./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 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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-?-8fc3dc6-m [2025-03-17 14:21:12,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:21:12,707 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:21:12,713 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:21:12,713 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:21:12,734 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:21:12,735 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:21:12,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:21:12,736 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:21:12,736 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:21:12,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:21:12,737 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:21:12,737 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:21:12,737 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:21:12,738 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:21:12,738 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:21:12,738 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:21:12,738 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:21:12,738 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:21:12,738 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:21:12,739 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:21:12,739 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:21:12,739 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:21:12,739 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:21:12,739 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:21:12,739 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:21:12,739 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:21:12,739 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:21:12,739 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:21:12,739 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:21:12,740 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:21:12,740 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:21:12,740 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:21:12,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:21:12,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:21:12,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:21:12,741 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:21:12,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:21:12,741 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:21:12,741 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:21:12,741 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:21:12,741 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:21:12,741 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/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 [2025-03-17 14:21:12,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:21:12,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:21:12,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:21:12,984 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:21:12,984 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:21:12,985 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2025-03-17 14:21:14,132 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05af9a1d8/17e8349b119149c7a1a4453a3752966a/FLAGe04a03fe8 [2025-03-17 14:21:14,384 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:21:14,385 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2025-03-17 14:21:14,390 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05af9a1d8/17e8349b119149c7a1a4453a3752966a/FLAGe04a03fe8 [2025-03-17 14:21:14,727 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05af9a1d8/17e8349b119149c7a1a4453a3752966a [2025-03-17 14:21:14,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:21:14,730 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:21:14,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:21:14,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:21:14,735 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:21:14,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3c5206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14, skipping insertion in model container [2025-03-17 14:21:14,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,752 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:21:14,869 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:21:14,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:21:14,880 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:21:14,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:21:14,912 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:21:14,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14 WrapperNode [2025-03-17 14:21:14,913 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:21:14,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:21:14,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:21:14,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:21:14,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,924 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,935 INFO L138 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 101 [2025-03-17 14:21:14,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:21:14,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:21:14,936 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:21:14,936 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:21:14,941 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,942 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,954 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]. [2025-03-17 14:21:14,954 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,959 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,960 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,961 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:21:14,963 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:21:14,963 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:21:14,963 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:21:14,964 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (1/1) ... [2025-03-17 14:21:14,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:21:14,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:14,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 14:21:14,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 14:21:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:21:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:21:15,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:21:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:21:15,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:21:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:21:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:21:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:21:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:21:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:21:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:21:15,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:21:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:21:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:21:15,008 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:21:15,073 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:21:15,074 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:21:15,297 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:21:15,297 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:21:15,435 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:21:15,435 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:21:15,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:21:15 BoogieIcfgContainer [2025-03-17 14:21:15,435 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:21:15,437 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:21:15,437 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:21:15,441 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:21:15,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:21:14" (1/3) ... [2025-03-17 14:21:15,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498cc8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:21:15, skipping insertion in model container [2025-03-17 14:21:15,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:14" (2/3) ... [2025-03-17 14:21:15,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498cc8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:21:15, skipping insertion in model container [2025-03-17 14:21:15,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:21:15" (3/3) ... [2025-03-17 14:21:15,442 INFO L128 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2025-03-17 14:21:15,452 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:21:15,454 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. [2025-03-17 14:21:15,454 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:21:15,498 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:21:15,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2025-03-17 14:21:15,547 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-03-17 14:21:15,549 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:21:15,551 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. [2025-03-17 14:21:15,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2025-03-17 14:21:15,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2025-03-17 14:21:15,561 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:21:15,570 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;@7edd544, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:21:15,570 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2025-03-17 14:21:15,573 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:21:15,573 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:21:15,573 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:21:15,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:15,576 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:21:15,577 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:15,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:15,581 INFO L85 PathProgramCache]: Analyzing trace with hash 376673, now seen corresponding path program 1 times [2025-03-17 14:21:15,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:15,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896076481] [2025-03-17 14:21:15,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:15,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:15,643 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:21:15,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:21:15,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:15,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:15,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:15,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896076481] [2025-03-17 14:21:15,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896076481] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:15,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:15,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:21:15,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523964989] [2025-03-17 14:21:15,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:15,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:21:15,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:15,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:21:15,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:21:15,851 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:15,853 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) [2025-03-17 14:21:15,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:15,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:15,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:15,938 INFO L124 PetriNetUnfolderBase]: 79/203 cut-off events. [2025-03-17 14:21:15,938 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-17 14:21:15,939 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. [2025-03-17 14:21:15,944 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 18 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2025-03-17 14:21:15,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 134 flow [2025-03-17 14:21:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:21:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:21:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-03-17 14:21:15,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2025-03-17 14:21:15,958 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 95 transitions. [2025-03-17 14:21:15,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 134 flow [2025-03-17 14:21:15,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:21:15,963 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2025-03-17 14:21:15,964 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} [2025-03-17 14:21:15,966 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2025-03-17 14:21:15,966 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2025-03-17 14:21:15,966 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) [2025-03-17 14:21:15,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:15,967 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:21:15,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:21:15,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:15,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:15,968 INFO L85 PathProgramCache]: Analyzing trace with hash 376674, now seen corresponding path program 1 times [2025-03-17 14:21:15,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:15,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901678993] [2025-03-17 14:21:15,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:15,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:15,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:21:15,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:21:15,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:15,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:16,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:16,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901678993] [2025-03-17 14:21:16,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901678993] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:16,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:16,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:21:16,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473250238] [2025-03-17 14:21:16,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:16,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:16,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:16,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:16,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:16,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:16,258 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) [2025-03-17 14:21:16,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:16,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:16,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:16,372 INFO L124 PetriNetUnfolderBase]: 80/206 cut-off events. [2025-03-17 14:21:16,372 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:21:16,372 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. [2025-03-17 14:21:16,375 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 21 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2025-03-17 14:21:16,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 146 flow [2025-03-17 14:21:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:21:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:21:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2025-03-17 14:21:16,376 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2025-03-17 14:21:16,376 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 122 transitions. [2025-03-17 14:21:16,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 146 flow [2025-03-17 14:21:16,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:21:16,378 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 113 flow [2025-03-17 14:21:16,378 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} [2025-03-17 14:21:16,379 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2025-03-17 14:21:16,379 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 113 flow [2025-03-17 14:21:16,379 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) [2025-03-17 14:21:16,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:16,379 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 14:21:16,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:21:16,379 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:16,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:16,380 INFO L85 PathProgramCache]: Analyzing trace with hash 11678734, now seen corresponding path program 1 times [2025-03-17 14:21:16,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:16,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295606310] [2025-03-17 14:21:16,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:16,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:16,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 14:21:16,396 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 14:21:16,396 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:16,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:16,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:16,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295606310] [2025-03-17 14:21:16,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295606310] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:16,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:16,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:16,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552361770] [2025-03-17 14:21:16,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:16,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:21:16,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:16,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:21:16,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:21:16,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:16,662 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) [2025-03-17 14:21:16,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:16,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:16,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:16,771 INFO L124 PetriNetUnfolderBase]: 81/209 cut-off events. [2025-03-17 14:21:16,772 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:21:16,774 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. [2025-03-17 14:21:16,776 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 21 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2025-03-17 14:21:16,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 175 flow [2025-03-17 14:21:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:21:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:21:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2025-03-17 14:21:16,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2025-03-17 14:21:16,779 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 113 flow. Second operand 5 states and 149 transitions. [2025-03-17 14:21:16,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 175 flow [2025-03-17 14:21:16,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:21:16,782 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 147 flow [2025-03-17 14:21:16,782 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} [2025-03-17 14:21:16,782 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2025-03-17 14:21:16,783 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 147 flow [2025-03-17 14:21:16,783 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) [2025-03-17 14:21:16,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:16,784 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:21:16,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:21:16,784 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:16,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash 361995208, now seen corresponding path program 1 times [2025-03-17 14:21:16,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:16,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246281625] [2025-03-17 14:21:16,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:16,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:16,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:21:16,796 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:21:16,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:16,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:16,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246281625] [2025-03-17 14:21:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246281625] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940442693] [2025-03-17 14:21:16,946 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:16,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:16,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:16,948 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:16,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:21:16,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:21:17,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:21:17,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:17,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:17,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:21:17,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:17,063 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 10 treesize of output 9 [2025-03-17 14:21:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:17,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:17,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940442693] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:17,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:17,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:21:17,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349908879] [2025-03-17 14:21:17,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:17,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:21:17,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:17,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:21:17,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:21:17,549 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:17,550 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) [2025-03-17 14:21:17,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:17,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:17,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:17,705 INFO L124 PetriNetUnfolderBase]: 82/211 cut-off events. [2025-03-17 14:21:17,706 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-17 14:21:17,706 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. [2025-03-17 14:21:17,709 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 10 changer transitions 0/49 dead transitions. [2025-03-17 14:21:17,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 218 flow [2025-03-17 14:21:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:21:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:21:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2025-03-17 14:21:17,712 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755208333333334 [2025-03-17 14:21:17,712 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 147 flow. Second operand 8 states and 221 transitions. [2025-03-17 14:21:17,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 218 flow [2025-03-17 14:21:17,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:21:17,714 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 177 flow [2025-03-17 14:21:17,714 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} [2025-03-17 14:21:17,715 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2025-03-17 14:21:17,715 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 177 flow [2025-03-17 14:21:17,715 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) [2025-03-17 14:21:17,715 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:17,715 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-17 14:21:17,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:17,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:17,920 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:17,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1661626320, now seen corresponding path program 1 times [2025-03-17 14:21:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:17,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510219224] [2025-03-17 14:21:17,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:17,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:17,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:21:17,936 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:21:17,936 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:17,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:18,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:18,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510219224] [2025-03-17 14:21:18,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510219224] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:18,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999562503] [2025-03-17 14:21:18,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:18,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:18,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:18,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:18,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:21:18,144 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:21:18,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:21:18,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:18,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:18,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:21:18,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:18,180 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 [2025-03-17 14:21:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:18,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:18,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999562503] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:18,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:18,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:21:18,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759027231] [2025-03-17 14:21:18,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:18,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:21:18,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:18,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:21:18,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:21:18,714 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:18,715 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) [2025-03-17 14:21:18,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:18,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:18,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:18,929 INFO L124 PetriNetUnfolderBase]: 82/210 cut-off events. [2025-03-17 14:21:18,929 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-17 14:21:18,930 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. [2025-03-17 14:21:18,931 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 14 selfloop transitions, 15 changer transitions 0/48 dead transitions. [2025-03-17 14:21:18,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 231 flow [2025-03-17 14:21:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:21:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:21:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2025-03-17 14:21:18,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2025-03-17 14:21:18,932 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 177 flow. Second operand 7 states and 195 transitions. [2025-03-17 14:21:18,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 231 flow [2025-03-17 14:21:18,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 184 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-17 14:21:18,934 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 156 flow [2025-03-17 14:21:18,934 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} [2025-03-17 14:21:18,935 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2025-03-17 14:21:18,935 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 156 flow [2025-03-17 14:21:18,935 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) [2025-03-17 14:21:18,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:18,935 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:18,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 14:21:19,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:19,136 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:19,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:19,137 INFO L85 PathProgramCache]: Analyzing trace with hash 32185982, now seen corresponding path program 1 times [2025-03-17 14:21:19,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:19,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929097988] [2025-03-17 14:21:19,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:19,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:19,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:21:19,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:21:19,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:19,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929097988] [2025-03-17 14:21:19,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929097988] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:19,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:19,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:19,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852836769] [2025-03-17 14:21:19,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:19,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:19,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:19,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:19,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:19,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-03-17 14:21:19,215 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) [2025-03-17 14:21:19,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:19,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-03-17 14:21:19,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:19,294 INFO L124 PetriNetUnfolderBase]: 117/323 cut-off events. [2025-03-17 14:21:19,294 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-17 14:21:19,294 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. [2025-03-17 14:21:19,296 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 42 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2025-03-17 14:21:19,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 314 flow [2025-03-17 14:21:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:21:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:21:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2025-03-17 14:21:19,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6958333333333333 [2025-03-17 14:21:19,297 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 156 flow. Second operand 5 states and 167 transitions. [2025-03-17 14:21:19,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 314 flow [2025-03-17 14:21:19,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 273 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-03-17 14:21:19,298 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 158 flow [2025-03-17 14:21:19,299 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} [2025-03-17 14:21:19,299 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2025-03-17 14:21:19,299 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 158 flow [2025-03-17 14:21:19,299 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) [2025-03-17 14:21:19,299 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:19,299 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:19,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:21:19,300 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:19,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1429710876, now seen corresponding path program 1 times [2025-03-17 14:21:19,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:19,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133207783] [2025-03-17 14:21:19,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:19,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:19,307 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:21:19,311 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:21:19,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:19,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:19,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:19,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133207783] [2025-03-17 14:21:19,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133207783] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:19,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:19,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:21:19,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982421067] [2025-03-17 14:21:19,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:19,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:21:19,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:19,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:21:19,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:21:19,406 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-03-17 14:21:19,406 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) [2025-03-17 14:21:19,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:19,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-03-17 14:21:19,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:19,509 INFO L124 PetriNetUnfolderBase]: 231/644 cut-off events. [2025-03-17 14:21:19,509 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-03-17 14:21:19,510 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. [2025-03-17 14:21:19,513 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 47 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2025-03-17 14:21:19,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 327 flow [2025-03-17 14:21:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:21:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:21:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2025-03-17 14:21:19,514 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.725 [2025-03-17 14:21:19,514 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 158 flow. Second operand 5 states and 174 transitions. [2025-03-17 14:21:19,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 327 flow [2025-03-17 14:21:19,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:21:19,516 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 186 flow [2025-03-17 14:21:19,516 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} [2025-03-17 14:21:19,516 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2025-03-17 14:21:19,516 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 186 flow [2025-03-17 14:21:19,517 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) [2025-03-17 14:21:19,517 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:19,517 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:19,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:21:19,517 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:19,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash 845511032, now seen corresponding path program 1 times [2025-03-17 14:21:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:19,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752523463] [2025-03-17 14:21:19,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:19,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:19,522 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:21:19,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:21:19,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:19,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:19,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:19,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752523463] [2025-03-17 14:21:19,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752523463] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:19,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:19,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:19,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564559248] [2025-03-17 14:21:19,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:19,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:19,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:19,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:19,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:19,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-03-17 14:21:19,592 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) [2025-03-17 14:21:19,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:19,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-03-17 14:21:19,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:19,676 INFO L124 PetriNetUnfolderBase]: 261/628 cut-off events. [2025-03-17 14:21:19,676 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2025-03-17 14:21:19,677 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. [2025-03-17 14:21:19,679 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 30 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2025-03-17 14:21:19,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 250 flow [2025-03-17 14:21:19,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:21:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:21:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-03-17 14:21:19,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-17 14:21:19,679 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 186 flow. Second operand 4 states and 104 transitions. [2025-03-17 14:21:19,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 250 flow [2025-03-17 14:21:19,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:21:19,681 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 188 flow [2025-03-17 14:21:19,681 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} [2025-03-17 14:21:19,681 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2025-03-17 14:21:19,681 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 188 flow [2025-03-17 14:21:19,682 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) [2025-03-17 14:21:19,682 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:19,682 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:19,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:21:19,682 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:19,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:19,682 INFO L85 PathProgramCache]: Analyzing trace with hash 845511033, now seen corresponding path program 1 times [2025-03-17 14:21:19,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:19,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105394576] [2025-03-17 14:21:19,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:19,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:19,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:21:19,689 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:21:19,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:19,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:19,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:19,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105394576] [2025-03-17 14:21:19,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105394576] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:19,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:19,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:19,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137942973] [2025-03-17 14:21:19,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:19,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:19,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:19,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:19,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-03-17 14:21:19,754 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) [2025-03-17 14:21:19,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:19,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-03-17 14:21:19,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:19,837 INFO L124 PetriNetUnfolderBase]: 176/415 cut-off events. [2025-03-17 14:21:19,837 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-03-17 14:21:19,838 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. [2025-03-17 14:21:19,839 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 41 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2025-03-17 14:21:19,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 320 flow [2025-03-17 14:21:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:21:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:21:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2025-03-17 14:21:19,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2025-03-17 14:21:19,841 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 188 flow. Second operand 5 states and 165 transitions. [2025-03-17 14:21:19,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 320 flow [2025-03-17 14:21:19,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:21:19,843 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 197 flow [2025-03-17 14:21:19,843 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} [2025-03-17 14:21:19,844 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2025-03-17 14:21:19,844 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 197 flow [2025-03-17 14:21:19,844 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) [2025-03-17 14:21:19,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:19,845 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:19,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:21:19,845 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:19,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:19,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1858152194, now seen corresponding path program 1 times [2025-03-17 14:21:19,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:19,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700130530] [2025-03-17 14:21:19,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:19,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:19,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:21:19,857 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:21:19,857 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:19,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:19,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:19,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700130530] [2025-03-17 14:21:19,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700130530] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:19,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:19,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:19,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449960042] [2025-03-17 14:21:19,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:19,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:21:19,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:19,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:21:19,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:21:19,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-03-17 14:21:19,953 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) [2025-03-17 14:21:19,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:19,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-03-17 14:21:19,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:20,013 INFO L124 PetriNetUnfolderBase]: 221/532 cut-off events. [2025-03-17 14:21:20,013 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2025-03-17 14:21:20,014 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. [2025-03-17 14:21:20,016 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 27 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2025-03-17 14:21:20,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 261 flow [2025-03-17 14:21:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:21:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:21:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2025-03-17 14:21:20,017 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-03-17 14:21:20,017 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 197 flow. Second operand 5 states and 124 transitions. [2025-03-17 14:21:20,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 261 flow [2025-03-17 14:21:20,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 253 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:21:20,019 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 199 flow [2025-03-17 14:21:20,020 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} [2025-03-17 14:21:20,020 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2025-03-17 14:21:20,020 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 199 flow [2025-03-17 14:21:20,020 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) [2025-03-17 14:21:20,020 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:20,020 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:20,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:21:20,020 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:20,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1858152195, now seen corresponding path program 1 times [2025-03-17 14:21:20,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:20,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84934902] [2025-03-17 14:21:20,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:20,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:20,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:21:20,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:21:20,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:20,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:21:20,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:20,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84934902] [2025-03-17 14:21:20,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84934902] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:20,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21993626] [2025-03-17 14:21:20,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:20,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:20,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:20,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:20,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:21:20,203 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:21:20,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:21:20,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:20,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:20,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:21:20,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:20,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:21:20,232 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 [2025-03-17 14:21:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:21:20,275 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 [2025-03-17 14:21:20,285 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:21:20,285 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 [2025-03-17 14:21:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:21:20,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:21:20,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21993626] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:20,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:21:20,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2025-03-17 14:21:20,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62823847] [2025-03-17 14:21:20,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:20,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:21:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:20,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:21:20,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:21:20,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:20,589 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) [2025-03-17 14:21:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:20,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:20,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:20,729 INFO L124 PetriNetUnfolderBase]: 232/559 cut-off events. [2025-03-17 14:21:20,729 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2025-03-17 14:21:20,730 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. [2025-03-17 14:21:20,732 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 42 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2025-03-17 14:21:20,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 346 flow [2025-03-17 14:21:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:21:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:21:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2025-03-17 14:21:20,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2025-03-17 14:21:20,733 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 199 flow. Second operand 5 states and 161 transitions. [2025-03-17 14:21:20,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 346 flow [2025-03-17 14:21:20,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:21:20,735 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 220 flow [2025-03-17 14:21:20,735 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} [2025-03-17 14:21:20,735 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2025-03-17 14:21:20,735 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 220 flow [2025-03-17 14:21:20,735 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) [2025-03-17 14:21:20,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:20,736 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:20,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:20,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:20,936 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:20,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash 416936287, now seen corresponding path program 1 times [2025-03-17 14:21:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026664605] [2025-03-17 14:21:20,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:20,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:21:20,949 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:21:20,949 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:20,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:20,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:20,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026664605] [2025-03-17 14:21:20,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026664605] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:20,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:20,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:21:20,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580578434] [2025-03-17 14:21:20,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:20,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:21:20,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:20,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:21:20,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:21:21,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-03-17 14:21:21,023 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) [2025-03-17 14:21:21,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:21,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-03-17 14:21:21,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:21,107 INFO L124 PetriNetUnfolderBase]: 246/610 cut-off events. [2025-03-17 14:21:21,108 INFO L125 PetriNetUnfolderBase]: For 251/262 co-relation queries the response was YES. [2025-03-17 14:21:21,109 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. [2025-03-17 14:21:21,110 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 45 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2025-03-17 14:21:21,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 390 flow [2025-03-17 14:21:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:21:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:21:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2025-03-17 14:21:21,111 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-03-17 14:21:21,111 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 220 flow. Second operand 5 states and 170 transitions. [2025-03-17 14:21:21,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 390 flow [2025-03-17 14:21:21,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 377 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:21:21,113 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 242 flow [2025-03-17 14:21:21,113 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} [2025-03-17 14:21:21,113 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2025-03-17 14:21:21,113 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 242 flow [2025-03-17 14:21:21,113 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) [2025-03-17 14:21:21,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:21,113 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:21,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 14:21:21,114 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:21,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1768143510, now seen corresponding path program 1 times [2025-03-17 14:21:21,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:21,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629617344] [2025-03-17 14:21:21,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:21,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:21,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:21:21,123 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:21:21,123 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:21,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:21,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:21,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629617344] [2025-03-17 14:21:21,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629617344] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:21,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797362476] [2025-03-17 14:21:21,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:21,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:21,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:21,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:21,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:21:21,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:21:21,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:21:21,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:21,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:21,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:21:21,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:21,360 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:21,398 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 [2025-03-17 14:21:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:21,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797362476] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:21,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:21,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-03-17 14:21:21,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604889059] [2025-03-17 14:21:21,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:21,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:21:21,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:21,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:21:21,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:21:21,679 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:21,679 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) [2025-03-17 14:21:21,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:21,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:21,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:21,865 INFO L124 PetriNetUnfolderBase]: 292/639 cut-off events. [2025-03-17 14:21:21,866 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2025-03-17 14:21:21,867 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. [2025-03-17 14:21:21,868 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 56 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2025-03-17 14:21:21,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 464 flow [2025-03-17 14:21:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:21:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:21:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2025-03-17 14:21:21,870 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2025-03-17 14:21:21,870 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 242 flow. Second operand 7 states and 229 transitions. [2025-03-17 14:21:21,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 464 flow [2025-03-17 14:21:21,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:21:21,872 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 269 flow [2025-03-17 14:21:21,872 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} [2025-03-17 14:21:21,872 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2025-03-17 14:21:21,872 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 269 flow [2025-03-17 14:21:21,872 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) [2025-03-17 14:21:21,873 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:21,873 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:21,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:22,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:22,073 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:22,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:22,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1042583299, now seen corresponding path program 1 times [2025-03-17 14:21:22,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:22,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607754417] [2025-03-17 14:21:22,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:22,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:22,079 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:21:22,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:21:22,089 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:22,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:22,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:22,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607754417] [2025-03-17 14:21:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607754417] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:22,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645114975] [2025-03-17 14:21:22,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:22,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:22,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:22,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:22,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:21:22,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:21:22,248 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:21:22,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:22,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:22,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:21:22,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:22,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:22,352 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 [2025-03-17 14:21:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:22,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645114975] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:22,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:22,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-03-17 14:21:22,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614877730] [2025-03-17 14:21:22,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:22,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:21:22,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:22,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:21:22,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:21:22,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:22,583 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) [2025-03-17 14:21:22,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:22,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:22,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:22,774 INFO L124 PetriNetUnfolderBase]: 307/707 cut-off events. [2025-03-17 14:21:22,774 INFO L125 PetriNetUnfolderBase]: For 719/770 co-relation queries the response was YES. [2025-03-17 14:21:22,775 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. [2025-03-17 14:21:22,777 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 52 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2025-03-17 14:21:22,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 497 flow [2025-03-17 14:21:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:21:22,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:21:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2025-03-17 14:21:22,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2025-03-17 14:21:22,778 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 269 flow. Second operand 7 states and 225 transitions. [2025-03-17 14:21:22,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 497 flow [2025-03-17 14:21:22,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 459 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-03-17 14:21:22,780 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 275 flow [2025-03-17 14:21:22,780 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} [2025-03-17 14:21:22,780 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2025-03-17 14:21:22,780 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 275 flow [2025-03-17 14:21:22,781 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) [2025-03-17 14:21:22,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:22,781 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:22,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 14:21:22,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 14:21:22,981 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:22,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:22,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2039656424, now seen corresponding path program 1 times [2025-03-17 14:21:22,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:22,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113672811] [2025-03-17 14:21:22,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:22,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:22,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:21:22,991 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:21:22,991 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:22,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:21:23,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:23,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113672811] [2025-03-17 14:21:23,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113672811] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:23,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350945566] [2025-03-17 14:21:23,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:23,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:23,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:23,102 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:23,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:21:23,138 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:21:23,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:21:23,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:23,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:23,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:21:23,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:23,161 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 [2025-03-17 14:21:23,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:21:23,203 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 [2025-03-17 14:21:23,211 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:21:23,211 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 [2025-03-17 14:21:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:21:23,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:23,346 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 [2025-03-17 14:21:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:21:23,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350945566] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:23,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:23,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:21:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011350651] [2025-03-17 14:21:23,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:23,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:21:23,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:23,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:21:23,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:21:23,723 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:21:23,724 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) [2025-03-17 14:21:23,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:23,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:21:23,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:23,982 INFO L124 PetriNetUnfolderBase]: 307/649 cut-off events. [2025-03-17 14:21:23,982 INFO L125 PetriNetUnfolderBase]: For 544/595 co-relation queries the response was YES. [2025-03-17 14:21:23,983 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. [2025-03-17 14:21:23,985 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 49 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2025-03-17 14:21:23,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 78 transitions, 500 flow [2025-03-17 14:21:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:21:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:21:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2025-03-17 14:21:23,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6067708333333334 [2025-03-17 14:21:23,986 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 275 flow. Second operand 8 states and 233 transitions. [2025-03-17 14:21:23,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 78 transitions, 500 flow [2025-03-17 14:21:23,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 469 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-17 14:21:23,989 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 296 flow [2025-03-17 14:21:23,989 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} [2025-03-17 14:21:23,989 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2025-03-17 14:21:23,989 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 296 flow [2025-03-17 14:21:23,990 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) [2025-03-17 14:21:23,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:23,990 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:23,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:21:24,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 14:21:24,191 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:24,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:24,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1284701768, now seen corresponding path program 1 times [2025-03-17 14:21:24,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:24,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568305986] [2025-03-17 14:21:24,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:24,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:24,196 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:21:24,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:21:24,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:24,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:24,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:24,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568305986] [2025-03-17 14:21:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568305986] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:24,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285407539] [2025-03-17 14:21:24,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:24,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:24,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:24,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:21:24,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:21:24,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:21:24,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:24,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:24,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:21:24,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:21:24,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:21:24,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285407539] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:24,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:24,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2025-03-17 14:21:24,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145168563] [2025-03-17 14:21:24,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:24,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 14:21:24,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:24,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 14:21:24,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:21:24,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-03-17 14:21:24,578 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) [2025-03-17 14:21:24,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:24,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-03-17 14:21:24,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:25,024 INFO L124 PetriNetUnfolderBase]: 771/1791 cut-off events. [2025-03-17 14:21:25,024 INFO L125 PetriNetUnfolderBase]: For 2039/2235 co-relation queries the response was YES. [2025-03-17 14:21:25,026 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. [2025-03-17 14:21:25,031 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 160 selfloop transitions, 29 changer transitions 0/207 dead transitions. [2025-03-17 14:21:25,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 207 transitions, 1252 flow [2025-03-17 14:21:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-17 14:21:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-17 14:21:25,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 834 transitions. [2025-03-17 14:21:25,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6682692307692307 [2025-03-17 14:21:25,033 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 296 flow. Second operand 26 states and 834 transitions. [2025-03-17 14:21:25,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 207 transitions, 1252 flow [2025-03-17 14:21:25,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 207 transitions, 1219 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-17 14:21:25,039 INFO L231 Difference]: Finished difference. Result has 106 places, 70 transitions, 499 flow [2025-03-17 14:21:25,039 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} [2025-03-17 14:21:25,040 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 60 predicate places. [2025-03-17 14:21:25,040 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 70 transitions, 499 flow [2025-03-17 14:21:25,040 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) [2025-03-17 14:21:25,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:25,041 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:25,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 14:21:25,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:25,241 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:25,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1792451006, now seen corresponding path program 1 times [2025-03-17 14:21:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:25,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604451004] [2025-03-17 14:21:25,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:25,247 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:21:25,252 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:21:25,252 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:25,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:21:25,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604451004] [2025-03-17 14:21:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604451004] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576230202] [2025-03-17 14:21:25,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:25,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:25,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:25,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:21:25,351 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:21:25,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:21:25,366 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:25,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:25,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:21:25,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:25,431 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:25,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576230202] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:25,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:25,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2025-03-17 14:21:25,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438685752] [2025-03-17 14:21:25,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:25,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 14:21:25,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:25,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 14:21:25,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:21:25,612 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-03-17 14:21:25,613 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) [2025-03-17 14:21:25,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:25,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-03-17 14:21:25,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:26,052 INFO L124 PetriNetUnfolderBase]: 603/1413 cut-off events. [2025-03-17 14:21:26,052 INFO L125 PetriNetUnfolderBase]: For 2212/2413 co-relation queries the response was YES. [2025-03-17 14:21:26,054 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. [2025-03-17 14:21:26,058 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 132 selfloop transitions, 32 changer transitions 0/182 dead transitions. [2025-03-17 14:21:26,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 182 transitions, 1188 flow [2025-03-17 14:21:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 14:21:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-17 14:21:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 865 transitions. [2025-03-17 14:21:26,061 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6436011904761905 [2025-03-17 14:21:26,061 INFO L175 Difference]: Start difference. First operand has 106 places, 70 transitions, 499 flow. Second operand 28 states and 865 transitions. [2025-03-17 14:21:26,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 182 transitions, 1188 flow [2025-03-17 14:21:26,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 182 transitions, 1171 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:21:26,065 INFO L231 Difference]: Finished difference. Result has 131 places, 76 transitions, 613 flow [2025-03-17 14:21:26,065 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} [2025-03-17 14:21:26,065 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 85 predicate places. [2025-03-17 14:21:26,066 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 76 transitions, 613 flow [2025-03-17 14:21:26,066 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) [2025-03-17 14:21:26,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:26,066 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:26,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:26,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:21:26,267 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:26,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:26,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1782064885, now seen corresponding path program 1 times [2025-03-17 14:21:26,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:26,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387415500] [2025-03-17 14:21:26,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:26,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:26,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:21:26,273 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:21:26,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:26,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:26,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387415500] [2025-03-17 14:21:26,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387415500] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:26,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:26,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:21:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316900272] [2025-03-17 14:21:26,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:26,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:21:26,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:26,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:21:26,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:21:26,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 48 [2025-03-17 14:21:26,316 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) [2025-03-17 14:21:26,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:26,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 48 [2025-03-17 14:21:26,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:26,442 INFO L124 PetriNetUnfolderBase]: 516/1314 cut-off events. [2025-03-17 14:21:26,442 INFO L125 PetriNetUnfolderBase]: For 2659/2869 co-relation queries the response was YES. [2025-03-17 14:21:26,445 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. [2025-03-17 14:21:26,448 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 52 selfloop transitions, 9 changer transitions 13/93 dead transitions. [2025-03-17 14:21:26,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 93 transitions, 880 flow [2025-03-17 14:21:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:21:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:21:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2025-03-17 14:21:26,449 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2025-03-17 14:21:26,449 INFO L175 Difference]: Start difference. First operand has 131 places, 76 transitions, 613 flow. Second operand 3 states and 110 transitions. [2025-03-17 14:21:26,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 93 transitions, 880 flow [2025-03-17 14:21:26,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 93 transitions, 819 flow, removed 9 selfloop flow, removed 14 redundant places. [2025-03-17 14:21:26,453 INFO L231 Difference]: Finished difference. Result has 120 places, 72 transitions, 560 flow [2025-03-17 14:21:26,453 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} [2025-03-17 14:21:26,453 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 74 predicate places. [2025-03-17 14:21:26,453 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 72 transitions, 560 flow [2025-03-17 14:21:26,453 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) [2025-03-17 14:21:26,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:26,453 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:26,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 14:21:26,454 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:26,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:26,454 INFO L85 PathProgramCache]: Analyzing trace with hash -889671476, now seen corresponding path program 2 times [2025-03-17 14:21:26,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:26,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507979789] [2025-03-17 14:21:26,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:26,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:26,460 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 14:21:26,466 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:21:26,466 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:26,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:21:26,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:26,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507979789] [2025-03-17 14:21:26,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507979789] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:26,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139903192] [2025-03-17 14:21:26,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:26,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:26,660 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:26,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:21:26,698 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-17 14:21:26,712 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:21:26,712 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:26,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:26,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 14:21:26,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:26,722 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 [2025-03-17 14:21:26,791 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:21:26,791 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 [2025-03-17 14:21:26,800 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 [2025-03-17 14:21:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:21:26,898 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:27,019 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 [2025-03-17 14:21:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:21:27,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139903192] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:27,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:27,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 18 [2025-03-17 14:21:27,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528993355] [2025-03-17 14:21:27,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:27,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 14:21:27,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:27,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 14:21:27,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2025-03-17 14:21:31,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:21:35,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:21:39,671 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] [2025-03-17 14:21:39,927 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:21:39,928 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) [2025-03-17 14:21:39,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:39,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:21:39,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:40,555 INFO L124 PetriNetUnfolderBase]: 873/1869 cut-off events. [2025-03-17 14:21:40,555 INFO L125 PetriNetUnfolderBase]: For 5048/5208 co-relation queries the response was YES. [2025-03-17 14:21:40,558 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. [2025-03-17 14:21:40,563 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 94 selfloop transitions, 25 changer transitions 0/134 dead transitions. [2025-03-17 14:21:40,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 134 transitions, 1069 flow [2025-03-17 14:21:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 14:21:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-17 14:21:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 411 transitions. [2025-03-17 14:21:40,565 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5036764705882353 [2025-03-17 14:21:40,565 INFO L175 Difference]: Start difference. First operand has 120 places, 72 transitions, 560 flow. Second operand 17 states and 411 transitions. [2025-03-17 14:21:40,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 134 transitions, 1069 flow [2025-03-17 14:21:40,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 134 transitions, 981 flow, removed 10 selfloop flow, removed 11 redundant places. [2025-03-17 14:21:40,570 INFO L231 Difference]: Finished difference. Result has 108 places, 75 transitions, 592 flow [2025-03-17 14:21:40,570 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} [2025-03-17 14:21:40,570 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2025-03-17 14:21:40,570 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 75 transitions, 592 flow [2025-03-17 14:21:40,571 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) [2025-03-17 14:21:40,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:40,571 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:40,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 14:21:40,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:40,771 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:40,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1810011667, now seen corresponding path program 1 times [2025-03-17 14:21:40,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:40,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997761521] [2025-03-17 14:21:40,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:40,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:40,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:21:40,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:21:40,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:40,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:21:40,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:40,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997761521] [2025-03-17 14:21:40,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997761521] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:40,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524763353] [2025-03-17 14:21:40,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:40,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:40,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:40,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:40,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:21:40,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:21:40,979 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:21:40,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:40,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:40,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:21:40,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:21:41,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:41,137 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 [2025-03-17 14:21:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:21:41,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524763353] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:41,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:41,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-03-17 14:21:41,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186422006] [2025-03-17 14:21:41,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:41,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:21:41,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:41,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:21:41,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:21:41,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:41,618 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) [2025-03-17 14:21:41,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:41,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:41,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:41,944 INFO L124 PetriNetUnfolderBase]: 781/1682 cut-off events. [2025-03-17 14:21:41,945 INFO L125 PetriNetUnfolderBase]: For 3459/3611 co-relation queries the response was YES. [2025-03-17 14:21:41,948 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. [2025-03-17 14:21:41,954 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 91 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2025-03-17 14:21:41,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1032 flow [2025-03-17 14:21:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:21:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:21:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 333 transitions. [2025-03-17 14:21:41,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.69375 [2025-03-17 14:21:41,956 INFO L175 Difference]: Start difference. First operand has 108 places, 75 transitions, 592 flow. Second operand 10 states and 333 transitions. [2025-03-17 14:21:41,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1032 flow [2025-03-17 14:21:41,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 979 flow, removed 7 selfloop flow, removed 11 redundant places. [2025-03-17 14:21:41,960 INFO L231 Difference]: Finished difference. Result has 109 places, 77 transitions, 620 flow [2025-03-17 14:21:41,960 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} [2025-03-17 14:21:41,960 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2025-03-17 14:21:41,960 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 77 transitions, 620 flow [2025-03-17 14:21:41,961 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) [2025-03-17 14:21:41,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:41,961 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:41,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 14:21:42,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:42,162 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:42,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash 283934662, now seen corresponding path program 2 times [2025-03-17 14:21:42,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:42,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180920378] [2025-03-17 14:21:42,163 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:42,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:42,169 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:21:42,177 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:21:42,177 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:42,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:21:42,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:42,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180920378] [2025-03-17 14:21:42,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180920378] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:42,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66746341] [2025-03-17 14:21:42,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:42,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:42,310 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:42,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:21:42,354 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:21:42,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:21:42,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:42,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:42,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:21:42,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:21:42,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:42,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2025-03-17 14:21:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:21:42,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66746341] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:42,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:42,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-17 14:21:42,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3915380] [2025-03-17 14:21:42,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:42,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:21:42,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:42,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:21:42,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:21:42,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:42,882 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) [2025-03-17 14:21:42,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:42,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:42,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:43,172 INFO L124 PetriNetUnfolderBase]: 1006/2310 cut-off events. [2025-03-17 14:21:43,172 INFO L125 PetriNetUnfolderBase]: For 6334/6567 co-relation queries the response was YES. [2025-03-17 14:21:43,176 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. [2025-03-17 14:21:43,181 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 87 selfloop transitions, 25 changer transitions 0/131 dead transitions. [2025-03-17 14:21:43,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 131 transitions, 1109 flow [2025-03-17 14:21:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:21:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:21:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 325 transitions. [2025-03-17 14:21:43,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2025-03-17 14:21:43,182 INFO L175 Difference]: Start difference. First operand has 109 places, 77 transitions, 620 flow. Second operand 10 states and 325 transitions. [2025-03-17 14:21:43,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 131 transitions, 1109 flow [2025-03-17 14:21:43,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 131 transitions, 1077 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-03-17 14:21:43,187 INFO L231 Difference]: Finished difference. Result has 117 places, 80 transitions, 678 flow [2025-03-17 14:21:43,187 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} [2025-03-17 14:21:43,187 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2025-03-17 14:21:43,187 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 80 transitions, 678 flow [2025-03-17 14:21:43,187 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) [2025-03-17 14:21:43,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:43,187 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:43,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 14:21:43,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-17 14:21:43,392 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:43,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash 212040255, now seen corresponding path program 1 times [2025-03-17 14:21:43,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:43,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069955635] [2025-03-17 14:21:43,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:43,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:43,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:21:43,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:21:43,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:43,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:21:43,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:43,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069955635] [2025-03-17 14:21:43,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069955635] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:43,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528050588] [2025-03-17 14:21:43,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:43,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:43,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:43,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:43,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:21:43,604 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:21:43,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:21:43,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:43,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:43,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 14:21:43,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:43,634 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 [2025-03-17 14:21:43,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:21:43,697 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 [2025-03-17 14:21:43,705 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:21:43,705 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 [2025-03-17 14:21:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:21:43,782 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:43,896 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 [2025-03-17 14:21:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:21:43,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528050588] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:43,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:43,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-03-17 14:21:43,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356848777] [2025-03-17 14:21:43,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:43,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:21:43,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:43,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:21:43,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:21:44,483 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:21:44,484 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) [2025-03-17 14:21:44,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:44,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:21:44,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:44,854 INFO L124 PetriNetUnfolderBase]: 1020/2186 cut-off events. [2025-03-17 14:21:44,854 INFO L125 PetriNetUnfolderBase]: For 7113/7320 co-relation queries the response was YES. [2025-03-17 14:21:44,859 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. [2025-03-17 14:21:44,863 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 72 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2025-03-17 14:21:44,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 118 transitions, 1091 flow [2025-03-17 14:21:44,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:21:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:21:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 316 transitions. [2025-03-17 14:21:44,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2025-03-17 14:21:44,865 INFO L175 Difference]: Start difference. First operand has 117 places, 80 transitions, 678 flow. Second operand 11 states and 316 transitions. [2025-03-17 14:21:44,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 118 transitions, 1091 flow [2025-03-17 14:21:44,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 1056 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-17 14:21:44,871 INFO L231 Difference]: Finished difference. Result has 125 places, 82 transitions, 724 flow [2025-03-17 14:21:44,872 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} [2025-03-17 14:21:44,872 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 79 predicate places. [2025-03-17 14:21:44,872 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 82 transitions, 724 flow [2025-03-17 14:21:44,873 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) [2025-03-17 14:21:44,873 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:44,873 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:44,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:45,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-17 14:21:45,077 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:45,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:45,077 INFO L85 PathProgramCache]: Analyzing trace with hash 316733384, now seen corresponding path program 2 times [2025-03-17 14:21:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:45,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119023267] [2025-03-17 14:21:45,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:45,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:45,082 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:21:45,091 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:21:45,091 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:45,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:21:45,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:45,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119023267] [2025-03-17 14:21:45,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119023267] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:45,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137240947] [2025-03-17 14:21:45,163 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:45,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:45,164 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:45,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:21:45,204 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:21:45,222 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:21:45,222 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:45,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:45,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:21:45,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:21:45,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:21:45,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137240947] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:45,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:45,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2025-03-17 14:21:45,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487449905] [2025-03-17 14:21:45,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:45,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 14:21:45,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:45,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 14:21:45,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:21:45,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-03-17 14:21:45,603 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) [2025-03-17 14:21:45,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:45,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-03-17 14:21:45,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:46,415 INFO L124 PetriNetUnfolderBase]: 2562/5698 cut-off events. [2025-03-17 14:21:46,416 INFO L125 PetriNetUnfolderBase]: For 20307/20937 co-relation queries the response was YES. [2025-03-17 14:21:46,426 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. [2025-03-17 14:21:46,437 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 255 selfloop transitions, 59 changer transitions 0/337 dead transitions. [2025-03-17 14:21:46,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 337 transitions, 2757 flow [2025-03-17 14:21:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-17 14:21:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-03-17 14:21:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1433 transitions. [2025-03-17 14:21:46,439 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6490036231884058 [2025-03-17 14:21:46,439 INFO L175 Difference]: Start difference. First operand has 125 places, 82 transitions, 724 flow. Second operand 46 states and 1433 transitions. [2025-03-17 14:21:46,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 337 transitions, 2757 flow [2025-03-17 14:21:46,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 337 transitions, 2725 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:21:46,453 INFO L231 Difference]: Finished difference. Result has 169 places, 115 transitions, 1221 flow [2025-03-17 14:21:46,453 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} [2025-03-17 14:21:46,453 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 123 predicate places. [2025-03-17 14:21:46,453 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 115 transitions, 1221 flow [2025-03-17 14:21:46,454 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) [2025-03-17 14:21:46,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:46,454 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:46,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 14:21:46,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-17 14:21:46,654 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:46,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1005330293, now seen corresponding path program 3 times [2025-03-17 14:21:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:46,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470950665] [2025-03-17 14:21:46,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:21:46,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:46,661 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-03-17 14:21:46,667 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 25 statements. [2025-03-17 14:21:46,667 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:21:46,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-17 14:21:46,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:46,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470950665] [2025-03-17 14:21:46,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470950665] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:46,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955058855] [2025-03-17 14:21:46,782 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:21:46,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:46,785 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:46,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:21:46,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-03-17 14:21:46,850 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 25 statements. [2025-03-17 14:21:46,850 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:21:46,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:46,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:21:46,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-17 14:21:46,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:47,004 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 [2025-03-17 14:21:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-17 14:21:47,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955058855] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:47,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:47,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-17 14:21:47,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329802412] [2025-03-17 14:21:47,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:47,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 14:21:47,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:47,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 14:21:47,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:21:47,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:21:47,273 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) [2025-03-17 14:21:47,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:47,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:21:47,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:47,950 INFO L124 PetriNetUnfolderBase]: 3840/8308 cut-off events. [2025-03-17 14:21:47,950 INFO L125 PetriNetUnfolderBase]: For 27732/27732 co-relation queries the response was YES. [2025-03-17 14:21:47,969 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. [2025-03-17 14:21:47,993 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 127 selfloop transitions, 33 changer transitions 0/176 dead transitions. [2025-03-17 14:21:47,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 176 transitions, 2144 flow [2025-03-17 14:21:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:21:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:21:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2025-03-17 14:21:47,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6015625 [2025-03-17 14:21:47,994 INFO L175 Difference]: Start difference. First operand has 169 places, 115 transitions, 1221 flow. Second operand 8 states and 231 transitions. [2025-03-17 14:21:47,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 176 transitions, 2144 flow [2025-03-17 14:21:48,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 176 transitions, 2065 flow, removed 4 selfloop flow, removed 16 redundant places. [2025-03-17 14:21:48,027 INFO L231 Difference]: Finished difference. Result has 160 places, 115 transitions, 1228 flow [2025-03-17 14:21:48,027 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} [2025-03-17 14:21:48,027 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 114 predicate places. [2025-03-17 14:21:48,027 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 115 transitions, 1228 flow [2025-03-17 14:21:48,028 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) [2025-03-17 14:21:48,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:48,028 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] [2025-03-17 14:21:48,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:48,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:48,232 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:48,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash -122132036, now seen corresponding path program 1 times [2025-03-17 14:21:48,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:48,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636657564] [2025-03-17 14:21:48,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:48,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:48,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 14:21:48,240 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:21:48,240 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:48,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:48,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636657564] [2025-03-17 14:21:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636657564] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642942850] [2025-03-17 14:21:48,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:48,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:48,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:48,323 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:48,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:21:48,364 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 14:21:48,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:21:48,379 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:48,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:48,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:21:48,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:21:48,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:21:48,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642942850] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:48,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:21:48,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 15 [2025-03-17 14:21:48,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240522816] [2025-03-17 14:21:48,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:48,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:21:48,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:48,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:21:48,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:21:48,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:48,544 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) [2025-03-17 14:21:48,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:48,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:48,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:49,029 INFO L124 PetriNetUnfolderBase]: 2855/6245 cut-off events. [2025-03-17 14:21:49,029 INFO L125 PetriNetUnfolderBase]: For 29321/29983 co-relation queries the response was YES. [2025-03-17 14:21:49,040 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. [2025-03-17 14:21:49,053 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 102 selfloop transitions, 19 changer transitions 0/144 dead transitions. [2025-03-17 14:21:49,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 144 transitions, 1734 flow [2025-03-17 14:21:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:21:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:21:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2025-03-17 14:21:49,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2025-03-17 14:21:49,054 INFO L175 Difference]: Start difference. First operand has 160 places, 115 transitions, 1228 flow. Second operand 7 states and 212 transitions. [2025-03-17 14:21:49,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 144 transitions, 1734 flow [2025-03-17 14:21:49,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 144 transitions, 1679 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-03-17 14:21:49,071 INFO L231 Difference]: Finished difference. Result has 162 places, 115 transitions, 1224 flow [2025-03-17 14:21:49,071 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} [2025-03-17 14:21:49,072 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 116 predicate places. [2025-03-17 14:21:49,072 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 115 transitions, 1224 flow [2025-03-17 14:21:49,072 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) [2025-03-17 14:21:49,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:49,072 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] [2025-03-17 14:21:49,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:49,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:49,273 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:49,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:49,273 INFO L85 PathProgramCache]: Analyzing trace with hash 767509424, now seen corresponding path program 1 times [2025-03-17 14:21:49,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:49,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893698473] [2025-03-17 14:21:49,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:49,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:49,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 14:21:49,282 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:21:49,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:49,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:49,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:49,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893698473] [2025-03-17 14:21:49,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893698473] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:49,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100622721] [2025-03-17 14:21:49,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:49,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:49,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:49,386 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:49,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 14:21:49,429 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 14:21:49,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:21:49,444 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:49,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:49,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:21:49,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:21:49,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:21:49,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100622721] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:49,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:21:49,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 16 [2025-03-17 14:21:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480292711] [2025-03-17 14:21:49,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:49,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:21:49,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:49,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:21:49,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:21:49,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-03-17 14:21:49,593 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) [2025-03-17 14:21:49,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:49,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-03-17 14:21:49,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:50,001 INFO L124 PetriNetUnfolderBase]: 2558/5419 cut-off events. [2025-03-17 14:21:50,002 INFO L125 PetriNetUnfolderBase]: For 28265/29044 co-relation queries the response was YES. [2025-03-17 14:21:50,016 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. [2025-03-17 14:21:50,026 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 85 selfloop transitions, 33 changer transitions 0/140 dead transitions. [2025-03-17 14:21:50,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 140 transitions, 1603 flow [2025-03-17 14:21:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:21:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:21:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2025-03-17 14:21:50,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-03-17 14:21:50,027 INFO L175 Difference]: Start difference. First operand has 162 places, 115 transitions, 1224 flow. Second operand 7 states and 216 transitions. [2025-03-17 14:21:50,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 140 transitions, 1603 flow [2025-03-17 14:21:50,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 140 transitions, 1555 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:21:50,079 INFO L231 Difference]: Finished difference. Result has 164 places, 116 transitions, 1311 flow [2025-03-17 14:21:50,079 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} [2025-03-17 14:21:50,079 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 118 predicate places. [2025-03-17 14:21:50,079 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 116 transitions, 1311 flow [2025-03-17 14:21:50,079 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) [2025-03-17 14:21:50,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:50,079 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:50,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-17 14:21:50,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-17 14:21:50,280 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:50,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:50,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1100467686, now seen corresponding path program 2 times [2025-03-17 14:21:50,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:50,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855796152] [2025-03-17 14:21:50,280 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:50,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:50,285 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 14:21:50,295 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:21:50,295 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:50,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:21:50,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:50,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855796152] [2025-03-17 14:21:50,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855796152] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:50,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274432791] [2025-03-17 14:21:50,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:50,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:50,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:50,381 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:50,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 14:21:50,433 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 14:21:50,454 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:21:50,454 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:50,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:50,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:21:50,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:21:50,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:21:50,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274432791] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:50,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:50,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-17 14:21:50,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449234450] [2025-03-17 14:21:50,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:50,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:21:50,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:50,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:21:50,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:21:50,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-03-17 14:21:50,904 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) [2025-03-17 14:21:50,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:50,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-03-17 14:21:50,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:51,514 INFO L124 PetriNetUnfolderBase]: 2045/4766 cut-off events. [2025-03-17 14:21:51,514 INFO L125 PetriNetUnfolderBase]: For 30853/31728 co-relation queries the response was YES. [2025-03-17 14:21:51,528 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. [2025-03-17 14:21:51,539 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 103 selfloop transitions, 46 changer transitions 0/174 dead transitions. [2025-03-17 14:21:51,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 174 transitions, 1956 flow [2025-03-17 14:21:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:21:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:21:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 467 transitions. [2025-03-17 14:21:51,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486111111111111 [2025-03-17 14:21:51,542 INFO L175 Difference]: Start difference. First operand has 164 places, 116 transitions, 1311 flow. Second operand 15 states and 467 transitions. [2025-03-17 14:21:51,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 174 transitions, 1956 flow [2025-03-17 14:21:51,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 174 transitions, 1904 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-03-17 14:21:51,560 INFO L231 Difference]: Finished difference. Result has 176 places, 121 transitions, 1477 flow [2025-03-17 14:21:51,560 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} [2025-03-17 14:21:51,560 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 130 predicate places. [2025-03-17 14:21:51,560 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 121 transitions, 1477 flow [2025-03-17 14:21:51,560 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) [2025-03-17 14:21:51,560 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:51,560 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:51,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:51,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-17 14:21:51,761 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:51,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:51,761 INFO L85 PathProgramCache]: Analyzing trace with hash 693873604, now seen corresponding path program 3 times [2025-03-17 14:21:51,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:51,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520830732] [2025-03-17 14:21:51,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:21:51,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:51,768 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-17 14:21:51,776 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 28 statements. [2025-03-17 14:21:51,776 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:21:51,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-17 14:21:51,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520830732] [2025-03-17 14:21:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520830732] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314506553] [2025-03-17 14:21:51,927 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:21:51,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:51,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:51,929 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:51,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 14:21:51,971 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-17 14:21:51,984 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 28 statements. [2025-03-17 14:21:51,984 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:21:51,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:51,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:21:51,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-17 14:21:52,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:52,329 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 [2025-03-17 14:21:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-17 14:21:52,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314506553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:52,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:52,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-03-17 14:21:52,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197675808] [2025-03-17 14:21:52,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:52,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 14:21:52,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:52,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 14:21:52,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2025-03-17 14:21:53,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:21:53,000 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) [2025-03-17 14:21:53,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:53,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:21:53,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:53,554 INFO L124 PetriNetUnfolderBase]: 2727/5670 cut-off events. [2025-03-17 14:21:53,554 INFO L125 PetriNetUnfolderBase]: For 26821/27456 co-relation queries the response was YES. [2025-03-17 14:21:53,569 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. [2025-03-17 14:21:53,579 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 110 selfloop transitions, 49 changer transitions 0/175 dead transitions. [2025-03-17 14:21:53,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 175 transitions, 2377 flow [2025-03-17 14:21:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:21:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:21:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 281 transitions. [2025-03-17 14:21:53,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5854166666666667 [2025-03-17 14:21:53,580 INFO L175 Difference]: Start difference. First operand has 176 places, 121 transitions, 1477 flow. Second operand 10 states and 281 transitions. [2025-03-17 14:21:53,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 175 transitions, 2377 flow [2025-03-17 14:21:53,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 175 transitions, 2279 flow, removed 2 selfloop flow, removed 11 redundant places. [2025-03-17 14:21:53,602 INFO L231 Difference]: Finished difference. Result has 173 places, 120 transitions, 1471 flow [2025-03-17 14:21:53,602 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} [2025-03-17 14:21:53,602 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 127 predicate places. [2025-03-17 14:21:53,602 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 120 transitions, 1471 flow [2025-03-17 14:21:53,602 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) [2025-03-17 14:21:53,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:53,603 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:53,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-17 14:21:53,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-17 14:21:53,804 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:53,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:53,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2040644340, now seen corresponding path program 3 times [2025-03-17 14:21:53,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:53,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788786271] [2025-03-17 14:21:53,804 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:21:53,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:53,812 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-17 14:21:53,816 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 28 statements. [2025-03-17 14:21:53,816 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:21:53,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:21:53,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:53,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788786271] [2025-03-17 14:21:53,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788786271] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:21:53,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19380805] [2025-03-17 14:21:53,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:21:53,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:53,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:53,968 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:53,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 14:21:54,013 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-17 14:21:54,029 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 28 statements. [2025-03-17 14:21:54,029 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:21:54,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:54,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 14:21:54,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:54,035 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 [2025-03-17 14:21:54,091 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:21:54,091 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 [2025-03-17 14:21:54,101 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:21:54,102 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 [2025-03-17 14:21:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:21:54,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:54,484 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 [2025-03-17 14:21:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:21:54,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19380805] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:54,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:21:54,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2025-03-17 14:21:54,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228833168] [2025-03-17 14:21:54,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:54,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 14:21:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:54,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 14:21:54,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:21:55,357 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-03-17 14:21:55,358 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) [2025-03-17 14:21:55,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:55,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-03-17 14:21:55,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:56,045 INFO L124 PetriNetUnfolderBase]: 2829/5910 cut-off events. [2025-03-17 14:21:56,045 INFO L125 PetriNetUnfolderBase]: For 32819/33866 co-relation queries the response was YES. [2025-03-17 14:21:56,060 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. [2025-03-17 14:21:56,072 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 124 selfloop transitions, 58 changer transitions 0/197 dead transitions. [2025-03-17 14:21:56,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 197 transitions, 2913 flow [2025-03-17 14:21:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:21:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:21:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2025-03-17 14:21:56,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2025-03-17 14:21:56,073 INFO L175 Difference]: Start difference. First operand has 173 places, 120 transitions, 1471 flow. Second operand 11 states and 280 transitions. [2025-03-17 14:21:56,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 197 transitions, 2913 flow [2025-03-17 14:21:56,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 197 transitions, 2583 flow, removed 2 selfloop flow, removed 10 redundant places. [2025-03-17 14:21:56,105 INFO L231 Difference]: Finished difference. Result has 172 places, 119 transitions, 1429 flow [2025-03-17 14:21:56,105 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} [2025-03-17 14:21:56,106 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 126 predicate places. [2025-03-17 14:21:56,106 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 119 transitions, 1429 flow [2025-03-17 14:21:56,106 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) [2025-03-17 14:21:56,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:56,106 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] [2025-03-17 14:21:56,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:56,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-17 14:21:56,306 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:56,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash -966540906, now seen corresponding path program 1 times [2025-03-17 14:21:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:56,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331901183] [2025-03-17 14:21:56,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:56,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:56,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 14:21:56,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:21:56,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:56,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:21:56,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:56,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331901183] [2025-03-17 14:21:56,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331901183] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:56,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:56,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:21:56,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108159441] [2025-03-17 14:21:56,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:56,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:21:56,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:56,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:21:56,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:21:56,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:21:56,661 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) [2025-03-17 14:21:56,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:56,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:21:56,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:57,338 INFO L124 PetriNetUnfolderBase]: 3579/7438 cut-off events. [2025-03-17 14:21:57,338 INFO L125 PetriNetUnfolderBase]: For 29599/29599 co-relation queries the response was YES. [2025-03-17 14:21:57,360 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. [2025-03-17 14:21:57,377 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 115 selfloop transitions, 47 changer transitions 16/189 dead transitions. [2025-03-17 14:21:57,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 189 transitions, 2422 flow [2025-03-17 14:21:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:21:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:21:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 270 transitions. [2025-03-17 14:21:57,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-17 14:21:57,378 INFO L175 Difference]: Start difference. First operand has 172 places, 119 transitions, 1429 flow. Second operand 9 states and 270 transitions. [2025-03-17 14:21:57,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 189 transitions, 2422 flow [2025-03-17 14:21:57,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 189 transitions, 2173 flow, removed 1 selfloop flow, removed 11 redundant places. [2025-03-17 14:21:57,414 INFO L231 Difference]: Finished difference. Result has 175 places, 141 transitions, 1802 flow [2025-03-17 14:21:57,414 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} [2025-03-17 14:21:57,414 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 129 predicate places. [2025-03-17 14:21:57,414 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 141 transitions, 1802 flow [2025-03-17 14:21:57,414 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) [2025-03-17 14:21:57,414 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:57,415 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] [2025-03-17 14:21:57,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-17 14:21:57,415 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:57,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:57,415 INFO L85 PathProgramCache]: Analyzing trace with hash 895579180, now seen corresponding path program 2 times [2025-03-17 14:21:57,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:57,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583530536] [2025-03-17 14:21:57,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:57,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:57,421 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:21:57,429 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:21:57,429 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:57,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:21:57,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:57,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583530536] [2025-03-17 14:21:57,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583530536] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:57,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:57,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:21:57,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284046097] [2025-03-17 14:21:57,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:57,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:21:57,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:57,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:21:57,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:21:57,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:21:57,858 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) [2025-03-17 14:21:57,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:57,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:21:57,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:58,536 INFO L124 PetriNetUnfolderBase]: 3597/7373 cut-off events. [2025-03-17 14:21:58,536 INFO L125 PetriNetUnfolderBase]: For 28359/28359 co-relation queries the response was YES. [2025-03-17 14:21:58,550 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. [2025-03-17 14:21:58,561 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 105 selfloop transitions, 92 changer transitions 9/217 dead transitions. [2025-03-17 14:21:58,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 217 transitions, 3243 flow [2025-03-17 14:21:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:21:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:21:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2025-03-17 14:21:58,562 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6134259259259259 [2025-03-17 14:21:58,562 INFO L175 Difference]: Start difference. First operand has 175 places, 141 transitions, 1802 flow. Second operand 9 states and 265 transitions. [2025-03-17 14:21:58,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 217 transitions, 3243 flow [2025-03-17 14:21:58,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 217 transitions, 3069 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-03-17 14:21:58,614 INFO L231 Difference]: Finished difference. Result has 181 places, 190 transitions, 2848 flow [2025-03-17 14:21:58,614 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} [2025-03-17 14:21:58,614 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 135 predicate places. [2025-03-17 14:21:58,614 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 190 transitions, 2848 flow [2025-03-17 14:21:58,614 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) [2025-03-17 14:21:58,614 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:58,614 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] [2025-03-17 14:21:58,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-03-17 14:21:58,614 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:58,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:58,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1499934694, now seen corresponding path program 1 times [2025-03-17 14:21:58,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:58,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837612205] [2025-03-17 14:21:58,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:58,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:58,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 14:21:58,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:21:58,624 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:58,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:21:58,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:58,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837612205] [2025-03-17 14:21:58,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837612205] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:58,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:58,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:21:58,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482736402] [2025-03-17 14:21:58,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:58,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:21:58,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:58,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:21:58,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:21:58,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:21:58,947 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) [2025-03-17 14:21:58,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:58,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:21:58,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:59,603 INFO L124 PetriNetUnfolderBase]: 3858/7838 cut-off events. [2025-03-17 14:21:59,603 INFO L125 PetriNetUnfolderBase]: For 31458/31458 co-relation queries the response was YES. [2025-03-17 14:21:59,626 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. [2025-03-17 14:21:59,641 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 115 selfloop transitions, 131 changer transitions 7/264 dead transitions. [2025-03-17 14:21:59,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 264 transitions, 4457 flow [2025-03-17 14:21:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:21:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:21:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2025-03-17 14:21:59,642 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6134259259259259 [2025-03-17 14:21:59,642 INFO L175 Difference]: Start difference. First operand has 181 places, 190 transitions, 2848 flow. Second operand 9 states and 265 transitions. [2025-03-17 14:21:59,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 264 transitions, 4457 flow [2025-03-17 14:21:59,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 264 transitions, 4435 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-17 14:21:59,713 INFO L231 Difference]: Finished difference. Result has 191 places, 236 transitions, 4167 flow [2025-03-17 14:21:59,713 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} [2025-03-17 14:21:59,713 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 145 predicate places. [2025-03-17 14:21:59,714 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 236 transitions, 4167 flow [2025-03-17 14:21:59,714 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) [2025-03-17 14:21:59,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:59,714 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] [2025-03-17 14:21:59,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-03-17 14:21:59,714 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:21:59,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:59,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1373881256, now seen corresponding path program 2 times [2025-03-17 14:21:59,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:21:59,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182090157] [2025-03-17 14:21:59,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:21:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:21:59,718 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:21:59,724 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:21:59,724 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:21:59,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:21:59,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:21:59,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182090157] [2025-03-17 14:21:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182090157] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:59,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:59,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:21:59,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493346421] [2025-03-17 14:21:59,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:59,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:21:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:21:59,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:21:59,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:00,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:00,053 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) [2025-03-17 14:22:00,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:00,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:00,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:00,757 INFO L124 PetriNetUnfolderBase]: 3822/7739 cut-off events. [2025-03-17 14:22:00,757 INFO L125 PetriNetUnfolderBase]: For 37246/37246 co-relation queries the response was YES. [2025-03-17 14:22:00,789 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. [2025-03-17 14:22:00,806 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 111 selfloop transitions, 142 changer transitions 15/279 dead transitions. [2025-03-17 14:22:00,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 279 transitions, 5163 flow [2025-03-17 14:22:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2025-03-17 14:22:00,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6134259259259259 [2025-03-17 14:22:00,807 INFO L175 Difference]: Start difference. First operand has 191 places, 236 transitions, 4167 flow. Second operand 9 states and 265 transitions. [2025-03-17 14:22:00,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 279 transitions, 5163 flow [2025-03-17 14:22:00,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 279 transitions, 4992 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-03-17 14:22:00,938 INFO L231 Difference]: Finished difference. Result has 198 places, 245 transitions, 4544 flow [2025-03-17 14:22:00,938 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} [2025-03-17 14:22:00,938 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 152 predicate places. [2025-03-17 14:22:00,938 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 245 transitions, 4544 flow [2025-03-17 14:22:00,939 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) [2025-03-17 14:22:00,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:00,939 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] [2025-03-17 14:22:00,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-03-17 14:22:00,939 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:00,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:00,939 INFO L85 PathProgramCache]: Analyzing trace with hash -817835958, now seen corresponding path program 3 times [2025-03-17 14:22:00,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:00,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027023992] [2025-03-17 14:22:00,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:22:00,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:00,946 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:00,953 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 28 statements. [2025-03-17 14:22:00,955 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:22:00,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:01,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027023992] [2025-03-17 14:22:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027023992] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:01,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:01,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:01,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292843313] [2025-03-17 14:22:01,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:01,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:01,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:01,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:01,308 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:01,308 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) [2025-03-17 14:22:01,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:01,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:01,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:02,125 INFO L124 PetriNetUnfolderBase]: 3994/8247 cut-off events. [2025-03-17 14:22:02,125 INFO L125 PetriNetUnfolderBase]: For 42810/42810 co-relation queries the response was YES. [2025-03-17 14:22:02,154 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. [2025-03-17 14:22:02,171 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 148 selfloop transitions, 156 changer transitions 4/319 dead transitions. [2025-03-17 14:22:02,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 319 transitions, 5791 flow [2025-03-17 14:22:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:22:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:22:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 308 transitions. [2025-03-17 14:22:02,171 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2025-03-17 14:22:02,172 INFO L175 Difference]: Start difference. First operand has 198 places, 245 transitions, 4544 flow. Second operand 10 states and 308 transitions. [2025-03-17 14:22:02,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 319 transitions, 5791 flow [2025-03-17 14:22:02,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 319 transitions, 5479 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-17 14:22:02,344 INFO L231 Difference]: Finished difference. Result has 200 places, 253 transitions, 4716 flow [2025-03-17 14:22:02,344 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} [2025-03-17 14:22:02,344 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 154 predicate places. [2025-03-17 14:22:02,344 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 253 transitions, 4716 flow [2025-03-17 14:22:02,344 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) [2025-03-17 14:22:02,344 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:02,344 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] [2025-03-17 14:22:02,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-03-17 14:22:02,344 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:02,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2128403004, now seen corresponding path program 3 times [2025-03-17 14:22:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:02,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434202644] [2025-03-17 14:22:02,345 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:22:02,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:02,348 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:02,352 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 28 statements. [2025-03-17 14:22:02,352 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:22:02,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:02,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:02,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434202644] [2025-03-17 14:22:02,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434202644] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:02,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:02,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:02,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530993365] [2025-03-17 14:22:02,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:02,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:02,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:02,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:02,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:02,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:02,601 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) [2025-03-17 14:22:02,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:02,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:02,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:03,387 INFO L124 PetriNetUnfolderBase]: 4174/8454 cut-off events. [2025-03-17 14:22:03,388 INFO L125 PetriNetUnfolderBase]: For 51265/51265 co-relation queries the response was YES. [2025-03-17 14:22:03,416 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. [2025-03-17 14:22:03,434 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 118 selfloop transitions, 152 changer transitions 12/293 dead transitions. [2025-03-17 14:22:03,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 293 transitions, 5666 flow [2025-03-17 14:22:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2025-03-17 14:22:03,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2025-03-17 14:22:03,435 INFO L175 Difference]: Start difference. First operand has 200 places, 253 transitions, 4716 flow. Second operand 9 states and 266 transitions. [2025-03-17 14:22:03,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 293 transitions, 5666 flow [2025-03-17 14:22:03,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 293 transitions, 5346 flow, removed 14 selfloop flow, removed 7 redundant places. [2025-03-17 14:22:03,651 INFO L231 Difference]: Finished difference. Result has 204 places, 263 transitions, 5004 flow [2025-03-17 14:22:03,651 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} [2025-03-17 14:22:03,651 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 158 predicate places. [2025-03-17 14:22:03,651 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 263 transitions, 5004 flow [2025-03-17 14:22:03,651 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) [2025-03-17 14:22:03,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:03,651 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] [2025-03-17 14:22:03,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2025-03-17 14:22:03,652 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:03,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2102379328, now seen corresponding path program 4 times [2025-03-17 14:22:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:03,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000994399] [2025-03-17 14:22:03,652 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:22:03,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:03,656 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:22:03,660 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:03,660 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:22:03,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:03,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:03,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000994399] [2025-03-17 14:22:03,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000994399] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:03,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:03,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:22:03,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654916518] [2025-03-17 14:22:03,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:03,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:03,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:03,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:03,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:22:03,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:03,817 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) [2025-03-17 14:22:03,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:03,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:03,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:04,585 INFO L124 PetriNetUnfolderBase]: 4039/8154 cut-off events. [2025-03-17 14:22:04,585 INFO L125 PetriNetUnfolderBase]: For 53302/53302 co-relation queries the response was YES. [2025-03-17 14:22:04,611 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. [2025-03-17 14:22:04,628 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 138 selfloop transitions, 173 changer transitions 7/329 dead transitions. [2025-03-17 14:22:04,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 329 transitions, 6720 flow [2025-03-17 14:22:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:22:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:22:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2025-03-17 14:22:04,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6328125 [2025-03-17 14:22:04,629 INFO L175 Difference]: Start difference. First operand has 204 places, 263 transitions, 5004 flow. Second operand 8 states and 243 transitions. [2025-03-17 14:22:04,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 329 transitions, 6720 flow [2025-03-17 14:22:04,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 329 transitions, 6387 flow, removed 11 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:04,850 INFO L231 Difference]: Finished difference. Result has 207 places, 297 transitions, 6060 flow [2025-03-17 14:22:04,851 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} [2025-03-17 14:22:04,851 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 161 predicate places. [2025-03-17 14:22:04,851 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 297 transitions, 6060 flow [2025-03-17 14:22:04,851 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) [2025-03-17 14:22:04,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:04,851 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] [2025-03-17 14:22:04,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-03-17 14:22:04,851 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:04,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1589396408, now seen corresponding path program 5 times [2025-03-17 14:22:04,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:04,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730767718] [2025-03-17 14:22:04,852 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:22:04,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:04,856 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:04,861 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:04,861 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:22:04,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:05,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:05,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730767718] [2025-03-17 14:22:05,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730767718] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:05,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:05,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6726930] [2025-03-17 14:22:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:05,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:05,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:05,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:05,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:05,174 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) [2025-03-17 14:22:05,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:05,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:05,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:05,985 INFO L124 PetriNetUnfolderBase]: 3976/8076 cut-off events. [2025-03-17 14:22:05,985 INFO L125 PetriNetUnfolderBase]: For 56390/56390 co-relation queries the response was YES. [2025-03-17 14:22:06,011 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. [2025-03-17 14:22:06,028 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 125 selfloop transitions, 180 changer transitions 7/323 dead transitions. [2025-03-17 14:22:06,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 323 transitions, 6851 flow [2025-03-17 14:22:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2025-03-17 14:22:06,028 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2025-03-17 14:22:06,028 INFO L175 Difference]: Start difference. First operand has 207 places, 297 transitions, 6060 flow. Second operand 9 states and 264 transitions. [2025-03-17 14:22:06,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 323 transitions, 6851 flow [2025-03-17 14:22:06,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 323 transitions, 6508 flow, removed 12 selfloop flow, removed 4 redundant places. [2025-03-17 14:22:06,230 INFO L231 Difference]: Finished difference. Result has 212 places, 298 transitions, 6164 flow [2025-03-17 14:22:06,230 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} [2025-03-17 14:22:06,231 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 166 predicate places. [2025-03-17 14:22:06,231 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 298 transitions, 6164 flow [2025-03-17 14:22:06,231 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) [2025-03-17 14:22:06,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:06,231 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] [2025-03-17 14:22:06,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2025-03-17 14:22:06,231 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:06,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash 31947048, now seen corresponding path program 4 times [2025-03-17 14:22:06,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:06,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145353459] [2025-03-17 14:22:06,232 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:22:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:06,236 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:22:06,239 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:06,239 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:22:06,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:06,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:06,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145353459] [2025-03-17 14:22:06,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145353459] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:06,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:06,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:22:06,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635701493] [2025-03-17 14:22:06,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:06,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:06,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:06,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:06,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:22:06,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:06,394 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) [2025-03-17 14:22:06,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:06,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:06,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:07,307 INFO L124 PetriNetUnfolderBase]: 3895/7877 cut-off events. [2025-03-17 14:22:07,307 INFO L125 PetriNetUnfolderBase]: For 56778/56778 co-relation queries the response was YES. [2025-03-17 14:22:07,339 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. [2025-03-17 14:22:07,361 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 134 selfloop transitions, 175 changer transitions 3/323 dead transitions. [2025-03-17 14:22:07,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 323 transitions, 6930 flow [2025-03-17 14:22:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:22:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:22:07,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2025-03-17 14:22:07,361 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6223958333333334 [2025-03-17 14:22:07,362 INFO L175 Difference]: Start difference. First operand has 212 places, 298 transitions, 6164 flow. Second operand 8 states and 239 transitions. [2025-03-17 14:22:07,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 323 transitions, 6930 flow [2025-03-17 14:22:07,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 323 transitions, 6526 flow, removed 13 selfloop flow, removed 9 redundant places. [2025-03-17 14:22:07,576 INFO L231 Difference]: Finished difference. Result has 210 places, 299 transitions, 6144 flow [2025-03-17 14:22:07,576 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} [2025-03-17 14:22:07,576 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 164 predicate places. [2025-03-17 14:22:07,576 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 299 transitions, 6144 flow [2025-03-17 14:22:07,577 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) [2025-03-17 14:22:07,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:07,577 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] [2025-03-17 14:22:07,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2025-03-17 14:22:07,577 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:07,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1613520450, now seen corresponding path program 5 times [2025-03-17 14:22:07,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:07,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892492914] [2025-03-17 14:22:07,577 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:22:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:07,581 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:07,584 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:07,584 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:22:07,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:07,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:07,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892492914] [2025-03-17 14:22:07,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892492914] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:07,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:07,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:07,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236565390] [2025-03-17 14:22:07,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:07,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:07,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:07,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:07,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:07,876 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) [2025-03-17 14:22:07,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:07,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:07,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:08,739 INFO L124 PetriNetUnfolderBase]: 4017/8064 cut-off events. [2025-03-17 14:22:08,740 INFO L125 PetriNetUnfolderBase]: For 54073/54073 co-relation queries the response was YES. [2025-03-17 14:22:08,760 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. [2025-03-17 14:22:08,775 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 137 selfloop transitions, 190 changer transitions 0/338 dead transitions. [2025-03-17 14:22:08,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 338 transitions, 7120 flow [2025-03-17 14:22:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2025-03-17 14:22:08,776 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2025-03-17 14:22:08,776 INFO L175 Difference]: Start difference. First operand has 210 places, 299 transitions, 6144 flow. Second operand 9 states and 266 transitions. [2025-03-17 14:22:08,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 338 transitions, 7120 flow [2025-03-17 14:22:08,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 338 transitions, 6774 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:22:08,936 INFO L231 Difference]: Finished difference. Result has 213 places, 305 transitions, 6316 flow [2025-03-17 14:22:08,936 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} [2025-03-17 14:22:08,936 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 167 predicate places. [2025-03-17 14:22:08,936 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 305 transitions, 6316 flow [2025-03-17 14:22:08,937 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) [2025-03-17 14:22:08,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:08,937 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] [2025-03-17 14:22:08,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2025-03-17 14:22:08,937 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:08,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:08,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1290364382, now seen corresponding path program 6 times [2025-03-17 14:22:08,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:08,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626068517] [2025-03-17 14:22:08,937 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:22:08,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:08,941 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:08,946 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:08,946 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 14:22:08,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626068517] [2025-03-17 14:22:09,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626068517] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:09,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:09,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:09,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780526614] [2025-03-17 14:22:09,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:09,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:09,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:09,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:09,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:09,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:09,307 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) [2025-03-17 14:22:09,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:09,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:09,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:10,203 INFO L124 PetriNetUnfolderBase]: 4297/8646 cut-off events. [2025-03-17 14:22:10,203 INFO L125 PetriNetUnfolderBase]: For 61668/61668 co-relation queries the response was YES. [2025-03-17 14:22:10,234 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. [2025-03-17 14:22:10,255 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 150 selfloop transitions, 196 changer transitions 0/357 dead transitions. [2025-03-17 14:22:10,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 357 transitions, 7463 flow [2025-03-17 14:22:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2025-03-17 14:22:10,330 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2025-03-17 14:22:10,330 INFO L175 Difference]: Start difference. First operand has 213 places, 305 transitions, 6316 flow. Second operand 9 states and 273 transitions. [2025-03-17 14:22:10,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 357 transitions, 7463 flow [2025-03-17 14:22:10,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 357 transitions, 7242 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:22:10,537 INFO L231 Difference]: Finished difference. Result has 219 places, 313 transitions, 6681 flow [2025-03-17 14:22:10,537 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} [2025-03-17 14:22:10,537 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 173 predicate places. [2025-03-17 14:22:10,537 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 313 transitions, 6681 flow [2025-03-17 14:22:10,537 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) [2025-03-17 14:22:10,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:10,537 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] [2025-03-17 14:22:10,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2025-03-17 14:22:10,537 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:10,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:10,538 INFO L85 PathProgramCache]: Analyzing trace with hash -924548956, now seen corresponding path program 6 times [2025-03-17 14:22:10,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:10,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693593078] [2025-03-17 14:22:10,538 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:22:10,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:10,544 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:10,549 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:10,549 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 14:22:10,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:10,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:10,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693593078] [2025-03-17 14:22:10,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693593078] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:10,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170199302] [2025-03-17 14:22:10,692 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:22:10,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:10,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:10,693 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:22:10,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 14:22:10,737 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:10,752 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:10,752 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 14:22:10,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:10,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 14:22:10,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:10,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:22:10,887 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 [2025-03-17 14:22:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:10,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:10,998 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 14:22:10,999 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 [2025-03-17 14:22:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:11,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170199302] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:11,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:22:11,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 21 [2025-03-17 14:22:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339363847] [2025-03-17 14:22:11,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:11,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:11,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:11,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:22:11,170 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:11,170 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) [2025-03-17 14:22:11,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:11,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:11,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:12,290 INFO L124 PetriNetUnfolderBase]: 4648/9529 cut-off events. [2025-03-17 14:22:12,291 INFO L125 PetriNetUnfolderBase]: For 72642/72642 co-relation queries the response was YES. [2025-03-17 14:22:12,316 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. [2025-03-17 14:22:12,334 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 166 selfloop transitions, 184 changer transitions 0/361 dead transitions. [2025-03-17 14:22:12,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 361 transitions, 7756 flow [2025-03-17 14:22:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:22:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:22:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 297 transitions. [2025-03-17 14:22:12,335 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.61875 [2025-03-17 14:22:12,335 INFO L175 Difference]: Start difference. First operand has 219 places, 313 transitions, 6681 flow. Second operand 10 states and 297 transitions. [2025-03-17 14:22:12,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 361 transitions, 7756 flow [2025-03-17 14:22:12,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 361 transitions, 7374 flow, removed 12 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:12,580 INFO L231 Difference]: Finished difference. Result has 223 places, 322 transitions, 6873 flow [2025-03-17 14:22:12,580 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} [2025-03-17 14:22:12,580 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 177 predicate places. [2025-03-17 14:22:12,580 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 322 transitions, 6873 flow [2025-03-17 14:22:12,580 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) [2025-03-17 14:22:12,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:12,580 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] [2025-03-17 14:22:12,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-17 14:22:12,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2025-03-17 14:22:12,781 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:12,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:12,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2080380108, now seen corresponding path program 7 times [2025-03-17 14:22:12,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:12,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210561572] [2025-03-17 14:22:12,781 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:22:12,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:12,785 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 14:22:12,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:12,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:12,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:12,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:12,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210561572] [2025-03-17 14:22:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210561572] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:12,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:12,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:12,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866005931] [2025-03-17 14:22:12,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:12,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:12,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:12,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:13,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:13,081 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) [2025-03-17 14:22:13,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:13,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:13,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:14,099 INFO L124 PetriNetUnfolderBase]: 4388/8910 cut-off events. [2025-03-17 14:22:14,099 INFO L125 PetriNetUnfolderBase]: For 72605/72605 co-relation queries the response was YES. [2025-03-17 14:22:14,127 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. [2025-03-17 14:22:14,150 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 148 selfloop transitions, 177 changer transitions 4/340 dead transitions. [2025-03-17 14:22:14,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 340 transitions, 7486 flow [2025-03-17 14:22:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2025-03-17 14:22:14,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-17 14:22:14,151 INFO L175 Difference]: Start difference. First operand has 223 places, 322 transitions, 6873 flow. Second operand 9 states and 261 transitions. [2025-03-17 14:22:14,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 340 transitions, 7486 flow [2025-03-17 14:22:14,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 340 transitions, 7146 flow, removed 9 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:14,432 INFO L231 Difference]: Finished difference. Result has 225 places, 315 transitions, 6714 flow [2025-03-17 14:22:14,432 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} [2025-03-17 14:22:14,432 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 179 predicate places. [2025-03-17 14:22:14,432 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 315 transitions, 6714 flow [2025-03-17 14:22:14,433 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) [2025-03-17 14:22:14,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:14,433 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] [2025-03-17 14:22:14,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2025-03-17 14:22:14,433 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:14,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2111506122, now seen corresponding path program 7 times [2025-03-17 14:22:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:14,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86460493] [2025-03-17 14:22:14,433 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:22:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:14,439 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 14:22:14,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:14,444 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:14,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:14,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:14,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86460493] [2025-03-17 14:22:14,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86460493] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:14,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:14,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:14,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670563661] [2025-03-17 14:22:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:14,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:14,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:14,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:14,813 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:14,814 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) [2025-03-17 14:22:14,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:14,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:14,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:15,830 INFO L124 PetriNetUnfolderBase]: 4573/9211 cut-off events. [2025-03-17 14:22:15,830 INFO L125 PetriNetUnfolderBase]: For 79393/79393 co-relation queries the response was YES. [2025-03-17 14:22:15,865 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. [2025-03-17 14:22:15,889 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 156 selfloop transitions, 199 changer transitions 0/366 dead transitions. [2025-03-17 14:22:15,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 366 transitions, 8240 flow [2025-03-17 14:22:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2025-03-17 14:22:15,890 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2025-03-17 14:22:15,890 INFO L175 Difference]: Start difference. First operand has 225 places, 315 transitions, 6714 flow. Second operand 9 states and 266 transitions. [2025-03-17 14:22:15,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 366 transitions, 8240 flow [2025-03-17 14:22:16,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 366 transitions, 7833 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 14:22:16,217 INFO L231 Difference]: Finished difference. Result has 224 places, 340 transitions, 7442 flow [2025-03-17 14:22:16,217 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} [2025-03-17 14:22:16,218 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 178 predicate places. [2025-03-17 14:22:16,218 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 340 transitions, 7442 flow [2025-03-17 14:22:16,218 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) [2025-03-17 14:22:16,218 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:16,218 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] [2025-03-17 14:22:16,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2025-03-17 14:22:16,218 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:16,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash -158076110, now seen corresponding path program 8 times [2025-03-17 14:22:16,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:16,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727902628] [2025-03-17 14:22:16,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:22:16,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:16,224 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:22:16,228 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:16,228 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:22:16,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:16,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:16,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727902628] [2025-03-17 14:22:16,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727902628] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:16,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:22:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24011816] [2025-03-17 14:22:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:16,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:16,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:16,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:16,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:22:16,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:16,375 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) [2025-03-17 14:22:16,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:16,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:16,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:17,332 INFO L124 PetriNetUnfolderBase]: 4713/9476 cut-off events. [2025-03-17 14:22:17,332 INFO L125 PetriNetUnfolderBase]: For 89249/89249 co-relation queries the response was YES. [2025-03-17 14:22:17,371 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. [2025-03-17 14:22:17,395 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 173 selfloop transitions, 190 changer transitions 0/374 dead transitions. [2025-03-17 14:22:17,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 374 transitions, 8502 flow [2025-03-17 14:22:17,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:22:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:22:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2025-03-17 14:22:17,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6380208333333334 [2025-03-17 14:22:17,396 INFO L175 Difference]: Start difference. First operand has 224 places, 340 transitions, 7442 flow. Second operand 8 states and 245 transitions. [2025-03-17 14:22:17,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 374 transitions, 8502 flow [2025-03-17 14:22:17,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 374 transitions, 8095 flow, removed 12 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:17,770 INFO L231 Difference]: Finished difference. Result has 227 places, 348 transitions, 7658 flow [2025-03-17 14:22:17,770 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} [2025-03-17 14:22:17,770 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 181 predicate places. [2025-03-17 14:22:17,770 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 348 transitions, 7658 flow [2025-03-17 14:22:17,770 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) [2025-03-17 14:22:17,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:17,770 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] [2025-03-17 14:22:17,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2025-03-17 14:22:17,770 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:17,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:17,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1363270156, now seen corresponding path program 9 times [2025-03-17 14:22:17,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:17,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061577969] [2025-03-17 14:22:17,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:22:17,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:17,774 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:17,778 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 28 statements. [2025-03-17 14:22:17,778 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:22:17,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:17,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:17,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061577969] [2025-03-17 14:22:17,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061577969] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:17,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:17,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:22:17,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512029992] [2025-03-17 14:22:17,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:17,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:17,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:17,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:17,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:22:17,921 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:17,921 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) [2025-03-17 14:22:17,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:17,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:17,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:18,967 INFO L124 PetriNetUnfolderBase]: 4713/9514 cut-off events. [2025-03-17 14:22:18,967 INFO L125 PetriNetUnfolderBase]: For 91952/91952 co-relation queries the response was YES. [2025-03-17 14:22:18,997 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. [2025-03-17 14:22:19,018 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 165 selfloop transitions, 185 changer transitions 3/364 dead transitions. [2025-03-17 14:22:19,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 364 transitions, 8420 flow [2025-03-17 14:22:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:22:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:22:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2025-03-17 14:22:19,019 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6197916666666666 [2025-03-17 14:22:19,019 INFO L175 Difference]: Start difference. First operand has 227 places, 348 transitions, 7658 flow. Second operand 8 states and 238 transitions. [2025-03-17 14:22:19,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 364 transitions, 8420 flow [2025-03-17 14:22:19,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 364 transitions, 8019 flow, removed 20 selfloop flow, removed 5 redundant places. [2025-03-17 14:22:19,357 INFO L231 Difference]: Finished difference. Result has 229 places, 347 transitions, 7616 flow [2025-03-17 14:22:19,357 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} [2025-03-17 14:22:19,357 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 183 predicate places. [2025-03-17 14:22:19,358 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 347 transitions, 7616 flow [2025-03-17 14:22:19,358 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) [2025-03-17 14:22:19,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:19,358 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] [2025-03-17 14:22:19,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2025-03-17 14:22:19,358 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:19,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1040374662, now seen corresponding path program 10 times [2025-03-17 14:22:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:19,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304941679] [2025-03-17 14:22:19,359 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:22:19,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:19,364 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:22:19,367 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:19,367 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:22:19,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:19,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:19,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304941679] [2025-03-17 14:22:19,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304941679] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:19,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:19,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:22:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086261692] [2025-03-17 14:22:19,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:19,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:19,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:19,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:22:19,549 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:19,550 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) [2025-03-17 14:22:19,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:19,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:19,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:20,557 INFO L124 PetriNetUnfolderBase]: 4659/9398 cut-off events. [2025-03-17 14:22:20,557 INFO L125 PetriNetUnfolderBase]: For 85615/85615 co-relation queries the response was YES. [2025-03-17 14:22:20,599 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. [2025-03-17 14:22:20,626 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 167 selfloop transitions, 173 changer transitions 3/354 dead transitions. [2025-03-17 14:22:20,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 354 transitions, 8112 flow [2025-03-17 14:22:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:22:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:22:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2025-03-17 14:22:20,627 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6197916666666666 [2025-03-17 14:22:20,627 INFO L175 Difference]: Start difference. First operand has 229 places, 347 transitions, 7616 flow. Second operand 8 states and 238 transitions. [2025-03-17 14:22:20,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 354 transitions, 8112 flow [2025-03-17 14:22:21,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 354 transitions, 7788 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:22:21,088 INFO L231 Difference]: Finished difference. Result has 230 places, 337 transitions, 7381 flow [2025-03-17 14:22:21,088 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} [2025-03-17 14:22:21,088 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 184 predicate places. [2025-03-17 14:22:21,088 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 337 transitions, 7381 flow [2025-03-17 14:22:21,088 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) [2025-03-17 14:22:21,089 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:21,089 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] [2025-03-17 14:22:21,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2025-03-17 14:22:21,089 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:21,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash 218042672, now seen corresponding path program 11 times [2025-03-17 14:22:21,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:21,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061331774] [2025-03-17 14:22:21,089 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:22:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:21,093 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:21,098 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:21,099 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:22:21,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:21,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:21,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061331774] [2025-03-17 14:22:21,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061331774] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:21,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:21,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:21,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624666802] [2025-03-17 14:22:21,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:21,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:21,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:21,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:21,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:21,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:21,375 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) [2025-03-17 14:22:21,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:21,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:21,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:22,457 INFO L124 PetriNetUnfolderBase]: 4921/9909 cut-off events. [2025-03-17 14:22:22,457 INFO L125 PetriNetUnfolderBase]: For 95320/95320 co-relation queries the response was YES. [2025-03-17 14:22:22,502 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. [2025-03-17 14:22:22,532 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 171 selfloop transitions, 200 changer transitions 0/382 dead transitions. [2025-03-17 14:22:22,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 382 transitions, 8563 flow [2025-03-17 14:22:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 270 transitions. [2025-03-17 14:22:22,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-17 14:22:22,533 INFO L175 Difference]: Start difference. First operand has 230 places, 337 transitions, 7381 flow. Second operand 9 states and 270 transitions. [2025-03-17 14:22:22,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 382 transitions, 8563 flow [2025-03-17 14:22:22,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 382 transitions, 8363 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:22:22,953 INFO L231 Difference]: Finished difference. Result has 235 places, 345 transitions, 7830 flow [2025-03-17 14:22:22,953 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} [2025-03-17 14:22:22,953 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 189 predicate places. [2025-03-17 14:22:22,953 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 345 transitions, 7830 flow [2025-03-17 14:22:22,954 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) [2025-03-17 14:22:22,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:22,954 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] [2025-03-17 14:22:22,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2025-03-17 14:22:22,954 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:22,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1005707094, now seen corresponding path program 8 times [2025-03-17 14:22:22,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:22,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299288930] [2025-03-17 14:22:22,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:22:22,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:22,957 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:22:22,960 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:22,960 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:22:22,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:23,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299288930] [2025-03-17 14:22:23,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299288930] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:23,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:23,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:23,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828296663] [2025-03-17 14:22:23,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:23,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:23,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:23,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:23,213 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:23,213 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) [2025-03-17 14:22:23,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:23,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:23,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:24,300 INFO L124 PetriNetUnfolderBase]: 4921/9980 cut-off events. [2025-03-17 14:22:24,301 INFO L125 PetriNetUnfolderBase]: For 108699/108699 co-relation queries the response was YES. [2025-03-17 14:22:24,342 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. [2025-03-17 14:22:24,369 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 166 selfloop transitions, 181 changer transitions 4/362 dead transitions. [2025-03-17 14:22:24,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 362 transitions, 8591 flow [2025-03-17 14:22:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2025-03-17 14:22:24,369 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2025-03-17 14:22:24,369 INFO L175 Difference]: Start difference. First operand has 235 places, 345 transitions, 7830 flow. Second operand 9 states and 260 transitions. [2025-03-17 14:22:24,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 362 transitions, 8591 flow [2025-03-17 14:22:24,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 362 transitions, 8065 flow, removed 32 selfloop flow, removed 7 redundant places. [2025-03-17 14:22:24,875 INFO L231 Difference]: Finished difference. Result has 236 places, 344 transitions, 7657 flow [2025-03-17 14:22:24,876 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} [2025-03-17 14:22:24,876 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 190 predicate places. [2025-03-17 14:22:24,876 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 344 transitions, 7657 flow [2025-03-17 14:22:24,876 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) [2025-03-17 14:22:24,876 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:24,876 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] [2025-03-17 14:22:24,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2025-03-17 14:22:24,876 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:24,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:24,877 INFO L85 PathProgramCache]: Analyzing trace with hash 595607060, now seen corresponding path program 9 times [2025-03-17 14:22:24,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:24,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977235876] [2025-03-17 14:22:24,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:22:24,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:24,880 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:24,883 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 28 statements. [2025-03-17 14:22:24,884 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:22:24,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:25,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:25,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977235876] [2025-03-17 14:22:25,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977235876] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:25,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465125985] [2025-03-17 14:22:25,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:25,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:25,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:25,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:25,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:25,129 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) [2025-03-17 14:22:25,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:25,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:25,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:26,288 INFO L124 PetriNetUnfolderBase]: 5039/10197 cut-off events. [2025-03-17 14:22:26,288 INFO L125 PetriNetUnfolderBase]: For 103321/103321 co-relation queries the response was YES. [2025-03-17 14:22:26,328 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. [2025-03-17 14:22:26,355 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 176 selfloop transitions, 190 changer transitions 0/377 dead transitions. [2025-03-17 14:22:26,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 377 transitions, 8710 flow [2025-03-17 14:22:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2025-03-17 14:22:26,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6087962962962963 [2025-03-17 14:22:26,356 INFO L175 Difference]: Start difference. First operand has 236 places, 344 transitions, 7657 flow. Second operand 9 states and 263 transitions. [2025-03-17 14:22:26,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 377 transitions, 8710 flow [2025-03-17 14:22:26,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 377 transitions, 8271 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 14:22:26,782 INFO L231 Difference]: Finished difference. Result has 236 places, 353 transitions, 7816 flow [2025-03-17 14:22:26,783 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} [2025-03-17 14:22:26,783 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 190 predicate places. [2025-03-17 14:22:26,783 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 353 transitions, 7816 flow [2025-03-17 14:22:26,783 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) [2025-03-17 14:22:26,783 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:26,783 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] [2025-03-17 14:22:26,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2025-03-17 14:22:26,783 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:26,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1019677970, now seen corresponding path program 10 times [2025-03-17 14:22:26,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:26,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202581463] [2025-03-17 14:22:26,784 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:22:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:26,787 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:22:26,790 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:26,790 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:22:26,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202581463] [2025-03-17 14:22:26,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202581463] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:26,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:26,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:22:26,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110211159] [2025-03-17 14:22:26,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:26,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:26,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:26,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:26,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:22:26,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:26,967 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) [2025-03-17 14:22:26,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:26,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:26,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:28,107 INFO L124 PetriNetUnfolderBase]: 4994/10125 cut-off events. [2025-03-17 14:22:28,107 INFO L125 PetriNetUnfolderBase]: For 103557/103557 co-relation queries the response was YES. [2025-03-17 14:22:28,138 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. [2025-03-17 14:22:28,163 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 182 selfloop transitions, 167 changer transitions 4/364 dead transitions. [2025-03-17 14:22:28,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 364 transitions, 8424 flow [2025-03-17 14:22:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:22:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:22:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2025-03-17 14:22:28,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-03-17 14:22:28,164 INFO L175 Difference]: Start difference. First operand has 236 places, 353 transitions, 7816 flow. Second operand 8 states and 236 transitions. [2025-03-17 14:22:28,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 364 transitions, 8424 flow [2025-03-17 14:22:28,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 364 transitions, 8035 flow, removed 18 selfloop flow, removed 7 redundant places. [2025-03-17 14:22:28,547 INFO L231 Difference]: Finished difference. Result has 236 places, 346 transitions, 7594 flow [2025-03-17 14:22:28,548 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} [2025-03-17 14:22:28,548 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 190 predicate places. [2025-03-17 14:22:28,548 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 346 transitions, 7594 flow [2025-03-17 14:22:28,548 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) [2025-03-17 14:22:28,548 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:28,548 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] [2025-03-17 14:22:28,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2025-03-17 14:22:28,548 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:28,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:28,549 INFO L85 PathProgramCache]: Analyzing trace with hash 403410952, now seen corresponding path program 11 times [2025-03-17 14:22:28,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:28,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821752938] [2025-03-17 14:22:28,549 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:22:28,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:28,553 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:28,557 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:28,557 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:22:28,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:28,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:28,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821752938] [2025-03-17 14:22:28,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821752938] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:28,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90730295] [2025-03-17 14:22:28,721 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:22:28,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:28,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:28,723 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:22:28,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 14:22:28,769 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:28,783 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:28,783 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:22:28,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:28,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 14:22:28,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:28,936 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-17 14:22:28,936 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 [2025-03-17 14:22:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:28,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:29,032 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 14:22:29,032 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 [2025-03-17 14:22:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:29,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90730295] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:29,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:29,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2025-03-17 14:22:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138494489] [2025-03-17 14:22:29,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:29,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:22:29,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:29,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:22:29,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:22:29,412 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:29,413 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) [2025-03-17 14:22:29,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:29,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:29,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:30,781 INFO L124 PetriNetUnfolderBase]: 5484/10902 cut-off events. [2025-03-17 14:22:30,781 INFO L125 PetriNetUnfolderBase]: For 108729/108729 co-relation queries the response was YES. [2025-03-17 14:22:30,822 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. [2025-03-17 14:22:30,854 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 176 selfloop transitions, 213 changer transitions 0/400 dead transitions. [2025-03-17 14:22:30,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 400 transitions, 9021 flow [2025-03-17 14:22:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2025-03-17 14:22:30,855 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2025-03-17 14:22:30,855 INFO L175 Difference]: Start difference. First operand has 236 places, 346 transitions, 7594 flow. Second operand 9 states and 267 transitions. [2025-03-17 14:22:30,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 400 transitions, 9021 flow [2025-03-17 14:22:31,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 400 transitions, 8687 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:31,332 INFO L231 Difference]: Finished difference. Result has 238 places, 367 transitions, 8204 flow [2025-03-17 14:22:31,332 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} [2025-03-17 14:22:31,332 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 192 predicate places. [2025-03-17 14:22:31,332 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 367 transitions, 8204 flow [2025-03-17 14:22:31,332 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) [2025-03-17 14:22:31,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:31,332 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] [2025-03-17 14:22:31,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-17 14:22:31,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:31,533 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:31,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:31,533 INFO L85 PathProgramCache]: Analyzing trace with hash 815567318, now seen corresponding path program 12 times [2025-03-17 14:22:31,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:31,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147993713] [2025-03-17 14:22:31,533 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:22:31,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:31,538 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:31,543 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:31,544 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 14:22:31,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:31,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:31,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147993713] [2025-03-17 14:22:31,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147993713] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:31,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:31,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:31,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832595843] [2025-03-17 14:22:31,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:31,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:31,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:31,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:31,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:31,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:31,862 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) [2025-03-17 14:22:31,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:31,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:31,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:33,086 INFO L124 PetriNetUnfolderBase]: 5384/10874 cut-off events. [2025-03-17 14:22:33,086 INFO L125 PetriNetUnfolderBase]: For 118293/118293 co-relation queries the response was YES. [2025-03-17 14:22:33,136 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. [2025-03-17 14:22:33,167 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 194 selfloop transitions, 185 changer transitions 0/390 dead transitions. [2025-03-17 14:22:33,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 390 transitions, 9089 flow [2025-03-17 14:22:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2025-03-17 14:22:33,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-17 14:22:33,167 INFO L175 Difference]: Start difference. First operand has 238 places, 367 transitions, 8204 flow. Second operand 9 states and 261 transitions. [2025-03-17 14:22:33,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 390 transitions, 9089 flow [2025-03-17 14:22:33,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 390 transitions, 8647 flow, removed 47 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:33,890 INFO L231 Difference]: Finished difference. Result has 240 places, 366 transitions, 8121 flow [2025-03-17 14:22:33,890 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} [2025-03-17 14:22:33,890 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 194 predicate places. [2025-03-17 14:22:33,890 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 366 transitions, 8121 flow [2025-03-17 14:22:33,891 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) [2025-03-17 14:22:33,891 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:33,891 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] [2025-03-17 14:22:33,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2025-03-17 14:22:33,891 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:33,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1669882240, now seen corresponding path program 12 times [2025-03-17 14:22:33,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:33,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924831775] [2025-03-17 14:22:33,892 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:22:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:33,896 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:33,900 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:33,900 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 14:22:33,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:34,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924831775] [2025-03-17 14:22:34,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924831775] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:34,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:34,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662336981] [2025-03-17 14:22:34,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:34,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:34,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:34,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:34,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:34,158 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:34,159 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) [2025-03-17 14:22:34,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:34,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:34,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:35,367 INFO L124 PetriNetUnfolderBase]: 5456/11085 cut-off events. [2025-03-17 14:22:35,367 INFO L125 PetriNetUnfolderBase]: For 119851/119995 co-relation queries the response was YES. [2025-03-17 14:22:35,418 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. [2025-03-17 14:22:35,449 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 189 selfloop transitions, 187 changer transitions 8/395 dead transitions. [2025-03-17 14:22:35,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 395 transitions, 9250 flow [2025-03-17 14:22:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 259 transitions. [2025-03-17 14:22:35,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5995370370370371 [2025-03-17 14:22:35,450 INFO L175 Difference]: Start difference. First operand has 240 places, 366 transitions, 8121 flow. Second operand 9 states and 259 transitions. [2025-03-17 14:22:35,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 395 transitions, 9250 flow [2025-03-17 14:22:36,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 395 transitions, 8839 flow, removed 18 selfloop flow, removed 7 redundant places. [2025-03-17 14:22:36,031 INFO L231 Difference]: Finished difference. Result has 242 places, 374 transitions, 8339 flow [2025-03-17 14:22:36,031 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} [2025-03-17 14:22:36,031 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 196 predicate places. [2025-03-17 14:22:36,031 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 374 transitions, 8339 flow [2025-03-17 14:22:36,031 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) [2025-03-17 14:22:36,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:36,031 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] [2025-03-17 14:22:36,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2025-03-17 14:22:36,031 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:36,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1103568570, now seen corresponding path program 13 times [2025-03-17 14:22:36,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:36,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70195152] [2025-03-17 14:22:36,032 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:22:36,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:36,038 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 14:22:36,041 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:36,041 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:36,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:36,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:36,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70195152] [2025-03-17 14:22:36,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70195152] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:36,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:36,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:36,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823264693] [2025-03-17 14:22:36,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:36,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:36,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:36,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:36,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:36,326 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:36,327 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) [2025-03-17 14:22:36,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:36,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:36,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:37,565 INFO L124 PetriNetUnfolderBase]: 5402/10968 cut-off events. [2025-03-17 14:22:37,565 INFO L125 PetriNetUnfolderBase]: For 116973/117117 co-relation queries the response was YES. [2025-03-17 14:22:37,617 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. [2025-03-17 14:22:37,648 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 195 selfloop transitions, 182 changer transitions 6/394 dead transitions. [2025-03-17 14:22:37,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 394 transitions, 9246 flow [2025-03-17 14:22:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:22:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:22:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2025-03-17 14:22:37,649 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2025-03-17 14:22:37,649 INFO L175 Difference]: Start difference. First operand has 242 places, 374 transitions, 8339 flow. Second operand 9 states and 258 transitions. [2025-03-17 14:22:37,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 394 transitions, 9246 flow [2025-03-17 14:22:38,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 394 transitions, 8895 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:38,208 INFO L231 Difference]: Finished difference. Result has 245 places, 375 transitions, 8430 flow [2025-03-17 14:22:38,209 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} [2025-03-17 14:22:38,209 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 199 predicate places. [2025-03-17 14:22:38,209 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 375 transitions, 8430 flow [2025-03-17 14:22:38,209 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) [2025-03-17 14:22:38,209 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:38,210 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] [2025-03-17 14:22:38,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2025-03-17 14:22:38,210 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:38,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:38,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1724660426, now seen corresponding path program 14 times [2025-03-17 14:22:38,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:38,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731314033] [2025-03-17 14:22:38,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:22:38,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:38,215 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:22:38,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:38,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:22:38,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:38,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:38,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731314033] [2025-03-17 14:22:38,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731314033] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:38,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:38,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:22:38,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683317562] [2025-03-17 14:22:38,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:38,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:38,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:38,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:38,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:22:38,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:38,352 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) [2025-03-17 14:22:38,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:38,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:38,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:39,645 INFO L124 PetriNetUnfolderBase]: 5533/11173 cut-off events. [2025-03-17 14:22:39,645 INFO L125 PetriNetUnfolderBase]: For 132008/132152 co-relation queries the response was YES. [2025-03-17 14:22:39,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60292 conditions, 11173 events. 5533/11173 cut-off events. For 132008/132152 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 93806 event pairs, 1566 based on Foata normal form. 110/11202 useless extension candidates. Maximal degree in co-relation 60229. Up to 8970 conditions per place. [2025-03-17 14:22:39,712 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 211 selfloop transitions, 200 changer transitions 0/422 dead transitions. [2025-03-17 14:22:39,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 422 transitions, 10047 flow [2025-03-17 14:22:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:22:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:22:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2025-03-17 14:22:39,713 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-17 14:22:39,713 INFO L175 Difference]: Start difference. First operand has 245 places, 375 transitions, 8430 flow. Second operand 8 states and 240 transitions. [2025-03-17 14:22:39,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 422 transitions, 10047 flow [2025-03-17 14:22:40,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 422 transitions, 9616 flow, removed 14 selfloop flow, removed 9 redundant places. [2025-03-17 14:22:40,284 INFO L231 Difference]: Finished difference. Result has 244 places, 400 transitions, 9143 flow [2025-03-17 14:22:40,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8029, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9143, PETRI_PLACES=244, PETRI_TRANSITIONS=400} [2025-03-17 14:22:40,285 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 198 predicate places. [2025-03-17 14:22:40,285 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 400 transitions, 9143 flow [2025-03-17 14:22:40,285 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) [2025-03-17 14:22:40,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:40,285 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] [2025-03-17 14:22:40,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2025-03-17 14:22:40,285 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:40,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:40,285 INFO L85 PathProgramCache]: Analyzing trace with hash -741825758, now seen corresponding path program 15 times [2025-03-17 14:22:40,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:40,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779138616] [2025-03-17 14:22:40,285 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:22:40,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:40,289 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:40,293 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 28 statements. [2025-03-17 14:22:40,293 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:22:40,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:40,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779138616] [2025-03-17 14:22:40,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779138616] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:40,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:40,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:22:40,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711486291] [2025-03-17 14:22:40,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:40,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:40,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:40,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:40,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:22:40,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:40,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 400 transitions, 9143 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) [2025-03-17 14:22:40,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:40,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:40,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:41,730 INFO L124 PetriNetUnfolderBase]: 5533/11176 cut-off events. [2025-03-17 14:22:41,730 INFO L125 PetriNetUnfolderBase]: For 134729/134873 co-relation queries the response was YES. [2025-03-17 14:22:41,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60898 conditions, 11176 events. 5533/11176 cut-off events. For 134729/134873 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 94001 event pairs, 1661 based on Foata normal form. 36/11145 useless extension candidates. Maximal degree in co-relation 60836. Up to 9128 conditions per place. [2025-03-17 14:22:41,811 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 207 selfloop transitions, 193 changer transitions 3/414 dead transitions. [2025-03-17 14:22:41,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 414 transitions, 10016 flow [2025-03-17 14:22:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:22:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:22:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2025-03-17 14:22:41,811 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-03-17 14:22:41,812 INFO L175 Difference]: Start difference. First operand has 244 places, 400 transitions, 9143 flow. Second operand 8 states and 236 transitions. [2025-03-17 14:22:41,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 414 transitions, 10016 flow [2025-03-17 14:22:42,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 414 transitions, 9571 flow, removed 30 selfloop flow, removed 5 redundant places. [2025-03-17 14:22:42,533 INFO L231 Difference]: Finished difference. Result has 247 places, 401 transitions, 9150 flow [2025-03-17 14:22:42,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8702, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9150, PETRI_PLACES=247, PETRI_TRANSITIONS=401} [2025-03-17 14:22:42,533 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 201 predicate places. [2025-03-17 14:22:42,533 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 401 transitions, 9150 flow [2025-03-17 14:22:42,533 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) [2025-03-17 14:22:42,533 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:42,533 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] [2025-03-17 14:22:42,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2025-03-17 14:22:42,533 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:42,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash 156451364, now seen corresponding path program 16 times [2025-03-17 14:22:42,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:42,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132030264] [2025-03-17 14:22:42,534 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:22:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:42,537 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 14:22:42,540 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:42,541 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:22:42,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:42,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:42,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132030264] [2025-03-17 14:22:42,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132030264] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:42,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:42,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:22:42,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723639110] [2025-03-17 14:22:42,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:42,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:22:42,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:42,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:22:42,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:22:42,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:42,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 401 transitions, 9150 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) [2025-03-17 14:22:42,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:42,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:42,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:44,001 INFO L124 PetriNetUnfolderBase]: 5655/11390 cut-off events. [2025-03-17 14:22:44,001 INFO L125 PetriNetUnfolderBase]: For 141431/141575 co-relation queries the response was YES. [2025-03-17 14:22:44,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62292 conditions, 11390 events. 5655/11390 cut-off events. For 141431/141575 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 95962 event pairs, 1664 based on Foata normal form. 110/11429 useless extension candidates. Maximal degree in co-relation 62229. Up to 9220 conditions per place. [2025-03-17 14:22:44,087 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 214 selfloop transitions, 204 changer transitions 0/429 dead transitions. [2025-03-17 14:22:44,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 429 transitions, 10299 flow [2025-03-17 14:22:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:22:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:22:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2025-03-17 14:22:44,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6197916666666666 [2025-03-17 14:22:44,088 INFO L175 Difference]: Start difference. First operand has 247 places, 401 transitions, 9150 flow. Second operand 8 states and 238 transitions. [2025-03-17 14:22:44,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 429 transitions, 10299 flow [2025-03-17 14:22:44,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 429 transitions, 9913 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-03-17 14:22:44,718 INFO L231 Difference]: Finished difference. Result has 249 places, 407 transitions, 9382 flow [2025-03-17 14:22:44,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8764, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9382, PETRI_PLACES=249, PETRI_TRANSITIONS=407} [2025-03-17 14:22:44,718 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 203 predicate places. [2025-03-17 14:22:44,718 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 407 transitions, 9382 flow [2025-03-17 14:22:44,718 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) [2025-03-17 14:22:44,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:44,719 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] [2025-03-17 14:22:44,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2025-03-17 14:22:44,719 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-03-17 14:22:44,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:44,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1224154472, now seen corresponding path program 17 times [2025-03-17 14:22:44,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:44,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675067575] [2025-03-17 14:22:44,719 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:22:44,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:44,723 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:22:44,728 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:22:44,728 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:22:44,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:22:44,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:44,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675067575] [2025-03-17 14:22:44,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675067575] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:44,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:44,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 14:22:44,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019525145] [2025-03-17 14:22:44,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:44,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:44,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:44,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:44,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:44,998 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-03-17 14:22:44,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 407 transitions, 9382 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) [2025-03-17 14:22:44,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:44,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-03-17 14:22:44,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand