563), 23 states have internal predecessors, (563), 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 08:33:48,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:48,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:48,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:48,919 INFO L124 PetriNetUnfolderBase]: 2727/5670 cut-off events. [2025-02-08 08:33:48,919 INFO L125 PetriNetUnfolderBase]: For 26821/27456 co-relation queries the response was YES. [2025-02-08 08:33:48,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19702 conditions, 5670 events. 2727/5670 cut-off events. For 26821/27456 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 47716 event pairs, 307 based on Foata normal form. 60/5485 useless extension candidates. Maximal degree in co-relation 19664. Up to 1501 conditions per place. [2025-02-08 08:33:48,951 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 110 selfloop transitions, 49 changer transitions 0/175 dead transitions. [2025-02-08 08:33:48,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 175 transitions, 2377 flow [2025-02-08 08:33:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:33:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:33:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 281 transitions. [2025-02-08 08:33:48,952 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5854166666666667 [2025-02-08 08:33:48,952 INFO L175 Difference]: Start difference. First operand has 176 places, 121 transitions, 1477 flow. Second operand 10 states and 281 transitions. [2025-02-08 08:33:48,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 175 transitions, 2377 flow [2025-02-08 08:33:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 175 transitions, 2279 flow, removed 2 selfloop flow, removed 11 redundant places. [2025-02-08 08:33:48,974 INFO L231 Difference]: Finished difference. Result has 173 places, 120 transitions, 1471 flow [2025-02-08 08:33:48,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1471, PETRI_PLACES=173, PETRI_TRANSITIONS=120} [2025-02-08 08:33:48,974 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 127 predicate places. [2025-02-08 08:33:48,974 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 120 transitions, 1471 flow [2025-02-08 08:33:48,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 24.47826086956522) internal successors, (563), 23 states have internal predecessors, (563), 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 08:33:48,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:48,975 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:48,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-08 08:33:49,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-08 08:33:49,179 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:49,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:49,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2040644340, now seen corresponding path program 3 times [2025-02-08 08:33:49,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:49,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485266573] [2025-02-08 08:33:49,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:33:49,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:49,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-08 08:33:49,188 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 28 statements. [2025-02-08 08:33:49,188 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:33:49,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-08 08:33:49,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:49,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485266573] [2025-02-08 08:33:49,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485266573] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:49,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511984645] [2025-02-08 08:33:49,314 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:33:49,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:49,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:49,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:49,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-08 08:33:49,362 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-02-08 08:33:49,377 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 28 statements. [2025-02-08 08:33:49,377 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:33:49,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:49,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-08 08:33:49,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:49,381 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 08:33:49,440 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:33:49,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2025-02-08 08:33:49,451 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:33:49,451 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 08:33:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-08 08:33:49,581 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:49,898 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 72 treesize of output 68 [2025-02-08 08:33:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-08 08:33:50,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511984645] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:50,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:50,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2025-02-08 08:33:50,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129084670] [2025-02-08 08:33:50,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:50,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-08 08:33:50,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:50,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-08 08:33:50,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2025-02-08 08:33:50,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-02-08 08:33:50,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 120 transitions, 1471 flow. Second operand has 21 states, 21 states have (on average 22.714285714285715) internal successors, (477), 21 states have internal predecessors, (477), 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 08:33:50,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:50,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-02-08 08:33:50,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:51,725 INFO L124 PetriNetUnfolderBase]: 2829/5910 cut-off events. [2025-02-08 08:33:51,725 INFO L125 PetriNetUnfolderBase]: For 32819/33866 co-relation queries the response was YES. [2025-02-08 08:33:51,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20647 conditions, 5910 events. 2829/5910 cut-off events. For 32819/33866 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 49792 event pairs, 236 based on Foata normal form. 49/5751 useless extension candidates. Maximal degree in co-relation 20612. Up to 1457 conditions per place. [2025-02-08 08:33:51,761 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 124 selfloop transitions, 58 changer transitions 0/197 dead transitions. [2025-02-08 08:33:51,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 197 transitions, 2913 flow [2025-02-08 08:33:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:33:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 08:33:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2025-02-08 08:33:51,767 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2025-02-08 08:33:51,767 INFO L175 Difference]: Start difference. First operand has 173 places, 120 transitions, 1471 flow. Second operand 11 states and 280 transitions. [2025-02-08 08:33:51,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 197 transitions, 2913 flow [2025-02-08 08:33:51,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 197 transitions, 2583 flow, removed 2 selfloop flow, removed 10 redundant places. [2025-02-08 08:33:51,804 INFO L231 Difference]: Finished difference. Result has 172 places, 119 transitions, 1429 flow [2025-02-08 08:33:51,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1429, PETRI_PLACES=172, PETRI_TRANSITIONS=119} [2025-02-08 08:33:51,805 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 126 predicate places. [2025-02-08 08:33:51,805 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 119 transitions, 1429 flow [2025-02-08 08:33:51,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.714285714285715) internal successors, (477), 21 states have internal predecessors, (477), 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 08:33:51,805 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:51,805 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:51,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:52,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:52,006 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:52,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash -966540906, now seen corresponding path program 1 times [2025-02-08 08:33:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:52,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290654133] [2025-02-08 08:33:52,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:52,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 08:33:52,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:33:52,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:52,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:33:52,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:52,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290654133] [2025-02-08 08:33:52,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290654133] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:52,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:52,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:33:52,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172323006] [2025-02-08 08:33:52,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:52,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:33:52,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:52,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:33:52,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:33:52,493 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:52,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 119 transitions, 1429 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:52,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:52,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:52,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:53,102 INFO L124 PetriNetUnfolderBase]: 3579/7438 cut-off events. [2025-02-08 08:33:53,103 INFO L125 PetriNetUnfolderBase]: For 29599/29599 co-relation queries the response was YES. [2025-02-08 08:33:53,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25977 conditions, 7438 events. 3579/7438 cut-off events. For 29599/29599 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 59239 event pairs, 854 based on Foata normal form. 45/7454 useless extension candidates. Maximal degree in co-relation 25945. Up to 5160 conditions per place. [2025-02-08 08:33:53,149 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 115 selfloop transitions, 47 changer transitions 16/189 dead transitions. [2025-02-08 08:33:53,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 189 transitions, 2422 flow [2025-02-08 08:33:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:33:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:33:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 270 transitions. [2025-02-08 08:33:53,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-08 08:33:53,150 INFO L175 Difference]: Start difference. First operand has 172 places, 119 transitions, 1429 flow. Second operand 9 states and 270 transitions. [2025-02-08 08:33:53,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 189 transitions, 2422 flow [2025-02-08 08:33:53,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 189 transitions, 2173 flow, removed 1 selfloop flow, removed 11 redundant places. [2025-02-08 08:33:53,185 INFO L231 Difference]: Finished difference. Result has 175 places, 141 transitions, 1802 flow [2025-02-08 08:33:53,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1802, PETRI_PLACES=175, PETRI_TRANSITIONS=141} [2025-02-08 08:33:53,185 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 129 predicate places. [2025-02-08 08:33:53,186 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 141 transitions, 1802 flow [2025-02-08 08:33:53,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:53,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:53,186 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:53,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-02-08 08:33:53,186 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:53,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:53,186 INFO L85 PathProgramCache]: Analyzing trace with hash 895579180, now seen corresponding path program 2 times [2025-02-08 08:33:53,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:53,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099758585] [2025-02-08 08:33:53,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:53,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:53,193 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 08:33:53,199 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:33:53,199 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:53,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:33:53,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099758585] [2025-02-08 08:33:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099758585] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:53,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:53,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:33:53,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801026804] [2025-02-08 08:33:53,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:53,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:33:53,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:53,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:33:53,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:33:53,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:53,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 141 transitions, 1802 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:53,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:53,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:53,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:54,293 INFO L124 PetriNetUnfolderBase]: 3597/7373 cut-off events. [2025-02-08 08:33:54,294 INFO L125 PetriNetUnfolderBase]: For 28359/28359 co-relation queries the response was YES. [2025-02-08 08:33:54,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26906 conditions, 7373 events. 3597/7373 cut-off events. For 28359/28359 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 58338 event pairs, 1250 based on Foata normal form. 45/7336 useless extension candidates. Maximal degree in co-relation 26870. Up to 5214 conditions per place. [2025-02-08 08:33:54,338 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 105 selfloop transitions, 92 changer transitions 9/217 dead transitions. [2025-02-08 08:33:54,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 217 transitions, 3243 flow [2025-02-08 08:33:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:33:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:33:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2025-02-08 08:33:54,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6134259259259259 [2025-02-08 08:33:54,339 INFO L175 Difference]: Start difference. First operand has 175 places, 141 transitions, 1802 flow. Second operand 9 states and 265 transitions. [2025-02-08 08:33:54,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 217 transitions, 3243 flow [2025-02-08 08:33:54,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 217 transitions, 3069 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-02-08 08:33:54,399 INFO L231 Difference]: Finished difference. Result has 181 places, 190 transitions, 2848 flow [2025-02-08 08:33:54,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2848, PETRI_PLACES=181, PETRI_TRANSITIONS=190} [2025-02-08 08:33:54,399 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 135 predicate places. [2025-02-08 08:33:54,399 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 190 transitions, 2848 flow [2025-02-08 08:33:54,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:54,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:54,399 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:54,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-02-08 08:33:54,400 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:54,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1499934694, now seen corresponding path program 1 times [2025-02-08 08:33:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:54,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567916436] [2025-02-08 08:33:54,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:54,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:54,404 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 08:33:54,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:33:54,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:54,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:33:54,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:54,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567916436] [2025-02-08 08:33:54,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567916436] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:54,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:54,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:33:54,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390001720] [2025-02-08 08:33:54,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:54,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:33:54,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:54,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:33:54,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:33:54,845 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:54,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 190 transitions, 2848 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:54,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:54,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:54,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:55,528 INFO L124 PetriNetUnfolderBase]: 3858/7838 cut-off events. [2025-02-08 08:33:55,528 INFO L125 PetriNetUnfolderBase]: For 31458/31458 co-relation queries the response was YES. [2025-02-08 08:33:55,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31172 conditions, 7838 events. 3858/7838 cut-off events. For 31458/31458 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 61356 event pairs, 1106 based on Foata normal form. 36/7845 useless extension candidates. Maximal degree in co-relation 31133. Up to 5322 conditions per place. [2025-02-08 08:33:55,578 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 115 selfloop transitions, 131 changer transitions 7/264 dead transitions. [2025-02-08 08:33:55,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 264 transitions, 4457 flow [2025-02-08 08:33:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:33:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:33:55,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2025-02-08 08:33:55,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6134259259259259 [2025-02-08 08:33:55,580 INFO L175 Difference]: Start difference. First operand has 181 places, 190 transitions, 2848 flow. Second operand 9 states and 265 transitions. [2025-02-08 08:33:55,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 264 transitions, 4457 flow [2025-02-08 08:33:55,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 264 transitions, 4435 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:55,723 INFO L231 Difference]: Finished difference. Result has 191 places, 236 transitions, 4167 flow [2025-02-08 08:33:55,723 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4167, PETRI_PLACES=191, PETRI_TRANSITIONS=236} [2025-02-08 08:33:55,724 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 145 predicate places. [2025-02-08 08:33:55,724 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 236 transitions, 4167 flow [2025-02-08 08:33:55,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:55,724 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:55,725 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:55,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-02-08 08:33:55,725 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:55,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1373881256, now seen corresponding path program 2 times [2025-02-08 08:33:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943877882] [2025-02-08 08:33:55,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:55,732 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 08:33:55,738 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:33:55,738 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:55,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:33:55,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:55,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943877882] [2025-02-08 08:33:55,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943877882] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:55,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:55,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:33:55,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174828125] [2025-02-08 08:33:55,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:55,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:33:55,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:55,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:33:55,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:33:56,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:56,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 236 transitions, 4167 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:56,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:56,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:56,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:56,984 INFO L124 PetriNetUnfolderBase]: 3822/7739 cut-off events. [2025-02-08 08:33:56,984 INFO L125 PetriNetUnfolderBase]: For 37246/37246 co-relation queries the response was YES. [2025-02-08 08:33:57,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32374 conditions, 7739 events. 3822/7739 cut-off events. For 37246/37246 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 60663 event pairs, 1135 based on Foata normal form. 36/7693 useless extension candidates. Maximal degree in co-relation 32330. Up to 5322 conditions per place. [2025-02-08 08:33:57,039 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 111 selfloop transitions, 142 changer transitions 15/279 dead transitions. [2025-02-08 08:33:57,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 279 transitions, 5163 flow [2025-02-08 08:33:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:33:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:33:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2025-02-08 08:33:57,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6134259259259259 [2025-02-08 08:33:57,040 INFO L175 Difference]: Start difference. First operand has 191 places, 236 transitions, 4167 flow. Second operand 9 states and 265 transitions. [2025-02-08 08:33:57,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 279 transitions, 5163 flow [2025-02-08 08:33:57,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 279 transitions, 4992 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-02-08 08:33:57,178 INFO L231 Difference]: Finished difference. Result has 198 places, 245 transitions, 4544 flow [2025-02-08 08:33:57,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4011, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4544, PETRI_PLACES=198, PETRI_TRANSITIONS=245} [2025-02-08 08:33:57,178 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 152 predicate places. [2025-02-08 08:33:57,179 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 245 transitions, 4544 flow [2025-02-08 08:33:57,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:57,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:57,179 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:57,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-02-08 08:33:57,179 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:57,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash -817835958, now seen corresponding path program 3 times [2025-02-08 08:33:57,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:57,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978328503] [2025-02-08 08:33:57,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:33:57,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:57,185 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:33:57,191 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 28 statements. [2025-02-08 08:33:57,191 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:33:57,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:33:57,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:57,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978328503] [2025-02-08 08:33:57,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978328503] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:57,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:57,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:33:57,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774085896] [2025-02-08 08:33:57,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:57,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:33:57,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:57,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:33:57,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:33:57,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:57,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 245 transitions, 4544 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:57,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:57,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:57,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:58,543 INFO L124 PetriNetUnfolderBase]: 3994/8247 cut-off events. [2025-02-08 08:33:58,544 INFO L125 PetriNetUnfolderBase]: For 42810/42810 co-relation queries the response was YES. [2025-02-08 08:33:58,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34970 conditions, 8247 events. 3994/8247 cut-off events. For 42810/42810 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 65462 event pairs, 377 based on Foata normal form. 110/8328 useless extension candidates. Maximal degree in co-relation 34923. Up to 3890 conditions per place. [2025-02-08 08:33:58,592 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 148 selfloop transitions, 156 changer transitions 4/319 dead transitions. [2025-02-08 08:33:58,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 319 transitions, 5791 flow [2025-02-08 08:33:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:33:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:33:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 308 transitions. [2025-02-08 08:33:58,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2025-02-08 08:33:58,594 INFO L175 Difference]: Start difference. First operand has 198 places, 245 transitions, 4544 flow. Second operand 10 states and 308 transitions. [2025-02-08 08:33:58,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 319 transitions, 5791 flow [2025-02-08 08:33:58,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 319 transitions, 5479 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-08 08:33:58,763 INFO L231 Difference]: Finished difference. Result has 200 places, 253 transitions, 4716 flow [2025-02-08 08:33:58,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4716, PETRI_PLACES=200, PETRI_TRANSITIONS=253} [2025-02-08 08:33:58,764 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 154 predicate places. [2025-02-08 08:33:58,764 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 253 transitions, 4716 flow [2025-02-08 08:33:58,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:58,764 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:58,764 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:58,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-02-08 08:33:58,764 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:33:58,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:58,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2128403004, now seen corresponding path program 3 times [2025-02-08 08:33:58,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:58,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535420945] [2025-02-08 08:33:58,765 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:33:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:58,769 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:33:58,773 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 28 statements. [2025-02-08 08:33:58,773 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:33:58,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:33:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:58,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535420945] [2025-02-08 08:33:58,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535420945] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:58,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:58,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:33:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754129501] [2025-02-08 08:33:58,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:58,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:33:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:58,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:33:58,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:33:59,126 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:33:59,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 253 transitions, 4716 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:33:59,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:59,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:33:59,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:00,022 INFO L124 PetriNetUnfolderBase]: 4174/8454 cut-off events. [2025-02-08 08:34:00,023 INFO L125 PetriNetUnfolderBase]: For 51265/51265 co-relation queries the response was YES. [2025-02-08 08:34:00,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37168 conditions, 8454 events. 4174/8454 cut-off events. For 51265/51265 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 66797 event pairs, 1422 based on Foata normal form. 45/8417 useless extension candidates. Maximal degree in co-relation 37121. Up to 5867 conditions per place. [2025-02-08 08:34:00,074 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 118 selfloop transitions, 152 changer transitions 12/293 dead transitions. [2025-02-08 08:34:00,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 293 transitions, 5666 flow [2025-02-08 08:34:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2025-02-08 08:34:00,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2025-02-08 08:34:00,079 INFO L175 Difference]: Start difference. First operand has 200 places, 253 transitions, 4716 flow. Second operand 9 states and 266 transitions. [2025-02-08 08:34:00,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 293 transitions, 5666 flow [2025-02-08 08:34:00,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 293 transitions, 5346 flow, removed 14 selfloop flow, removed 7 redundant places. [2025-02-08 08:34:00,295 INFO L231 Difference]: Finished difference. Result has 204 places, 263 transitions, 5004 flow [2025-02-08 08:34:00,295 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5004, PETRI_PLACES=204, PETRI_TRANSITIONS=263} [2025-02-08 08:34:00,295 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 158 predicate places. [2025-02-08 08:34:00,295 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 263 transitions, 5004 flow [2025-02-08 08:34:00,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:00,296 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:00,296 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:00,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2025-02-08 08:34:00,296 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:00,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2102379328, now seen corresponding path program 4 times [2025-02-08 08:34:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:00,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294842815] [2025-02-08 08:34:00,297 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:34:00,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:00,301 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-08 08:34:00,305 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:00,305 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:34:00,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294842815] [2025-02-08 08:34:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294842815] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:00,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:00,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:34:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049980415] [2025-02-08 08:34:00,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:00,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:34:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:00,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:34:00,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:34:00,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:00,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 263 transitions, 5004 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:00,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:00,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:00,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:01,339 INFO L124 PetriNetUnfolderBase]: 4039/8154 cut-off events. [2025-02-08 08:34:01,339 INFO L125 PetriNetUnfolderBase]: For 53302/53302 co-relation queries the response was YES. [2025-02-08 08:34:01,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37275 conditions, 8154 events. 4039/8154 cut-off events. For 53302/53302 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 64592 event pairs, 1327 based on Foata normal form. 45/8136 useless extension candidates. Maximal degree in co-relation 37226. Up to 5966 conditions per place. [2025-02-08 08:34:01,389 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 138 selfloop transitions, 173 changer transitions 7/329 dead transitions. [2025-02-08 08:34:01,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 329 transitions, 6720 flow [2025-02-08 08:34:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:34:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:34:01,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2025-02-08 08:34:01,390 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6328125 [2025-02-08 08:34:01,390 INFO L175 Difference]: Start difference. First operand has 204 places, 263 transitions, 5004 flow. Second operand 8 states and 243 transitions. [2025-02-08 08:34:01,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 329 transitions, 6720 flow [2025-02-08 08:34:01,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 329 transitions, 6387 flow, removed 11 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:01,622 INFO L231 Difference]: Finished difference. Result has 207 places, 297 transitions, 6060 flow [2025-02-08 08:34:01,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6060, PETRI_PLACES=207, PETRI_TRANSITIONS=297} [2025-02-08 08:34:01,622 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 161 predicate places. [2025-02-08 08:34:01,622 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 297 transitions, 6060 flow [2025-02-08 08:34:01,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:01,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:01,623 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:01,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-02-08 08:34:01,623 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:01,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:01,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1589396408, now seen corresponding path program 5 times [2025-02-08 08:34:01,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:01,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998827783] [2025-02-08 08:34:01,623 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:34:01,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:01,628 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:01,632 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:01,632 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:34:01,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:01,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:01,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998827783] [2025-02-08 08:34:01,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998827783] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:01,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:01,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:01,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137367072] [2025-02-08 08:34:01,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:01,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:01,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:01,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:01,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:01,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:01,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 297 transitions, 6060 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:01,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:01,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:01,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:02,971 INFO L124 PetriNetUnfolderBase]: 3976/8076 cut-off events. [2025-02-08 08:34:02,972 INFO L125 PetriNetUnfolderBase]: For 56390/56390 co-relation queries the response was YES. [2025-02-08 08:34:03,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37056 conditions, 8076 events. 3976/8076 cut-off events. For 56390/56390 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 64026 event pairs, 1319 based on Foata normal form. 45/8060 useless extension candidates. Maximal degree in co-relation 37007. Up to 5966 conditions per place. [2025-02-08 08:34:03,033 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 125 selfloop transitions, 180 changer transitions 7/323 dead transitions. [2025-02-08 08:34:03,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 323 transitions, 6851 flow [2025-02-08 08:34:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2025-02-08 08:34:03,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2025-02-08 08:34:03,034 INFO L175 Difference]: Start difference. First operand has 207 places, 297 transitions, 6060 flow. Second operand 9 states and 264 transitions. [2025-02-08 08:34:03,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 323 transitions, 6851 flow [2025-02-08 08:34:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 323 transitions, 6508 flow, removed 12 selfloop flow, removed 4 redundant places. [2025-02-08 08:34:03,277 INFO L231 Difference]: Finished difference. Result has 212 places, 298 transitions, 6164 flow [2025-02-08 08:34:03,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5729, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6164, PETRI_PLACES=212, PETRI_TRANSITIONS=298} [2025-02-08 08:34:03,277 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 166 predicate places. [2025-02-08 08:34:03,278 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 298 transitions, 6164 flow [2025-02-08 08:34:03,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:03,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:03,278 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:03,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2025-02-08 08:34:03,278 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:03,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash 31947048, now seen corresponding path program 4 times [2025-02-08 08:34:03,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:03,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603867699] [2025-02-08 08:34:03,279 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:34:03,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:03,284 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-08 08:34:03,289 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:03,289 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:34:03,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:03,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:03,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603867699] [2025-02-08 08:34:03,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603867699] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:03,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:03,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:34:03,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654891568] [2025-02-08 08:34:03,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:03,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:34:03,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:03,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:34:03,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:34:03,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:03,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 298 transitions, 6164 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:03,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:03,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:03,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:04,421 INFO L124 PetriNetUnfolderBase]: 3895/7877 cut-off events. [2025-02-08 08:34:04,421 INFO L125 PetriNetUnfolderBase]: For 56778/56778 co-relation queries the response was YES. [2025-02-08 08:34:04,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36312 conditions, 7877 events. 3895/7877 cut-off events. For 56778/56778 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 61988 event pairs, 1396 based on Foata normal form. 36/7860 useless extension candidates. Maximal degree in co-relation 36262. Up to 5966 conditions per place. [2025-02-08 08:34:04,478 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 134 selfloop transitions, 175 changer transitions 3/323 dead transitions. [2025-02-08 08:34:04,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 323 transitions, 6930 flow [2025-02-08 08:34:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:34:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:34:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2025-02-08 08:34:04,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6223958333333334 [2025-02-08 08:34:04,479 INFO L175 Difference]: Start difference. First operand has 212 places, 298 transitions, 6164 flow. Second operand 8 states and 239 transitions. [2025-02-08 08:34:04,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 323 transitions, 6930 flow [2025-02-08 08:34:04,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 323 transitions, 6526 flow, removed 13 selfloop flow, removed 9 redundant places. [2025-02-08 08:34:04,685 INFO L231 Difference]: Finished difference. Result has 210 places, 299 transitions, 6144 flow [2025-02-08 08:34:04,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5768, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6144, PETRI_PLACES=210, PETRI_TRANSITIONS=299} [2025-02-08 08:34:04,686 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 164 predicate places. [2025-02-08 08:34:04,686 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 299 transitions, 6144 flow [2025-02-08 08:34:04,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:04,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:04,686 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:04,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2025-02-08 08:34:04,686 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:04,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:04,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1613520450, now seen corresponding path program 5 times [2025-02-08 08:34:04,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:04,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812220039] [2025-02-08 08:34:04,687 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:34:04,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:04,691 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:04,695 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:04,697 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:34:04,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:04,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:04,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812220039] [2025-02-08 08:34:04,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812220039] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:04,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:04,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:04,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339490158] [2025-02-08 08:34:04,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:04,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:04,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:04,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:04,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:05,057 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:05,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 299 transitions, 6144 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:05,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:05,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:05,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:05,943 INFO L124 PetriNetUnfolderBase]: 4017/8064 cut-off events. [2025-02-08 08:34:05,943 INFO L125 PetriNetUnfolderBase]: For 54073/54073 co-relation queries the response was YES. [2025-02-08 08:34:05,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37169 conditions, 8064 events. 4017/8064 cut-off events. For 54073/54073 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 63444 event pairs, 1465 based on Foata normal form. 110/8119 useless extension candidates. Maximal degree in co-relation 37121. Up to 6058 conditions per place. [2025-02-08 08:34:06,003 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 137 selfloop transitions, 190 changer transitions 0/338 dead transitions. [2025-02-08 08:34:06,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 338 transitions, 7120 flow [2025-02-08 08:34:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2025-02-08 08:34:06,004 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2025-02-08 08:34:06,004 INFO L175 Difference]: Start difference. First operand has 210 places, 299 transitions, 6144 flow. Second operand 9 states and 266 transitions. [2025-02-08 08:34:06,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 338 transitions, 7120 flow [2025-02-08 08:34:06,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 338 transitions, 6774 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:34:06,214 INFO L231 Difference]: Finished difference. Result has 213 places, 305 transitions, 6316 flow [2025-02-08 08:34:06,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6316, PETRI_PLACES=213, PETRI_TRANSITIONS=305} [2025-02-08 08:34:06,215 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 167 predicate places. [2025-02-08 08:34:06,215 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 305 transitions, 6316 flow [2025-02-08 08:34:06,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:06,215 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:06,216 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:06,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2025-02-08 08:34:06,216 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:06,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:06,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1290364382, now seen corresponding path program 6 times [2025-02-08 08:34:06,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:06,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255557554] [2025-02-08 08:34:06,216 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:34:06,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:06,223 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:06,237 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:06,240 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:34:06,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:06,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:06,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255557554] [2025-02-08 08:34:06,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255557554] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:06,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:06,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:06,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916191380] [2025-02-08 08:34:06,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:06,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:06,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:06,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:06,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:06,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:06,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 305 transitions, 6316 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:06,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:06,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:06,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:07,679 INFO L124 PetriNetUnfolderBase]: 4297/8646 cut-off events. [2025-02-08 08:34:07,679 INFO L125 PetriNetUnfolderBase]: For 61668/61668 co-relation queries the response was YES. [2025-02-08 08:34:07,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40590 conditions, 8646 events. 4297/8646 cut-off events. For 61668/61668 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 69212 event pairs, 1306 based on Foata normal form. 110/8695 useless extension candidates. Maximal degree in co-relation 40541. Up to 6150 conditions per place. [2025-02-08 08:34:07,747 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 150 selfloop transitions, 196 changer transitions 0/357 dead transitions. [2025-02-08 08:34:07,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 357 transitions, 7463 flow [2025-02-08 08:34:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2025-02-08 08:34:07,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2025-02-08 08:34:07,750 INFO L175 Difference]: Start difference. First operand has 213 places, 305 transitions, 6316 flow. Second operand 9 states and 273 transitions. [2025-02-08 08:34:07,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 357 transitions, 7463 flow [2025-02-08 08:34:07,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 357 transitions, 7242 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:34:07,997 INFO L231 Difference]: Finished difference. Result has 219 places, 313 transitions, 6681 flow [2025-02-08 08:34:07,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6095, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6681, PETRI_PLACES=219, PETRI_TRANSITIONS=313} [2025-02-08 08:34:08,000 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 173 predicate places. [2025-02-08 08:34:08,000 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 313 transitions, 6681 flow [2025-02-08 08:34:08,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:08,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:08,000 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:08,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2025-02-08 08:34:08,000 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:08,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash -924548956, now seen corresponding path program 6 times [2025-02-08 08:34:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807405746] [2025-02-08 08:34:08,000 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:34:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:08,005 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:08,010 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:08,010 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:34:08,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:08,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:08,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807405746] [2025-02-08 08:34:08,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807405746] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:08,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632424847] [2025-02-08 08:34:08,171 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:34:08,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:08,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:08,176 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:34:08,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-08 08:34:08,225 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:08,255 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:08,255 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:34:08,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:08,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 08:34:08,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:08,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:34:08,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2025-02-08 08:34:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:08,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:08,545 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-08 08:34:08,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-02-08 08:34:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:08,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632424847] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:08,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:34:08,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 21 [2025-02-08 08:34:08,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696232083] [2025-02-08 08:34:08,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:08,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:34:08,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:08,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:34:08,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:34:08,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:08,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 313 transitions, 6681 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:08,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:08,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:08,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:09,913 INFO L124 PetriNetUnfolderBase]: 4648/9529 cut-off events. [2025-02-08 08:34:09,913 INFO L125 PetriNetUnfolderBase]: For 72642/72642 co-relation queries the response was YES. [2025-02-08 08:34:09,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45208 conditions, 9529 events. 4648/9529 cut-off events. For 72642/72642 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 78789 event pairs, 1264 based on Foata normal form. 100/9566 useless extension candidates. Maximal degree in co-relation 45157. Up to 6753 conditions per place. [2025-02-08 08:34:09,978 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 166 selfloop transitions, 184 changer transitions 0/361 dead transitions. [2025-02-08 08:34:09,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 361 transitions, 7756 flow [2025-02-08 08:34:09,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:34:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:34:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 297 transitions. [2025-02-08 08:34:09,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.61875 [2025-02-08 08:34:09,980 INFO L175 Difference]: Start difference. First operand has 219 places, 313 transitions, 6681 flow. Second operand 10 states and 297 transitions. [2025-02-08 08:34:09,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 361 transitions, 7756 flow [2025-02-08 08:34:10,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 361 transitions, 7374 flow, removed 12 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:10,253 INFO L231 Difference]: Finished difference. Result has 223 places, 322 transitions, 6873 flow [2025-02-08 08:34:10,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6299, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6873, PETRI_PLACES=223, PETRI_TRANSITIONS=322} [2025-02-08 08:34:10,254 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 177 predicate places. [2025-02-08 08:34:10,254 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 322 transitions, 6873 flow [2025-02-08 08:34:10,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:10,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:10,254 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:10,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-08 08:34:10,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:10,459 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:10,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2080380108, now seen corresponding path program 7 times [2025-02-08 08:34:10,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:10,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284059008] [2025-02-08 08:34:10,460 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:34:10,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:10,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 08:34:10,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:10,471 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:10,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:10,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:10,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284059008] [2025-02-08 08:34:10,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284059008] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:10,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:10,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:10,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919675473] [2025-02-08 08:34:10,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:10,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:10,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:10,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:10,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:10,803 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:10,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 322 transitions, 6873 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:10,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:10,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:10,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:11,852 INFO L124 PetriNetUnfolderBase]: 4388/8910 cut-off events. [2025-02-08 08:34:11,852 INFO L125 PetriNetUnfolderBase]: For 72605/72605 co-relation queries the response was YES. [2025-02-08 08:34:11,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43005 conditions, 8910 events. 4388/8910 cut-off events. For 72605/72605 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 72356 event pairs, 1378 based on Foata normal form. 45/8894 useless extension candidates. Maximal degree in co-relation 42953. Up to 6907 conditions per place. [2025-02-08 08:34:11,906 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 148 selfloop transitions, 177 changer transitions 4/340 dead transitions. [2025-02-08 08:34:11,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 340 transitions, 7486 flow [2025-02-08 08:34:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2025-02-08 08:34:11,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-02-08 08:34:11,907 INFO L175 Difference]: Start difference. First operand has 223 places, 322 transitions, 6873 flow. Second operand 9 states and 261 transitions. [2025-02-08 08:34:11,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 340 transitions, 7486 flow [2025-02-08 08:34:12,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 340 transitions, 7146 flow, removed 9 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:12,170 INFO L231 Difference]: Finished difference. Result has 225 places, 315 transitions, 6714 flow [2025-02-08 08:34:12,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6714, PETRI_PLACES=225, PETRI_TRANSITIONS=315} [2025-02-08 08:34:12,171 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 179 predicate places. [2025-02-08 08:34:12,171 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 315 transitions, 6714 flow [2025-02-08 08:34:12,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:12,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:12,172 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:12,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2025-02-08 08:34:12,172 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:12,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2111506122, now seen corresponding path program 7 times [2025-02-08 08:34:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:12,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992561853] [2025-02-08 08:34:12,172 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:34:12,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:12,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 08:34:12,180 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:12,180 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:12,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:12,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:12,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992561853] [2025-02-08 08:34:12,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992561853] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:12,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:12,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:12,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116590976] [2025-02-08 08:34:12,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:12,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:12,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:12,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:12,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:12,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:12,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 315 transitions, 6714 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:12,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:12,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:12,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:13,571 INFO L124 PetriNetUnfolderBase]: 4573/9211 cut-off events. [2025-02-08 08:34:13,571 INFO L125 PetriNetUnfolderBase]: For 79393/79393 co-relation queries the response was YES. [2025-02-08 08:34:13,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45223 conditions, 9211 events. 4573/9211 cut-off events. For 79393/79393 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 74508 event pairs, 1411 based on Foata normal form. 110/9258 useless extension candidates. Maximal degree in co-relation 45171. Up to 7035 conditions per place. [2025-02-08 08:34:13,652 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 156 selfloop transitions, 199 changer transitions 0/366 dead transitions. [2025-02-08 08:34:13,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 366 transitions, 8240 flow [2025-02-08 08:34:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2025-02-08 08:34:13,653 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2025-02-08 08:34:13,653 INFO L175 Difference]: Start difference. First operand has 225 places, 315 transitions, 6714 flow. Second operand 9 states and 266 transitions. [2025-02-08 08:34:13,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 366 transitions, 8240 flow [2025-02-08 08:34:14,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 366 transitions, 7833 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-08 08:34:14,021 INFO L231 Difference]: Finished difference. Result has 224 places, 340 transitions, 7442 flow [2025-02-08 08:34:14,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7442, PETRI_PLACES=224, PETRI_TRANSITIONS=340} [2025-02-08 08:34:14,021 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 178 predicate places. [2025-02-08 08:34:14,021 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 340 transitions, 7442 flow [2025-02-08 08:34:14,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:14,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:14,022 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:14,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2025-02-08 08:34:14,022 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:14,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash -158076110, now seen corresponding path program 8 times [2025-02-08 08:34:14,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:14,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484105329] [2025-02-08 08:34:14,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:34:14,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:14,027 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 08:34:14,034 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:14,034 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:34:14,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:14,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:14,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484105329] [2025-02-08 08:34:14,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484105329] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:14,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:14,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:34:14,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650571111] [2025-02-08 08:34:14,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:14,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:34:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:14,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:34:14,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:34:14,208 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:14,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 340 transitions, 7442 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:14,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:14,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:14,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:15,247 INFO L124 PetriNetUnfolderBase]: 4713/9476 cut-off events. [2025-02-08 08:34:15,247 INFO L125 PetriNetUnfolderBase]: For 89249/89249 co-relation queries the response was YES. [2025-02-08 08:34:15,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47750 conditions, 9476 events. 4713/9476 cut-off events. For 89249/89249 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 76975 event pairs, 1503 based on Foata normal form. 110/9525 useless extension candidates. Maximal degree in co-relation 47696. Up to 7285 conditions per place. [2025-02-08 08:34:15,335 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 173 selfloop transitions, 190 changer transitions 0/374 dead transitions. [2025-02-08 08:34:15,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 374 transitions, 8502 flow [2025-02-08 08:34:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:34:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:34:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2025-02-08 08:34:15,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6380208333333334 [2025-02-08 08:34:15,336 INFO L175 Difference]: Start difference. First operand has 224 places, 340 transitions, 7442 flow. Second operand 8 states and 245 transitions. [2025-02-08 08:34:15,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 374 transitions, 8502 flow [2025-02-08 08:34:15,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 374 transitions, 8095 flow, removed 12 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:15,749 INFO L231 Difference]: Finished difference. Result has 227 places, 348 transitions, 7658 flow [2025-02-08 08:34:15,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7658, PETRI_PLACES=227, PETRI_TRANSITIONS=348} [2025-02-08 08:34:15,750 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 181 predicate places. [2025-02-08 08:34:15,750 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 348 transitions, 7658 flow [2025-02-08 08:34:15,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:15,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:15,750 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:15,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2025-02-08 08:34:15,750 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:15,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1363270156, now seen corresponding path program 9 times [2025-02-08 08:34:15,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:15,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371445463] [2025-02-08 08:34:15,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:34:15,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:15,755 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:15,758 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 28 statements. [2025-02-08 08:34:15,758 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:34:15,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:15,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:15,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371445463] [2025-02-08 08:34:15,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371445463] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:15,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:15,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:34:15,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672305469] [2025-02-08 08:34:15,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:15,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:34:15,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:15,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:34:15,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:34:15,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:15,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 348 transitions, 7658 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:15,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:15,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:15,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:17,180 INFO L124 PetriNetUnfolderBase]: 4713/9514 cut-off events. [2025-02-08 08:34:17,180 INFO L125 PetriNetUnfolderBase]: For 91952/91952 co-relation queries the response was YES. [2025-02-08 08:34:17,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48283 conditions, 9514 events. 4713/9514 cut-off events. For 91952/91952 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 77681 event pairs, 1501 based on Foata normal form. 36/9487 useless extension candidates. Maximal degree in co-relation 48227. Up to 7443 conditions per place. [2025-02-08 08:34:17,252 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 165 selfloop transitions, 185 changer transitions 3/364 dead transitions. [2025-02-08 08:34:17,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 364 transitions, 8420 flow [2025-02-08 08:34:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:34:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:34:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2025-02-08 08:34:17,252 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6197916666666666 [2025-02-08 08:34:17,252 INFO L175 Difference]: Start difference. First operand has 227 places, 348 transitions, 7658 flow. Second operand 8 states and 238 transitions. [2025-02-08 08:34:17,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 364 transitions, 8420 flow [2025-02-08 08:34:17,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 364 transitions, 8019 flow, removed 20 selfloop flow, removed 5 redundant places. [2025-02-08 08:34:17,647 INFO L231 Difference]: Finished difference. Result has 229 places, 347 transitions, 7616 flow [2025-02-08 08:34:17,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7257, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7616, PETRI_PLACES=229, PETRI_TRANSITIONS=347} [2025-02-08 08:34:17,648 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 183 predicate places. [2025-02-08 08:34:17,648 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 347 transitions, 7616 flow [2025-02-08 08:34:17,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:17,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:17,648 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:17,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2025-02-08 08:34:17,649 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:17,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1040374662, now seen corresponding path program 10 times [2025-02-08 08:34:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:17,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200819795] [2025-02-08 08:34:17,649 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:34:17,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:17,653 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-08 08:34:17,656 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:17,656 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:34:17,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:17,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200819795] [2025-02-08 08:34:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200819795] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:17,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:17,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:34:17,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988648051] [2025-02-08 08:34:17,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:17,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:34:17,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:17,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:34:17,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:34:17,838 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:17,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 347 transitions, 7616 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:17,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:17,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:17,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:18,938 INFO L124 PetriNetUnfolderBase]: 4659/9398 cut-off events. [2025-02-08 08:34:18,938 INFO L125 PetriNetUnfolderBase]: For 85615/85615 co-relation queries the response was YES. [2025-02-08 08:34:18,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47035 conditions, 9398 events. 4659/9398 cut-off events. For 85615/85615 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 76566 event pairs, 1593 based on Foata normal form. 36/9379 useless extension candidates. Maximal degree in co-relation 46979. Up to 7407 conditions per place. [2025-02-08 08:34:19,005 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 167 selfloop transitions, 173 changer transitions 3/354 dead transitions. [2025-02-08 08:34:19,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 354 transitions, 8112 flow [2025-02-08 08:34:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:34:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:34:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2025-02-08 08:34:19,006 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6197916666666666 [2025-02-08 08:34:19,006 INFO L175 Difference]: Start difference. First operand has 229 places, 347 transitions, 7616 flow. Second operand 8 states and 238 transitions. [2025-02-08 08:34:19,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 354 transitions, 8112 flow [2025-02-08 08:34:19,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 354 transitions, 7788 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:34:19,329 INFO L231 Difference]: Finished difference. Result has 230 places, 337 transitions, 7381 flow [2025-02-08 08:34:19,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7046, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7381, PETRI_PLACES=230, PETRI_TRANSITIONS=337} [2025-02-08 08:34:19,329 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 184 predicate places. [2025-02-08 08:34:19,329 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 337 transitions, 7381 flow [2025-02-08 08:34:19,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:19,330 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:19,330 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:19,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2025-02-08 08:34:19,330 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:19,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:19,330 INFO L85 PathProgramCache]: Analyzing trace with hash 218042672, now seen corresponding path program 11 times [2025-02-08 08:34:19,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:19,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827096839] [2025-02-08 08:34:19,331 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:34:19,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:19,335 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:19,340 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:19,340 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:34:19,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:19,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:19,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827096839] [2025-02-08 08:34:19,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827096839] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:19,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:19,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:19,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085524155] [2025-02-08 08:34:19,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:19,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:19,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:19,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:19,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:19,829 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:19,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 337 transitions, 7381 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:19,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:19,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:19,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:21,036 INFO L124 PetriNetUnfolderBase]: 4921/9909 cut-off events. [2025-02-08 08:34:21,036 INFO L125 PetriNetUnfolderBase]: For 95320/95320 co-relation queries the response was YES. [2025-02-08 08:34:21,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49967 conditions, 9909 events. 4921/9909 cut-off events. For 95320/95320 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 81490 event pairs, 1413 based on Foata normal form. 110/9956 useless extension candidates. Maximal degree in co-relation 49911. Up to 7183 conditions per place. [2025-02-08 08:34:21,108 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 171 selfloop transitions, 200 changer transitions 0/382 dead transitions. [2025-02-08 08:34:21,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 382 transitions, 8563 flow [2025-02-08 08:34:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 270 transitions. [2025-02-08 08:34:21,109 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-08 08:34:21,109 INFO L175 Difference]: Start difference. First operand has 230 places, 337 transitions, 7381 flow. Second operand 9 states and 270 transitions. [2025-02-08 08:34:21,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 382 transitions, 8563 flow [2025-02-08 08:34:21,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 382 transitions, 8363 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:34:21,543 INFO L231 Difference]: Finished difference. Result has 235 places, 345 transitions, 7830 flow [2025-02-08 08:34:21,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7830, PETRI_PLACES=235, PETRI_TRANSITIONS=345} [2025-02-08 08:34:21,544 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 189 predicate places. [2025-02-08 08:34:21,544 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 345 transitions, 7830 flow [2025-02-08 08:34:21,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:21,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:21,544 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:21,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2025-02-08 08:34:21,544 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:21,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1005707094, now seen corresponding path program 8 times [2025-02-08 08:34:21,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:21,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837576481] [2025-02-08 08:34:21,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:34:21,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:21,549 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 08:34:21,553 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:21,553 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:34:21,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:21,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:21,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837576481] [2025-02-08 08:34:21,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837576481] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:21,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:21,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:21,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251493258] [2025-02-08 08:34:21,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:21,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:21,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:21,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:21,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:21,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:21,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 345 transitions, 7830 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:21,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:21,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:21,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:23,184 INFO L124 PetriNetUnfolderBase]: 4921/9980 cut-off events. [2025-02-08 08:34:23,184 INFO L125 PetriNetUnfolderBase]: For 108699/108699 co-relation queries the response was YES. [2025-02-08 08:34:23,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51756 conditions, 9980 events. 4921/9980 cut-off events. For 108699/108699 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 82484 event pairs, 1506 based on Foata normal form. 45/9968 useless extension candidates. Maximal degree in co-relation 51698. Up to 7907 conditions per place. [2025-02-08 08:34:23,261 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 166 selfloop transitions, 181 changer transitions 4/362 dead transitions. [2025-02-08 08:34:23,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 362 transitions, 8591 flow [2025-02-08 08:34:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2025-02-08 08:34:23,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2025-02-08 08:34:23,262 INFO L175 Difference]: Start difference. First operand has 235 places, 345 transitions, 7830 flow. Second operand 9 states and 260 transitions. [2025-02-08 08:34:23,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 362 transitions, 8591 flow [2025-02-08 08:34:23,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 362 transitions, 8065 flow, removed 32 selfloop flow, removed 7 redundant places. [2025-02-08 08:34:23,742 INFO L231 Difference]: Finished difference. Result has 236 places, 344 transitions, 7657 flow [2025-02-08 08:34:23,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7304, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7657, PETRI_PLACES=236, PETRI_TRANSITIONS=344} [2025-02-08 08:34:23,742 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 190 predicate places. [2025-02-08 08:34:23,742 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 344 transitions, 7657 flow [2025-02-08 08:34:23,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:23,743 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:23,743 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:23,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2025-02-08 08:34:23,743 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:23,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:23,743 INFO L85 PathProgramCache]: Analyzing trace with hash 595607060, now seen corresponding path program 9 times [2025-02-08 08:34:23,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:23,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942569547] [2025-02-08 08:34:23,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:34:23,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:23,748 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:23,752 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 28 statements. [2025-02-08 08:34:23,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:34:23,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:23,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942569547] [2025-02-08 08:34:23,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942569547] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:23,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:23,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:23,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072929815] [2025-02-08 08:34:23,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:23,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:23,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:23,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:23,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:24,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:24,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 344 transitions, 7657 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:24,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:24,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:24,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:25,486 INFO L124 PetriNetUnfolderBase]: 5039/10197 cut-off events. [2025-02-08 08:34:25,486 INFO L125 PetriNetUnfolderBase]: For 103321/103321 co-relation queries the response was YES. [2025-02-08 08:34:25,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51956 conditions, 10197 events. 5039/10197 cut-off events. For 103321/103321 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 84394 event pairs, 1500 based on Foata normal form. 100/10234 useless extension candidates. Maximal degree in co-relation 51898. Up to 7989 conditions per place. [2025-02-08 08:34:25,557 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 176 selfloop transitions, 190 changer transitions 0/377 dead transitions. [2025-02-08 08:34:25,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 377 transitions, 8710 flow [2025-02-08 08:34:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2025-02-08 08:34:25,557 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6087962962962963 [2025-02-08 08:34:25,558 INFO L175 Difference]: Start difference. First operand has 236 places, 344 transitions, 7657 flow. Second operand 9 states and 263 transitions. [2025-02-08 08:34:25,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 377 transitions, 8710 flow [2025-02-08 08:34:25,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 377 transitions, 8271 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-08 08:34:25,975 INFO L231 Difference]: Finished difference. Result has 236 places, 353 transitions, 7816 flow [2025-02-08 08:34:25,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7218, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7816, PETRI_PLACES=236, PETRI_TRANSITIONS=353} [2025-02-08 08:34:25,976 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 190 predicate places. [2025-02-08 08:34:25,976 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 353 transitions, 7816 flow [2025-02-08 08:34:25,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:25,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:25,976 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:25,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2025-02-08 08:34:25,976 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:25,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1019677970, now seen corresponding path program 10 times [2025-02-08 08:34:25,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:25,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855303332] [2025-02-08 08:34:25,977 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:34:25,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:25,980 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-08 08:34:25,983 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:25,983 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:34:25,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:26,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855303332] [2025-02-08 08:34:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855303332] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:26,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:26,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:34:26,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38975396] [2025-02-08 08:34:26,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:26,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:34:26,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:26,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:34:26,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:34:26,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:26,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 353 transitions, 7816 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:26,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:26,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:27,420 INFO L124 PetriNetUnfolderBase]: 4994/10125 cut-off events. [2025-02-08 08:34:27,421 INFO L125 PetriNetUnfolderBase]: For 103557/103557 co-relation queries the response was YES. [2025-02-08 08:34:27,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51816 conditions, 10125 events. 4994/10125 cut-off events. For 103557/103557 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 83981 event pairs, 1567 based on Foata normal form. 45/10133 useless extension candidates. Maximal degree in co-relation 51757. Up to 8098 conditions per place. [2025-02-08 08:34:27,675 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 182 selfloop transitions, 167 changer transitions 4/364 dead transitions. [2025-02-08 08:34:27,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 364 transitions, 8424 flow [2025-02-08 08:34:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:34:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:34:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2025-02-08 08:34:27,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-02-08 08:34:27,677 INFO L175 Difference]: Start difference. First operand has 236 places, 353 transitions, 7816 flow. Second operand 8 states and 236 transitions. [2025-02-08 08:34:27,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 364 transitions, 8424 flow [2025-02-08 08:34:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 364 transitions, 8035 flow, removed 18 selfloop flow, removed 7 redundant places. [2025-02-08 08:34:28,141 INFO L231 Difference]: Finished difference. Result has 236 places, 346 transitions, 7594 flow [2025-02-08 08:34:28,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7270, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7594, PETRI_PLACES=236, PETRI_TRANSITIONS=346} [2025-02-08 08:34:28,142 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 190 predicate places. [2025-02-08 08:34:28,142 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 346 transitions, 7594 flow [2025-02-08 08:34:28,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:28,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:28,142 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:28,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2025-02-08 08:34:28,143 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:28,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:28,143 INFO L85 PathProgramCache]: Analyzing trace with hash 403410952, now seen corresponding path program 11 times [2025-02-08 08:34:28,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:28,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137608540] [2025-02-08 08:34:28,144 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:34:28,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:28,148 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:28,152 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:28,153 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:34:28,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:28,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137608540] [2025-02-08 08:34:28,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137608540] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153957238] [2025-02-08 08:34:28,351 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:34:28,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:28,353 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:34:28,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-08 08:34:28,407 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:28,424 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:28,424 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:34:28,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:28,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 08:34:28,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:28,613 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-08 08:34:28,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-02-08 08:34:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:28,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:28,734 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-08 08:34:28,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-02-08 08:34:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:28,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153957238] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:28,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:28,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2025-02-08 08:34:28,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55558937] [2025-02-08 08:34:28,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:28,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:34:28,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:28,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:34:28,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:34:29,185 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:29,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 346 transitions, 7594 flow. Second operand has 22 states, 22 states have (on average 24.454545454545453) internal successors, (538), 22 states have internal predecessors, (538), 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 08:34:29,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:29,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:29,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:30,667 INFO L124 PetriNetUnfolderBase]: 5484/10902 cut-off events. [2025-02-08 08:34:30,667 INFO L125 PetriNetUnfolderBase]: For 108729/108729 co-relation queries the response was YES. [2025-02-08 08:34:30,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56260 conditions, 10902 events. 5484/10902 cut-off events. For 108729/108729 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 89405 event pairs, 1432 based on Foata normal form. 100/10965 useless extension candidates. Maximal degree in co-relation 56201. Up to 8054 conditions per place. [2025-02-08 08:34:30,746 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 176 selfloop transitions, 213 changer transitions 0/400 dead transitions. [2025-02-08 08:34:30,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 400 transitions, 9021 flow [2025-02-08 08:34:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2025-02-08 08:34:30,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2025-02-08 08:34:30,747 INFO L175 Difference]: Start difference. First operand has 236 places, 346 transitions, 7594 flow. Second operand 9 states and 267 transitions. [2025-02-08 08:34:30,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 400 transitions, 9021 flow [2025-02-08 08:34:31,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 400 transitions, 8687 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:31,217 INFO L231 Difference]: Finished difference. Result has 238 places, 367 transitions, 8204 flow [2025-02-08 08:34:31,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7260, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8204, PETRI_PLACES=238, PETRI_TRANSITIONS=367} [2025-02-08 08:34:31,218 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 192 predicate places. [2025-02-08 08:34:31,218 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 367 transitions, 8204 flow [2025-02-08 08:34:31,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.454545454545453) internal successors, (538), 22 states have internal predecessors, (538), 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 08:34:31,218 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:31,218 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:31,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-02-08 08:34:31,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:31,423 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:31,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash 815567318, now seen corresponding path program 12 times [2025-02-08 08:34:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:31,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159230013] [2025-02-08 08:34:31,424 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:34:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:31,429 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:31,435 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:31,435 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:34:31,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:31,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:31,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159230013] [2025-02-08 08:34:31,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159230013] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:31,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:31,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:31,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544759328] [2025-02-08 08:34:31,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:31,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:31,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:31,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:31,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:31,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:31,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 367 transitions, 8204 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:31,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:31,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:31,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:33,710 INFO L124 PetriNetUnfolderBase]: 5384/10874 cut-off events. [2025-02-08 08:34:33,711 INFO L125 PetriNetUnfolderBase]: For 118293/118293 co-relation queries the response was YES. [2025-02-08 08:34:33,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57912 conditions, 10874 events. 5384/10874 cut-off events. For 118293/118293 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 90981 event pairs, 1577 based on Foata normal form. 100/10917 useless extension candidates. Maximal degree in co-relation 57851. Up to 8652 conditions per place. [2025-02-08 08:34:33,781 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 194 selfloop transitions, 185 changer transitions 0/390 dead transitions. [2025-02-08 08:34:33,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 390 transitions, 9089 flow [2025-02-08 08:34:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2025-02-08 08:34:33,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-02-08 08:34:33,783 INFO L175 Difference]: Start difference. First operand has 238 places, 367 transitions, 8204 flow. Second operand 9 states and 261 transitions. [2025-02-08 08:34:33,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 390 transitions, 9089 flow [2025-02-08 08:34:34,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 390 transitions, 8647 flow, removed 47 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:34,277 INFO L231 Difference]: Finished difference. Result has 240 places, 366 transitions, 8121 flow [2025-02-08 08:34:34,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8121, PETRI_PLACES=240, PETRI_TRANSITIONS=366} [2025-02-08 08:34:34,277 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 194 predicate places. [2025-02-08 08:34:34,277 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 366 transitions, 8121 flow [2025-02-08 08:34:34,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:34,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:34,277 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:34,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2025-02-08 08:34:34,278 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:34,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:34,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1669882240, now seen corresponding path program 12 times [2025-02-08 08:34:34,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:34,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804817929] [2025-02-08 08:34:34,278 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:34:34,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:34,282 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-02-08 08:34:34,286 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:34,286 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:34:34,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:34,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:34,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804817929] [2025-02-08 08:34:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804817929] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:34,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:34,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44903155] [2025-02-08 08:34:34,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:34,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:34,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:34,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:34,583 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:34,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 366 transitions, 8121 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:34,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:34,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:34,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:35,989 INFO L124 PetriNetUnfolderBase]: 5456/11085 cut-off events. [2025-02-08 08:34:35,990 INFO L125 PetriNetUnfolderBase]: For 119851/119995 co-relation queries the response was YES. [2025-02-08 08:34:36,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58586 conditions, 11085 events. 5456/11085 cut-off events. For 119851/119995 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 93464 event pairs, 1584 based on Foata normal form. 36/11040 useless extension candidates. Maximal degree in co-relation 58525. Up to 8842 conditions per place. [2025-02-08 08:34:36,101 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 189 selfloop transitions, 187 changer transitions 8/395 dead transitions. [2025-02-08 08:34:36,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 395 transitions, 9250 flow [2025-02-08 08:34:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 259 transitions. [2025-02-08 08:34:36,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5995370370370371 [2025-02-08 08:34:36,102 INFO L175 Difference]: Start difference. First operand has 240 places, 366 transitions, 8121 flow. Second operand 9 states and 259 transitions. [2025-02-08 08:34:36,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 395 transitions, 9250 flow [2025-02-08 08:34:36,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 395 transitions, 8839 flow, removed 18 selfloop flow, removed 7 redundant places. [2025-02-08 08:34:36,652 INFO L231 Difference]: Finished difference. Result has 242 places, 374 transitions, 8339 flow [2025-02-08 08:34:36,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7730, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8339, PETRI_PLACES=242, PETRI_TRANSITIONS=374} [2025-02-08 08:34:36,652 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 196 predicate places. [2025-02-08 08:34:36,653 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 374 transitions, 8339 flow [2025-02-08 08:34:36,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:36,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:36,653 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:36,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2025-02-08 08:34:36,653 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:36,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:36,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1103568570, now seen corresponding path program 13 times [2025-02-08 08:34:36,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:36,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915640800] [2025-02-08 08:34:36,654 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:34:36,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:36,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 08:34:36,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:36,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:36,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:36,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:36,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915640800] [2025-02-08 08:34:36,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915640800] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:36,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:36,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:34:36,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874899277] [2025-02-08 08:34:36,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:36,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:36,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:36,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:36,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:34:37,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:37,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 374 transitions, 8339 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:37,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:37,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:37,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:38,429 INFO L124 PetriNetUnfolderBase]: 5402/10968 cut-off events. [2025-02-08 08:34:38,429 INFO L125 PetriNetUnfolderBase]: For 116973/117117 co-relation queries the response was YES. [2025-02-08 08:34:38,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57837 conditions, 10968 events. 5402/10968 cut-off events. For 116973/117117 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 92618 event pairs, 1557 based on Foata normal form. 36/10925 useless extension candidates. Maximal degree in co-relation 57775. Up to 8842 conditions per place. [2025-02-08 08:34:38,525 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 195 selfloop transitions, 182 changer transitions 6/394 dead transitions. [2025-02-08 08:34:38,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 394 transitions, 9246 flow [2025-02-08 08:34:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:34:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:34:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2025-02-08 08:34:38,526 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2025-02-08 08:34:38,526 INFO L175 Difference]: Start difference. First operand has 242 places, 374 transitions, 8339 flow. Second operand 9 states and 258 transitions. [2025-02-08 08:34:38,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 394 transitions, 9246 flow [2025-02-08 08:34:39,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 394 transitions, 8895 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:39,049 INFO L231 Difference]: Finished difference. Result has 245 places, 375 transitions, 8430 flow [2025-02-08 08:34:39,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7996, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8430, PETRI_PLACES=245, PETRI_TRANSITIONS=375} [2025-02-08 08:34:39,050 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 199 predicate places. [2025-02-08 08:34:39,050 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 375 transitions, 8430 flow [2025-02-08 08:34:39,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 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 08:34:39,050 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:39,050 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:39,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2025-02-08 08:34:39,050 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-08 08:34:39,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:39,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1724660426, now seen corresponding path program 14 times [2025-02-08 08:34:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:39,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065732262] [2025-02-08 08:34:39,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:34:39,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:39,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-08 08:34:39,059 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:34:39,059 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:34:39,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:39,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:39,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065732262] [2025-02-08 08:34:39,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065732262] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:39,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:39,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:34:39,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656086963] [2025-02-08 08:34:39,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:39,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:34:39,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:39,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:34:39,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:34:39,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:34:39,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 375 transitions, 8430 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:39,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:39,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:34:39,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand