./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-cond-3.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/unroll-cond-3.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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:34:02,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:34:02,142 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:34:02,145 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:34:02,145 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:34:02,159 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:34:02,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:34:02,160 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:34:02,160 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:34:02,160 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:34:02,160 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:34:02,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:34:02,160 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:34:02,160 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:34:02,161 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:34:02,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:34:02,161 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:34:02,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:34:02,161 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:34:02,161 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:34:02,161 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:34:02,161 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:34:02,161 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:34:02,161 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:34:02,162 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:34:02,162 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:34:02,162 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:34:02,162 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:34:02,162 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:34:02,162 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:34:02,162 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:34:02,162 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:34:02,162 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:34:02,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:34:02,163 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:34:02,164 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:34:02,164 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:34:02,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:34:02,164 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:34:02,164 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:34:02,164 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:34:02,164 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:34:02,164 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 -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2025-03-17 14:34:02,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:34:02,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:34:02,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:34:02,401 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:34:02,401 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:34:02,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2025-03-17 14:34:03,567 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8ff27fa7/30fde01830694f31a831ea125cd9d96c/FLAG91778b46a [2025-03-17 14:34:03,790 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:34:03,791 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2025-03-17 14:34:03,820 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8ff27fa7/30fde01830694f31a831ea125cd9d96c/FLAG91778b46a [2025-03-17 14:34:03,837 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8ff27fa7/30fde01830694f31a831ea125cd9d96c [2025-03-17 14:34:03,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:34:03,840 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:34:03,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:34:03,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:34:03,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:34:03,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:34:03" (1/1) ... [2025-03-17 14:34:03,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e99b1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:03, skipping insertion in model container [2025-03-17 14:34:03,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:34:03" (1/1) ... [2025-03-17 14:34:03,863 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:34:03,994 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 14:34:04,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:34:04,009 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:34:04,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:34:04,044 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:34:04,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04 WrapperNode [2025-03-17 14:34:04,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:34:04,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:34:04,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:34:04,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:34:04,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,080 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 148 [2025-03-17 14:34:04,081 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:34:04,081 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:34:04,081 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:34:04,082 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:34:04,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,090 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,104 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 14:34:04,107 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,107 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,112 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,114 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,115 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:34:04,116 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:34:04,116 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:34:04,116 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:34:04,117 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (1/1) ... [2025-03-17 14:34:04,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:34:04,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:04,146 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 14:34:04,148 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 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:34:04,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:34:04,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:34:04,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:34:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:34:04,167 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 14:34:04,252 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:34:04,254 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:34:04,580 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:34:04,580 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:34:04,753 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:34:04,753 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:34:04,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:34:04 BoogieIcfgContainer [2025-03-17 14:34:04,754 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:34:04,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:34:04,755 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:34:04,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:34:04,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:34:03" (1/3) ... [2025-03-17 14:34:04,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb7dbd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:34:04, skipping insertion in model container [2025-03-17 14:34:04,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:34:04" (2/3) ... [2025-03-17 14:34:04,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb7dbd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:34:04, skipping insertion in model container [2025-03-17 14:34:04,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:34:04" (3/3) ... [2025-03-17 14:34:04,761 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2025-03-17 14:34:04,775 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:34:04,776 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-3.wvr.c that has 3 procedures, 44 locations, 1 initial locations, 3 loop locations, and 16 error locations. [2025-03-17 14:34:04,776 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:34:04,833 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:34:04,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 110 flow [2025-03-17 14:34:04,901 INFO L124 PetriNetUnfolderBase]: 5/46 cut-off events. [2025-03-17 14:34:04,904 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:34:04,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 5/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 102 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2025-03-17 14:34:04,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 48 transitions, 110 flow [2025-03-17 14:34:04,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 45 transitions, 102 flow [2025-03-17 14:34:04,919 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:34:04,929 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;@3fa5bdc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:34:04,929 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2025-03-17 14:34:04,933 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:34:04,933 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:34:04,933 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:34:04,933 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:04,934 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:34:04,935 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:04,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash 441515, now seen corresponding path program 1 times [2025-03-17 14:34:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:04,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024194819] [2025-03-17 14:34:04,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:04,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:04,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:34:05,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:34:05,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:05,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:05,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:05,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024194819] [2025-03-17 14:34:05,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024194819] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:05,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:05,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:34:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103734059] [2025-03-17 14:34:05,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:05,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:34:05,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:05,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:34:05,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:34:05,185 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-03-17 14:34:05,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:05,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:05,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-03-17 14:34:05,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:05,323 INFO L124 PetriNetUnfolderBase]: 147/328 cut-off events. [2025-03-17 14:34:05,324 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-17 14:34:05,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 328 events. 147/328 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1622 event pairs, 94 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 510. Up to 235 conditions per place. [2025-03-17 14:34:05,329 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 23 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2025-03-17 14:34:05,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 146 flow [2025-03-17 14:34:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:34:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:34:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2025-03-17 14:34:05,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-17 14:34:05,344 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 102 flow. Second operand 3 states and 87 transitions. [2025-03-17 14:34:05,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 146 flow [2025-03-17 14:34:05,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:34:05,350 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 92 flow [2025-03-17 14:34:05,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2025-03-17 14:34:05,356 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2025-03-17 14:34:05,357 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 92 flow [2025-03-17 14:34:05,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:05,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:05,357 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:34:05,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:34:05,358 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:05,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:05,358 INFO L85 PathProgramCache]: Analyzing trace with hash 441516, now seen corresponding path program 1 times [2025-03-17 14:34:05,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:05,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843363684] [2025-03-17 14:34:05,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:05,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:05,367 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:34:05,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:34:05,391 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:05,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:05,598 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 14:34:05,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:05,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843363684] [2025-03-17 14:34:05,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843363684] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:05,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:05,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:34:05,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047180325] [2025-03-17 14:34:05,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:05,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:34:05,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:05,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:34:05,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:34:05,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-03-17 14:34:05,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 14:34:05,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:05,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-03-17 14:34:05,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:05,742 INFO L124 PetriNetUnfolderBase]: 148/331 cut-off events. [2025-03-17 14:34:05,742 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-17 14:34:05,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 331 events. 148/331 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1647 event pairs, 94 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 561. Up to 240 conditions per place. [2025-03-17 14:34:05,747 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 26 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2025-03-17 14:34:05,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 158 flow [2025-03-17 14:34:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:34:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:34:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2025-03-17 14:34:05,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-17 14:34:05,749 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 92 flow. Second operand 3 states and 90 transitions. [2025-03-17 14:34:05,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 158 flow [2025-03-17 14:34:05,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:34:05,751 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 107 flow [2025-03-17 14:34:05,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2025-03-17 14:34:05,751 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2025-03-17 14:34:05,752 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 107 flow [2025-03-17 14:34:05,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 14:34:05,752 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:05,752 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:34:05,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:34:05,752 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:05,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash 424310747, now seen corresponding path program 1 times [2025-03-17 14:34:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:05,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31191255] [2025-03-17 14:34:05,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:05,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:05,760 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:34:05,770 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:34:05,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:05,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:05,995 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 14:34:05,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:05,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31191255] [2025-03-17 14:34:05,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31191255] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:05,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933098750] [2025-03-17 14:34:05,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:05,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:05,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:05,999 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 14:34:06,000 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 14:34:06,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:34:06,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:34:06,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:06,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:06,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:34:06,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:06,091 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 14:34:06,268 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 14:34:06,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:06,373 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 14:34:06,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933098750] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:06,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:06,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:34:06,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077574195] [2025-03-17 14:34:06,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:06,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:34:06,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:06,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:34:06,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:34:06,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-03-17 14:34:06,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:06,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:06,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-03-17 14:34:06,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:06,742 INFO L124 PetriNetUnfolderBase]: 148/330 cut-off events. [2025-03-17 14:34:06,743 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-17 14:34:06,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 330 events. 148/330 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1620 event pairs, 94 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 561. Up to 236 conditions per place. [2025-03-17 14:34:06,745 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 22 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2025-03-17 14:34:06,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 161 flow [2025-03-17 14:34:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:34:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:34:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2025-03-17 14:34:06,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5375 [2025-03-17 14:34:06,749 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 107 flow. Second operand 5 states and 129 transitions. [2025-03-17 14:34:06,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 161 flow [2025-03-17 14:34:06,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:34:06,751 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 120 flow [2025-03-17 14:34:06,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2025-03-17 14:34:06,753 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2025-03-17 14:34:06,753 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 120 flow [2025-03-17 14:34:06,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:06,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:06,754 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:34:06,761 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 14:34:06,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:06,955 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:06,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash 271238712, now seen corresponding path program 1 times [2025-03-17 14:34:06,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:06,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551767335] [2025-03-17 14:34:06,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:06,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:06,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:34:06,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:34:06,964 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:06,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:07,010 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 14:34:07,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:07,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551767335] [2025-03-17 14:34:07,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551767335] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:07,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:07,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:34:07,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852048669] [2025-03-17 14:34:07,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:07,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:34:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:07,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:34:07,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:34:07,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-03-17 14:34:07,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 14:34:07,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:07,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-03-17 14:34:07,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:07,078 INFO L124 PetriNetUnfolderBase]: 147/329 cut-off events. [2025-03-17 14:34:07,078 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-17 14:34:07,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 329 events. 147/329 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1629 event pairs, 94 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 561. Up to 238 conditions per place. [2025-03-17 14:34:07,080 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 25 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2025-03-17 14:34:07,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 168 flow [2025-03-17 14:34:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:34:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:34:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2025-03-17 14:34:07,082 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2025-03-17 14:34:07,082 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 120 flow. Second operand 3 states and 91 transitions. [2025-03-17 14:34:07,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 168 flow [2025-03-17 14:34:07,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 158 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 14:34:07,083 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 108 flow [2025-03-17 14:34:07,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2025-03-17 14:34:07,084 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2025-03-17 14:34:07,084 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 108 flow [2025-03-17 14:34:07,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 14:34:07,084 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:07,084 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:07,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:34:07,084 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:07,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash 555649192, now seen corresponding path program 1 times [2025-03-17 14:34:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:07,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141635580] [2025-03-17 14:34:07,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:07,092 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:34:07,097 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:34:07,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:07,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:07,126 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 14:34:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141635580] [2025-03-17 14:34:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141635580] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:07,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:07,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:34:07,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569287852] [2025-03-17 14:34:07,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:07,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:34:07,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:07,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:34:07,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:34:07,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:34:07,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 14:34:07,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:07,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:34:07,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:07,238 INFO L124 PetriNetUnfolderBase]: 147/293 cut-off events. [2025-03-17 14:34:07,238 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-17 14:34:07,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 293 events. 147/293 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1217 event pairs, 94 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 535. Up to 234 conditions per place. [2025-03-17 14:34:07,240 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 25 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2025-03-17 14:34:07,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 150 flow [2025-03-17 14:34:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:34:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:34:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2025-03-17 14:34:07,242 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.453125 [2025-03-17 14:34:07,242 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 108 flow. Second operand 4 states and 87 transitions. [2025-03-17 14:34:07,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 150 flow [2025-03-17 14:34:07,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:34:07,244 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 96 flow [2025-03-17 14:34:07,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2025-03-17 14:34:07,244 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2025-03-17 14:34:07,246 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 96 flow [2025-03-17 14:34:07,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 14:34:07,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:07,246 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:07,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:34:07,246 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:07,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash 555649193, now seen corresponding path program 1 times [2025-03-17 14:34:07,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:07,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821182462] [2025-03-17 14:34:07,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:07,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:07,251 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:34:07,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:34:07,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:07,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:07,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:07,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821182462] [2025-03-17 14:34:07,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821182462] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:07,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762989292] [2025-03-17 14:34:07,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:07,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:07,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:07,423 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 14:34:07,424 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 14:34:07,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:34:07,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:34:07,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:07,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:07,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:34:07,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:07,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:07,600 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 14:34:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:07,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762989292] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:07,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:07,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2025-03-17 14:34:07,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136150289] [2025-03-17 14:34:07,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:07,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:34:07,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:07,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:34:07,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:34:07,774 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-03-17 14:34:07,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 96 flow. Second operand has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 14:34:07,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:07,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-03-17 14:34:07,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:07,969 INFO L124 PetriNetUnfolderBase]: 307/551 cut-off events. [2025-03-17 14:34:07,969 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-17 14:34:07,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 551 events. 307/551 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2576 event pairs, 100 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 1043. Up to 277 conditions per place. [2025-03-17 14:34:07,972 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 43 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2025-03-17 14:34:07,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 231 flow [2025-03-17 14:34:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:34:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:34:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2025-03-17 14:34:07,975 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-03-17 14:34:07,975 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 96 flow. Second operand 5 states and 148 transitions. [2025-03-17 14:34:07,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 231 flow [2025-03-17 14:34:07,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 56 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:34:07,977 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 109 flow [2025-03-17 14:34:07,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=109, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2025-03-17 14:34:07,977 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2025-03-17 14:34:07,977 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 109 flow [2025-03-17 14:34:07,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 14:34:07,978 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:07,978 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:07,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:34:08,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-17 14:34:08,179 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:08,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1374227443, now seen corresponding path program 1 times [2025-03-17 14:34:08,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:08,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804481376] [2025-03-17 14:34:08,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:08,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:08,185 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:34:08,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:34:08,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:08,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:08,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804481376] [2025-03-17 14:34:08,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804481376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434873601] [2025-03-17 14:34:08,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:08,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:08,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:08,304 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 14:34:08,305 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 14:34:08,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:34:08,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:34:08,357 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:08,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:08,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:34:08,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:08,365 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 14:34:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:08,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:08,471 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 14:34:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434873601] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:08,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:34:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2025-03-17 14:34:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193399110] [2025-03-17 14:34:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:08,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:34:08,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:08,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:34:08,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:34:08,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-17 14:34:08,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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 14:34:08,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:08,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-17 14:34:08,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:08,622 INFO L124 PetriNetUnfolderBase]: 540/931 cut-off events. [2025-03-17 14:34:08,622 INFO L125 PetriNetUnfolderBase]: For 100/128 co-relation queries the response was YES. [2025-03-17 14:34:08,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 931 events. 540/931 cut-off events. For 100/128 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4352 event pairs, 123 based on Foata normal form. 0/742 useless extension candidates. Maximal degree in co-relation 1920. Up to 599 conditions per place. [2025-03-17 14:34:08,626 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 44 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2025-03-17 14:34:08,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 246 flow [2025-03-17 14:34:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:34:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:34:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-03-17 14:34:08,628 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-17 14:34:08,628 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 109 flow. Second operand 4 states and 112 transitions. [2025-03-17 14:34:08,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 246 flow [2025-03-17 14:34:08,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:34:08,629 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 135 flow [2025-03-17 14:34:08,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2025-03-17 14:34:08,630 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2025-03-17 14:34:08,630 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 135 flow [2025-03-17 14:34:08,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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 14:34:08,630 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:08,630 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:08,636 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 14:34:08,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:08,833 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:08,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:08,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1402944812, now seen corresponding path program 1 times [2025-03-17 14:34:08,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:08,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156087273] [2025-03-17 14:34:08,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:08,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:08,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:34:08,845 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:34:08,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:08,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:08,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:08,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156087273] [2025-03-17 14:34:08,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156087273] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:08,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917405582] [2025-03-17 14:34:08,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:08,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:08,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:08,949 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 14:34:08,951 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 14:34:08,985 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:34:08,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:34:08,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:08,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:08,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:34:08,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:09,101 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:09,143 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 36 treesize of output 32 [2025-03-17 14:34:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:09,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917405582] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:09,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:09,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-03-17 14:34:09,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072547565] [2025-03-17 14:34:09,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:09,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:34:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:09,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:34:09,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:34:09,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-03-17 14:34:09,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 135 flow. Second operand has 16 states, 16 states have (on average 21.8125) internal successors, (349), 16 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 14:34:09,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:09,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-03-17 14:34:09,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:09,929 INFO L124 PetriNetUnfolderBase]: 890/1643 cut-off events. [2025-03-17 14:34:09,929 INFO L125 PetriNetUnfolderBase]: For 199/214 co-relation queries the response was YES. [2025-03-17 14:34:09,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3631 conditions, 1643 events. 890/1643 cut-off events. For 199/214 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9630 event pairs, 520 based on Foata normal form. 0/1444 useless extension candidates. Maximal degree in co-relation 1951. Up to 741 conditions per place. [2025-03-17 14:34:09,937 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 88 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2025-03-17 14:34:09,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 106 transitions, 530 flow [2025-03-17 14:34:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:34:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:34:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2025-03-17 14:34:09,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6380208333333334 [2025-03-17 14:34:09,939 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 135 flow. Second operand 8 states and 245 transitions. [2025-03-17 14:34:09,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 106 transitions, 530 flow [2025-03-17 14:34:09,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 106 transitions, 514 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:34:09,940 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 202 flow [2025-03-17 14:34:09,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=202, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2025-03-17 14:34:09,941 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2025-03-17 14:34:09,941 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 202 flow [2025-03-17 14:34:09,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.8125) internal successors, (349), 16 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 14:34:09,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:09,941 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:09,947 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 14:34:10,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:10,146 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:10,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash -348621738, now seen corresponding path program 1 times [2025-03-17 14:34:10,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:10,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203595920] [2025-03-17 14:34:10,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:10,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:10,151 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:34:10,154 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:34:10,155 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:10,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:10,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:10,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203595920] [2025-03-17 14:34:10,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203595920] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:10,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329876698] [2025-03-17 14:34:10,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:10,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:10,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:10,240 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 14:34:10,242 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 14:34:10,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:34:10,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:34:10,284 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:10,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:10,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:34:10,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:10,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:10,375 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 14:34:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:10,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329876698] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:10,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:10,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:34:10,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809140677] [2025-03-17 14:34:10,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:10,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:34:10,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:10,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:34:10,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:34:10,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-17 14:34:10,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 202 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:10,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:10,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-17 14:34:10,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:10,920 INFO L124 PetriNetUnfolderBase]: 1125/1925 cut-off events. [2025-03-17 14:34:10,920 INFO L125 PetriNetUnfolderBase]: For 1028/1084 co-relation queries the response was YES. [2025-03-17 14:34:10,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4743 conditions, 1925 events. 1125/1925 cut-off events. For 1028/1084 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10314 event pairs, 540 based on Foata normal form. 0/1726 useless extension candidates. Maximal degree in co-relation 3946. Up to 1451 conditions per place. [2025-03-17 14:34:10,928 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 63 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2025-03-17 14:34:10,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 457 flow [2025-03-17 14:34:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:34:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:34:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2025-03-17 14:34:10,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2025-03-17 14:34:10,930 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 202 flow. Second operand 7 states and 176 transitions. [2025-03-17 14:34:10,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 457 flow [2025-03-17 14:34:10,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 449 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-17 14:34:10,934 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 250 flow [2025-03-17 14:34:10,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=250, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2025-03-17 14:34:10,934 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 14 predicate places. [2025-03-17 14:34:10,934 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 250 flow [2025-03-17 14:34:10,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:10,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:10,934 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:10,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:34:11,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:11,135 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:11,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1729781533, now seen corresponding path program 2 times [2025-03-17 14:34:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:11,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468231790] [2025-03-17 14:34:11,136 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:34:11,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:11,141 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-17 14:34:11,150 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 12 statements. [2025-03-17 14:34:11,151 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:34:11,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:34:11,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468231790] [2025-03-17 14:34:11,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468231790] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167429137] [2025-03-17 14:34:11,253 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:34:11,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:11,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:11,254 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 14:34:11,256 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 14:34:11,291 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-17 14:34:11,302 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 12 statements. [2025-03-17 14:34:11,303 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:34:11,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:11,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-17 14:34:11,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:11,315 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 14:34:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:34:11,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:34:11,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167429137] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:11,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:11,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2025-03-17 14:34:11,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412574995] [2025-03-17 14:34:11,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:11,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:34:11,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:11,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:34:11,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:34:11,690 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-03-17 14:34:11,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 250 flow. Second operand has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 14:34:11,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:11,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-03-17 14:34:11,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:11,930 INFO L124 PetriNetUnfolderBase]: 879/1625 cut-off events. [2025-03-17 14:34:11,930 INFO L125 PetriNetUnfolderBase]: For 629/629 co-relation queries the response was YES. [2025-03-17 14:34:11,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4083 conditions, 1625 events. 879/1625 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9534 event pairs, 474 based on Foata normal form. 0/1579 useless extension candidates. Maximal degree in co-relation 3509. Up to 1036 conditions per place. [2025-03-17 14:34:11,936 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 52 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2025-03-17 14:34:11,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 70 transitions, 446 flow [2025-03-17 14:34:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:34:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:34:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2025-03-17 14:34:11,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2025-03-17 14:34:11,937 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 250 flow. Second operand 5 states and 139 transitions. [2025-03-17 14:34:11,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 70 transitions, 446 flow [2025-03-17 14:34:11,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 70 transitions, 429 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:34:11,940 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 248 flow [2025-03-17 14:34:11,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2025-03-17 14:34:11,941 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2025-03-17 14:34:11,941 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 248 flow [2025-03-17 14:34:11,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 14:34:11,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:11,941 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:11,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:34:12,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:12,145 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:12,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:12,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1193382021, now seen corresponding path program 2 times [2025-03-17 14:34:12,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:12,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278886085] [2025-03-17 14:34:12,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:34:12,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:12,149 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-17 14:34:12,157 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 13 statements. [2025-03-17 14:34:12,157 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:34:12,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:34:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278886085] [2025-03-17 14:34:12,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278886085] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:12,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:12,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:34:12,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776115049] [2025-03-17 14:34:12,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:12,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:34:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:12,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:34:12,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:34:12,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-17 14:34:12,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 14:34:12,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:12,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-17 14:34:12,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:12,522 INFO L124 PetriNetUnfolderBase]: 1148/1952 cut-off events. [2025-03-17 14:34:12,523 INFO L125 PetriNetUnfolderBase]: For 1955/1955 co-relation queries the response was YES. [2025-03-17 14:34:12,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5341 conditions, 1952 events. 1148/1952 cut-off events. For 1955/1955 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10402 event pairs, 246 based on Foata normal form. 16/1791 useless extension candidates. Maximal degree in co-relation 4463. Up to 1236 conditions per place. [2025-03-17 14:34:12,531 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 63 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2025-03-17 14:34:12,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 523 flow [2025-03-17 14:34:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:34:12,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:34:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2025-03-17 14:34:12,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2025-03-17 14:34:12,533 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 248 flow. Second operand 5 states and 133 transitions. [2025-03-17 14:34:12,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 523 flow [2025-03-17 14:34:12,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 481 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:34:12,538 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 259 flow [2025-03-17 14:34:12,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2025-03-17 14:34:12,539 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 14 predicate places. [2025-03-17 14:34:12,539 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 259 flow [2025-03-17 14:34:12,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 14:34:12,539 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:12,539 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:12,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 14:34:12,540 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:12,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash -19041441, now seen corresponding path program 1 times [2025-03-17 14:34:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:12,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304162596] [2025-03-17 14:34:12,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:12,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:12,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:34:12,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:34:12,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:12,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:12,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:12,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304162596] [2025-03-17 14:34:12,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304162596] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:12,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483196123] [2025-03-17 14:34:12,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:12,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:12,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:12,678 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 14:34:12,680 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 14:34:12,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:34:12,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:34:12,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:12,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:12,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:34:12,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:12,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:12,853 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 36 treesize of output 32 [2025-03-17 14:34:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:34:12,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483196123] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:12,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:12,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-03-17 14:34:12,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596508395] [2025-03-17 14:34:12,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:12,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:34:12,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:12,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:34:12,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:34:13,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-17 14:34:13,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 259 flow. Second operand has 16 states, 16 states have (on average 18.1875) internal successors, (291), 16 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 14:34:13,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:13,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-17 14:34:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:13,439 INFO L124 PetriNetUnfolderBase]: 1033/1757 cut-off events. [2025-03-17 14:34:13,439 INFO L125 PetriNetUnfolderBase]: For 1405/1405 co-relation queries the response was YES. [2025-03-17 14:34:13,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4640 conditions, 1757 events. 1033/1757 cut-off events. For 1405/1405 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9047 event pairs, 561 based on Foata normal form. 16/1670 useless extension candidates. Maximal degree in co-relation 4005. Up to 892 conditions per place. [2025-03-17 14:34:13,447 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 74 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2025-03-17 14:34:13,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 579 flow [2025-03-17 14:34:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:34:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:34:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2025-03-17 14:34:13,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.546875 [2025-03-17 14:34:13,448 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 259 flow. Second operand 8 states and 210 transitions. [2025-03-17 14:34:13,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 579 flow [2025-03-17 14:34:13,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 561 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:34:13,452 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 331 flow [2025-03-17 14:34:13,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2025-03-17 14:34:13,453 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2025-03-17 14:34:13,453 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 331 flow [2025-03-17 14:34:13,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.1875) internal successors, (291), 16 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 14:34:13,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:13,453 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:13,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 14:34:13,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:13,653 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:13,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:13,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1659862517, now seen corresponding path program 1 times [2025-03-17 14:34:13,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:13,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495000923] [2025-03-17 14:34:13,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:13,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:34:13,662 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:34:13,662 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:13,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:13,814 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 14:34:13,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:13,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495000923] [2025-03-17 14:34:13,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495000923] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:13,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928871874] [2025-03-17 14:34:13,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:13,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:13,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:13,816 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 14:34:13,818 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 14:34:13,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:34:13,866 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:34:13,866 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:13,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:13,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:34:13,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:13,872 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 14:34:13,931 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 14:34:13,931 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:34:13,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928871874] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:13,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:34:13,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-03-17 14:34:13,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308839510] [2025-03-17 14:34:13,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:13,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:34:13,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:13,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:34:13,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:34:13,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-17 14:34:13,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 14:34:13,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:13,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-17 14:34:13,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:14,105 INFO L124 PetriNetUnfolderBase]: 882/1514 cut-off events. [2025-03-17 14:34:14,105 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2025-03-17 14:34:14,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 1514 events. 882/1514 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7935 event pairs, 288 based on Foata normal form. 32/1497 useless extension candidates. Maximal degree in co-relation 3794. Up to 757 conditions per place. [2025-03-17 14:34:14,112 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 38 selfloop transitions, 20 changer transitions 0/62 dead transitions. [2025-03-17 14:34:14,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 460 flow [2025-03-17 14:34:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:34:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:34:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2025-03-17 14:34:14,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-17 14:34:14,113 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 331 flow. Second operand 5 states and 116 transitions. [2025-03-17 14:34:14,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 460 flow [2025-03-17 14:34:14,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 62 transitions, 443 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-17 14:34:14,117 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 322 flow [2025-03-17 14:34:14,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2025-03-17 14:34:14,118 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 14 predicate places. [2025-03-17 14:34:14,118 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 322 flow [2025-03-17 14:34:14,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 14:34:14,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:14,118 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:14,125 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 14:34:14,319 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,SelfDestructingSolverStorable12 [2025-03-17 14:34:14,319 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:14,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1924376214, now seen corresponding path program 1 times [2025-03-17 14:34:14,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:14,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758424421] [2025-03-17 14:34:14,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:14,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:14,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:34:14,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:34:14,328 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:14,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:14,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758424421] [2025-03-17 14:34:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758424421] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:14,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:14,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:34:14,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482840392] [2025-03-17 14:34:14,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:14,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:34:14,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:14,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:34:14,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:34:14,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-03-17 14:34:14,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 14:34:14,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:14,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-03-17 14:34:14,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:14,463 INFO L124 PetriNetUnfolderBase]: 917/1556 cut-off events. [2025-03-17 14:34:14,463 INFO L125 PetriNetUnfolderBase]: For 1996/1996 co-relation queries the response was YES. [2025-03-17 14:34:14,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4808 conditions, 1556 events. 917/1556 cut-off events. For 1996/1996 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7864 event pairs, 233 based on Foata normal form. 2/1516 useless extension candidates. Maximal degree in co-relation 4153. Up to 1170 conditions per place. [2025-03-17 14:34:14,470 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 59 selfloop transitions, 9 changer transitions 1/73 dead transitions. [2025-03-17 14:34:14,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 573 flow [2025-03-17 14:34:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:34:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:34:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2025-03-17 14:34:14,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7361111111111112 [2025-03-17 14:34:14,471 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 322 flow. Second operand 3 states and 106 transitions. [2025-03-17 14:34:14,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 573 flow [2025-03-17 14:34:14,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 519 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:34:14,476 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 389 flow [2025-03-17 14:34:14,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2025-03-17 14:34:14,477 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2025-03-17 14:34:14,477 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 389 flow [2025-03-17 14:34:14,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 14:34:14,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:14,477 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:14,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 14:34:14,477 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:14,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash -966180076, now seen corresponding path program 1 times [2025-03-17 14:34:14,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:14,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109862575] [2025-03-17 14:34:14,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:14,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:34:14,485 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:34:14,485 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:14,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:14,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:14,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109862575] [2025-03-17 14:34:14,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109862575] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:14,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:14,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:34:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688974484] [2025-03-17 14:34:14,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:14,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:34:14,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:14,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:34:14,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:34:14,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-03-17 14:34:14,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 14:34:14,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:14,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-03-17 14:34:14,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:14,793 INFO L124 PetriNetUnfolderBase]: 1038/1744 cut-off events. [2025-03-17 14:34:14,794 INFO L125 PetriNetUnfolderBase]: For 2045/2045 co-relation queries the response was YES. [2025-03-17 14:34:14,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5286 conditions, 1744 events. 1038/1744 cut-off events. For 2045/2045 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9183 event pairs, 373 based on Foata normal form. 18/1762 useless extension candidates. Maximal degree in co-relation 4556. Up to 964 conditions per place. [2025-03-17 14:34:14,804 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 115 selfloop transitions, 9 changer transitions 0/126 dead transitions. [2025-03-17 14:34:14,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 126 transitions, 1020 flow [2025-03-17 14:34:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:34:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:34:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2025-03-17 14:34:14,806 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6791666666666667 [2025-03-17 14:34:14,806 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 389 flow. Second operand 5 states and 163 transitions. [2025-03-17 14:34:14,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 126 transitions, 1020 flow [2025-03-17 14:34:14,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 126 transitions, 997 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:34:14,812 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 453 flow [2025-03-17 14:34:14,812 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2025-03-17 14:34:14,813 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2025-03-17 14:34:14,813 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 453 flow [2025-03-17 14:34:14,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 14:34:14,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:14,814 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:14,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 14:34:14,814 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:14,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:14,814 INFO L85 PathProgramCache]: Analyzing trace with hash 636010154, now seen corresponding path program 2 times [2025-03-17 14:34:14,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:14,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265814773] [2025-03-17 14:34:14,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:34:14,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:14,821 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 14:34:14,828 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-03-17 14:34:14,828 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:34:14,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:14,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:14,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265814773] [2025-03-17 14:34:14,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265814773] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:14,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:14,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:34:14,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689877484] [2025-03-17 14:34:14,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:14,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:34:14,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:14,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:34:14,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:34:14,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:14,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 453 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 14:34:14,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:14,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:14,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:15,056 INFO L124 PetriNetUnfolderBase]: 888/1476 cut-off events. [2025-03-17 14:34:15,056 INFO L125 PetriNetUnfolderBase]: For 2659/2659 co-relation queries the response was YES. [2025-03-17 14:34:15,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5033 conditions, 1476 events. 888/1476 cut-off events. For 2659/2659 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6837 event pairs, 461 based on Foata normal form. 32/1508 useless extension candidates. Maximal degree in co-relation 4396. Up to 1147 conditions per place. [2025-03-17 14:34:15,062 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 71 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2025-03-17 14:34:15,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 729 flow [2025-03-17 14:34:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:34:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:34:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2025-03-17 14:34:15,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-03-17 14:34:15,063 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 453 flow. Second operand 4 states and 118 transitions. [2025-03-17 14:34:15,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 729 flow [2025-03-17 14:34:15,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 702 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-17 14:34:15,068 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 448 flow [2025-03-17 14:34:15,068 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=448, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2025-03-17 14:34:15,068 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2025-03-17 14:34:15,068 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 448 flow [2025-03-17 14:34:15,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 14:34:15,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:15,068 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:15,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 14:34:15,068 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:15,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:15,069 INFO L85 PathProgramCache]: Analyzing trace with hash 441442257, now seen corresponding path program 1 times [2025-03-17 14:34:15,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:15,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873380409] [2025-03-17 14:34:15,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:15,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:15,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:34:15,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:34:15,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:15,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:15,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:15,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873380409] [2025-03-17 14:34:15,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873380409] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:15,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:15,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:34:15,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978002179] [2025-03-17 14:34:15,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:15,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:34:15,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:15,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:34:15,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:34:15,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:15,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 448 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 14:34:15,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:15,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:15,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:15,420 INFO L124 PetriNetUnfolderBase]: 1028/1728 cut-off events. [2025-03-17 14:34:15,420 INFO L125 PetriNetUnfolderBase]: For 3625/3625 co-relation queries the response was YES. [2025-03-17 14:34:15,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6212 conditions, 1728 events. 1028/1728 cut-off events. For 3625/3625 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8913 event pairs, 319 based on Foata normal form. 24/1752 useless extension candidates. Maximal degree in co-relation 5557. Up to 860 conditions per place. [2025-03-17 14:34:15,426 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 104 selfloop transitions, 20 changer transitions 0/125 dead transitions. [2025-03-17 14:34:15,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 125 transitions, 1092 flow [2025-03-17 14:34:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:34:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:34:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2025-03-17 14:34:15,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-03-17 14:34:15,428 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 448 flow. Second operand 6 states and 184 transitions. [2025-03-17 14:34:15,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 125 transitions, 1092 flow [2025-03-17 14:34:15,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 125 transitions, 1047 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-17 14:34:15,435 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 631 flow [2025-03-17 14:34:15,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=631, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2025-03-17 14:34:15,436 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 29 predicate places. [2025-03-17 14:34:15,436 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 631 flow [2025-03-17 14:34:15,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 14:34:15,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:15,436 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:15,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-17 14:34:15,436 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:15,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:15,437 INFO L85 PathProgramCache]: Analyzing trace with hash -399042161, now seen corresponding path program 2 times [2025-03-17 14:34:15,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:15,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211370387] [2025-03-17 14:34:15,437 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:34:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:15,441 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 14:34:15,447 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-03-17 14:34:15,447 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:34:15,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:15,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:15,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211370387] [2025-03-17 14:34:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211370387] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:15,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:15,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:34:15,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411703624] [2025-03-17 14:34:15,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:15,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:34:15,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:15,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:34:15,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:34:15,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:15,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 631 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 14:34:15,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:15,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:15,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:15,750 INFO L124 PetriNetUnfolderBase]: 1278/2166 cut-off events. [2025-03-17 14:34:15,750 INFO L125 PetriNetUnfolderBase]: For 6144/6144 co-relation queries the response was YES. [2025-03-17 14:34:15,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8261 conditions, 2166 events. 1278/2166 cut-off events. For 6144/6144 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11115 event pairs, 473 based on Foata normal form. 24/2190 useless extension candidates. Maximal degree in co-relation 7474. Up to 1129 conditions per place. [2025-03-17 14:34:15,758 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 105 selfloop transitions, 27 changer transitions 0/133 dead transitions. [2025-03-17 14:34:15,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 1278 flow [2025-03-17 14:34:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:34:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:34:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2025-03-17 14:34:15,759 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2025-03-17 14:34:15,759 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 631 flow. Second operand 7 states and 197 transitions. [2025-03-17 14:34:15,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 1278 flow [2025-03-17 14:34:15,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 133 transitions, 1244 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-03-17 14:34:15,770 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 794 flow [2025-03-17 14:34:15,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=794, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2025-03-17 14:34:15,771 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 38 predicate places. [2025-03-17 14:34:15,771 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 794 flow [2025-03-17 14:34:15,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 14:34:15,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:15,771 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:15,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 14:34:15,771 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:15,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1860223245, now seen corresponding path program 3 times [2025-03-17 14:34:15,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:15,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547141528] [2025-03-17 14:34:15,772 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:34:15,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:15,779 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-03-17 14:34:15,784 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-03-17 14:34:15,784 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:34:15,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:15,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:15,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547141528] [2025-03-17 14:34:15,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547141528] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:15,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:15,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:34:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383239583] [2025-03-17 14:34:15,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:15,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:34:15,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:15,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:34:15,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:34:15,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:15,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 794 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 14:34:15,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:15,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:15,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:16,077 INFO L124 PetriNetUnfolderBase]: 1258/2110 cut-off events. [2025-03-17 14:34:16,077 INFO L125 PetriNetUnfolderBase]: For 8269/8269 co-relation queries the response was YES. [2025-03-17 14:34:16,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8586 conditions, 2110 events. 1258/2110 cut-off events. For 8269/8269 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10967 event pairs, 463 based on Foata normal form. 6/2116 useless extension candidates. Maximal degree in co-relation 7787. Up to 1064 conditions per place. [2025-03-17 14:34:16,086 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 95 selfloop transitions, 28 changer transitions 0/124 dead transitions. [2025-03-17 14:34:16,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 1320 flow [2025-03-17 14:34:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:34:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:34:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2025-03-17 14:34:16,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2025-03-17 14:34:16,087 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 794 flow. Second operand 5 states and 155 transitions. [2025-03-17 14:34:16,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 1320 flow [2025-03-17 14:34:16,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 1266 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-03-17 14:34:16,099 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 880 flow [2025-03-17 14:34:16,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=880, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2025-03-17 14:34:16,100 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 41 predicate places. [2025-03-17 14:34:16,100 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 880 flow [2025-03-17 14:34:16,100 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 14:34:16,100 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:16,100 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:16,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 14:34:16,101 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:16,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:16,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2130699935, now seen corresponding path program 4 times [2025-03-17 14:34:16,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:16,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293767026] [2025-03-17 14:34:16,102 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:34:16,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:16,108 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-17 14:34:16,115 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:34:16,116 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:34:16,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:16,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:16,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293767026] [2025-03-17 14:34:16,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293767026] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:16,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:16,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:34:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913895156] [2025-03-17 14:34:16,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:16,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:34:16,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:16,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:34:16,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:34:16,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:16,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 880 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 14:34:16,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:16,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:16,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:16,365 INFO L124 PetriNetUnfolderBase]: 1252/2104 cut-off events. [2025-03-17 14:34:16,365 INFO L125 PetriNetUnfolderBase]: For 9992/9992 co-relation queries the response was YES. [2025-03-17 14:34:16,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 2104 events. 1252/2104 cut-off events. For 9992/9992 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10607 event pairs, 647 based on Foata normal form. 6/2110 useless extension candidates. Maximal degree in co-relation 8039. Up to 1651 conditions per place. [2025-03-17 14:34:16,374 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 77 selfloop transitions, 36 changer transitions 0/114 dead transitions. [2025-03-17 14:34:16,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1361 flow [2025-03-17 14:34:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:34:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:34:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2025-03-17 14:34:16,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-17 14:34:16,375 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 880 flow. Second operand 5 states and 145 transitions. [2025-03-17 14:34:16,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1361 flow [2025-03-17 14:34:16,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 114 transitions, 1305 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-17 14:34:16,389 INFO L231 Difference]: Finished difference. Result has 93 places, 96 transitions, 1129 flow [2025-03-17 14:34:16,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1129, PETRI_PLACES=93, PETRI_TRANSITIONS=96} [2025-03-17 14:34:16,390 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 46 predicate places. [2025-03-17 14:34:16,390 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 96 transitions, 1129 flow [2025-03-17 14:34:16,390 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 14:34:16,390 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:16,390 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:16,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-17 14:34:16,390 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:16,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash -743827287, now seen corresponding path program 5 times [2025-03-17 14:34:16,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:16,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487776231] [2025-03-17 14:34:16,391 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:34:16,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:16,395 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 14:34:16,401 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:34:16,401 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:34:16,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:16,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:16,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487776231] [2025-03-17 14:34:16,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487776231] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:16,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:16,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:34:16,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404063701] [2025-03-17 14:34:16,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:16,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:34:16,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:16,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:34:16,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:34:16,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:16,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 96 transitions, 1129 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 14:34:16,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:16,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:16,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:16,744 INFO L124 PetriNetUnfolderBase]: 1210/2020 cut-off events. [2025-03-17 14:34:16,744 INFO L125 PetriNetUnfolderBase]: For 10720/10720 co-relation queries the response was YES. [2025-03-17 14:34:16,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8615 conditions, 2020 events. 1210/2020 cut-off events. For 10720/10720 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9968 event pairs, 591 based on Foata normal form. 24/2044 useless extension candidates. Maximal degree in co-relation 7828. Up to 1519 conditions per place. [2025-03-17 14:34:16,755 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 85 selfloop transitions, 38 changer transitions 0/124 dead transitions. [2025-03-17 14:34:16,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 124 transitions, 1514 flow [2025-03-17 14:34:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:34:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:34:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2025-03-17 14:34:16,757 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-03-17 14:34:16,757 INFO L175 Difference]: Start difference. First operand has 93 places, 96 transitions, 1129 flow. Second operand 6 states and 171 transitions. [2025-03-17 14:34:16,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 124 transitions, 1514 flow [2025-03-17 14:34:16,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 124 transitions, 1463 flow, removed 12 selfloop flow, removed 1 redundant places. [2025-03-17 14:34:16,776 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 1225 flow [2025-03-17 14:34:16,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1225, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2025-03-17 14:34:16,778 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 53 predicate places. [2025-03-17 14:34:16,778 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 1225 flow [2025-03-17 14:34:16,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 14:34:16,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:16,779 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:16,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-17 14:34:16,779 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:16,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:16,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1699837602, now seen corresponding path program 1 times [2025-03-17 14:34:16,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:16,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506724873] [2025-03-17 14:34:16,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:16,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:34:16,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:34:16,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:16,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:16,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:16,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506724873] [2025-03-17 14:34:16,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506724873] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:16,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:16,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 14:34:16,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334111753] [2025-03-17 14:34:16,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:16,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:34:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:16,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:34:16,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:34:16,992 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:16,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 1225 flow. Second operand has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 14:34:16,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:16,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:16,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:17,698 INFO L124 PetriNetUnfolderBase]: 2052/3477 cut-off events. [2025-03-17 14:34:17,699 INFO L125 PetriNetUnfolderBase]: For 16046/16046 co-relation queries the response was YES. [2025-03-17 14:34:17,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14506 conditions, 3477 events. 2052/3477 cut-off events. For 16046/16046 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 20140 event pairs, 397 based on Foata normal form. 60/3537 useless extension candidates. Maximal degree in co-relation 13268. Up to 1024 conditions per place. [2025-03-17 14:34:17,716 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 225 selfloop transitions, 72 changer transitions 0/298 dead transitions. [2025-03-17 14:34:17,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 298 transitions, 3524 flow [2025-03-17 14:34:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:34:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:34:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 342 transitions. [2025-03-17 14:34:17,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2025-03-17 14:34:17,718 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 1225 flow. Second operand 11 states and 342 transitions. [2025-03-17 14:34:17,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 298 transitions, 3524 flow [2025-03-17 14:34:17,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 298 transitions, 3358 flow, removed 23 selfloop flow, removed 2 redundant places. [2025-03-17 14:34:17,754 INFO L231 Difference]: Finished difference. Result has 116 places, 147 transitions, 2061 flow [2025-03-17 14:34:17,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2061, PETRI_PLACES=116, PETRI_TRANSITIONS=147} [2025-03-17 14:34:17,755 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 69 predicate places. [2025-03-17 14:34:17,755 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 147 transitions, 2061 flow [2025-03-17 14:34:17,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 14:34:17,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:17,755 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:17,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-17 14:34:17,756 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:17,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash 568510506, now seen corresponding path program 2 times [2025-03-17 14:34:17,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:17,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011784571] [2025-03-17 14:34:17,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:34:17,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:17,765 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:34:17,773 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 22 statements. [2025-03-17 14:34:17,774 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:34:17,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:34:17,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:17,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011784571] [2025-03-17 14:34:17,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011784571] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:17,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:34:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431330041] [2025-03-17 14:34:17,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:17,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:34:17,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:17,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:34:17,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:34:17,835 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:17,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 147 transitions, 2061 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 14:34:17,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:17,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:17,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:18,202 INFO L124 PetriNetUnfolderBase]: 2028/3473 cut-off events. [2025-03-17 14:34:18,202 INFO L125 PetriNetUnfolderBase]: For 24793/24793 co-relation queries the response was YES. [2025-03-17 14:34:18,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17248 conditions, 3473 events. 2028/3473 cut-off events. For 24793/24793 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19790 event pairs, 792 based on Foata normal form. 78/3551 useless extension candidates. Maximal degree in co-relation 16162. Up to 2092 conditions per place. [2025-03-17 14:34:18,219 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 165 selfloop transitions, 67 changer transitions 0/233 dead transitions. [2025-03-17 14:34:18,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 233 transitions, 3475 flow [2025-03-17 14:34:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:34:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:34:18,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2025-03-17 14:34:18,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5868055555555556 [2025-03-17 14:34:18,220 INFO L175 Difference]: Start difference. First operand has 116 places, 147 transitions, 2061 flow. Second operand 6 states and 169 transitions. [2025-03-17 14:34:18,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 233 transitions, 3475 flow [2025-03-17 14:34:18,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 233 transitions, 3364 flow, removed 28 selfloop flow, removed 1 redundant places. [2025-03-17 14:34:18,269 INFO L231 Difference]: Finished difference. Result has 123 places, 165 transitions, 2495 flow [2025-03-17 14:34:18,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2495, PETRI_PLACES=123, PETRI_TRANSITIONS=165} [2025-03-17 14:34:18,270 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 76 predicate places. [2025-03-17 14:34:18,270 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 165 transitions, 2495 flow [2025-03-17 14:34:18,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 14:34:18,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:18,270 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:18,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-17 14:34:18,270 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:18,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:18,271 INFO L85 PathProgramCache]: Analyzing trace with hash 382243150, now seen corresponding path program 1 times [2025-03-17 14:34:18,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:18,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250063781] [2025-03-17 14:34:18,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:18,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:18,275 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 14:34:18,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:34:18,280 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:18,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:18,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:18,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250063781] [2025-03-17 14:34:18,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250063781] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:18,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:18,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:34:18,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580383533] [2025-03-17 14:34:18,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:18,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:34:18,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:18,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:34:18,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:34:18,360 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-03-17 14:34:18,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 165 transitions, 2495 flow. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 14:34:18,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:18,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-03-17 14:34:18,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:19,013 INFO L124 PetriNetUnfolderBase]: 2179/3849 cut-off events. [2025-03-17 14:34:19,013 INFO L125 PetriNetUnfolderBase]: For 30959/30967 co-relation queries the response was YES. [2025-03-17 14:34:19,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19609 conditions, 3849 events. 2179/3849 cut-off events. For 30959/30967 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23570 event pairs, 435 based on Foata normal form. 20/3869 useless extension candidates. Maximal degree in co-relation 18383. Up to 1037 conditions per place. [2025-03-17 14:34:19,033 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 249 selfloop transitions, 99 changer transitions 0/350 dead transitions. [2025-03-17 14:34:19,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 350 transitions, 4648 flow [2025-03-17 14:34:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:34:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:34:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 395 transitions. [2025-03-17 14:34:19,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6330128205128205 [2025-03-17 14:34:19,034 INFO L175 Difference]: Start difference. First operand has 123 places, 165 transitions, 2495 flow. Second operand 13 states and 395 transitions. [2025-03-17 14:34:19,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 350 transitions, 4648 flow [2025-03-17 14:34:19,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 350 transitions, 4496 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-03-17 14:34:19,097 INFO L231 Difference]: Finished difference. Result has 139 places, 209 transitions, 3228 flow [2025-03-17 14:34:19,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3228, PETRI_PLACES=139, PETRI_TRANSITIONS=209} [2025-03-17 14:34:19,098 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 92 predicate places. [2025-03-17 14:34:19,098 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 209 transitions, 3228 flow [2025-03-17 14:34:19,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 14:34:19,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:19,098 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:19,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-17 14:34:19,098 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:19,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash -633349326, now seen corresponding path program 1 times [2025-03-17 14:34:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:19,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610043825] [2025-03-17 14:34:19,098 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:19,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:19,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 14:34:19,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:34:19,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:19,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:19,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:19,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610043825] [2025-03-17 14:34:19,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610043825] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:19,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705921505] [2025-03-17 14:34:19,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:34:19,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:19,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:19,266 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 14:34:19,268 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 14:34:19,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 14:34:19,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:34:19,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:34:19,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:19,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-17 14:34:19,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:19,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 14:34:19,464 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 14:34:19,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:19,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 80 [2025-03-17 14:34:19,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:34:19,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 159 [2025-03-17 14:34:21,847 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 14:34:21,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705921505] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:21,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:21,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2025-03-17 14:34:21,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029739005] [2025-03-17 14:34:21,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:21,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 14:34:21,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:21,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 14:34:21,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:34:22,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:22,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 209 transitions, 3228 flow. Second operand has 21 states, 21 states have (on average 21.142857142857142) internal successors, (444), 21 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 14:34:22,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:22,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:22,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:26,792 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 14:34:29,700 INFO L124 PetriNetUnfolderBase]: 4911/8389 cut-off events. [2025-03-17 14:34:29,700 INFO L125 PetriNetUnfolderBase]: For 67992/67992 co-relation queries the response was YES. [2025-03-17 14:34:29,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43436 conditions, 8389 events. 4911/8389 cut-off events. For 67992/67992 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 53827 event pairs, 263 based on Foata normal form. 51/8440 useless extension candidates. Maximal degree in co-relation 42532. Up to 2194 conditions per place. [2025-03-17 14:34:29,740 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 410 selfloop transitions, 187 changer transitions 267/865 dead transitions. [2025-03-17 14:34:29,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 865 transitions, 11298 flow [2025-03-17 14:34:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-17 14:34:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-03-17 14:34:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1312 transitions. [2025-03-17 14:34:29,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2025-03-17 14:34:29,742 INFO L175 Difference]: Start difference. First operand has 139 places, 209 transitions, 3228 flow. Second operand 48 states and 1312 transitions. [2025-03-17 14:34:29,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 865 transitions, 11298 flow [2025-03-17 14:34:29,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 865 transitions, 10923 flow, removed 113 selfloop flow, removed 3 redundant places. [2025-03-17 14:34:29,931 INFO L231 Difference]: Finished difference. Result has 207 places, 304 transitions, 4584 flow [2025-03-17 14:34:29,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4584, PETRI_PLACES=207, PETRI_TRANSITIONS=304} [2025-03-17 14:34:29,931 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 160 predicate places. [2025-03-17 14:34:29,931 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 304 transitions, 4584 flow [2025-03-17 14:34:29,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.142857142857142) internal successors, (444), 21 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 14:34:29,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:29,932 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:29,938 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 14:34:30,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-17 14:34:30,132 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:30,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:30,133 INFO L85 PathProgramCache]: Analyzing trace with hash 84632272, now seen corresponding path program 2 times [2025-03-17 14:34:30,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:30,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119840733] [2025-03-17 14:34:30,133 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:34:30,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:30,137 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-17 14:34:30,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 23 statements. [2025-03-17 14:34:30,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:34:30,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:30,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:30,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119840733] [2025-03-17 14:34:30,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119840733] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:34:30,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:34:30,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:34:30,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370188414] [2025-03-17 14:34:30,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:34:30,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:34:30,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:30,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:34:30,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:34:30,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:30,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 304 transitions, 4584 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 14:34:30,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:30,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:30,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:31,336 INFO L124 PetriNetUnfolderBase]: 3495/6025 cut-off events. [2025-03-17 14:34:31,337 INFO L125 PetriNetUnfolderBase]: For 58052/58052 co-relation queries the response was YES. [2025-03-17 14:34:31,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34864 conditions, 6025 events. 3495/6025 cut-off events. For 58052/58052 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 36365 event pairs, 1247 based on Foata normal form. 6/6031 useless extension candidates. Maximal degree in co-relation 34531. Up to 2918 conditions per place. [2025-03-17 14:34:31,385 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 322 selfloop transitions, 111 changer transitions 2/436 dead transitions. [2025-03-17 14:34:31,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 436 transitions, 6742 flow [2025-03-17 14:34:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:34:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:34:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 288 transitions. [2025-03-17 14:34:31,386 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 14:34:31,386 INFO L175 Difference]: Start difference. First operand has 207 places, 304 transitions, 4584 flow. Second operand 9 states and 288 transitions. [2025-03-17 14:34:31,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 436 transitions, 6742 flow [2025-03-17 14:34:31,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 436 transitions, 6140 flow, removed 252 selfloop flow, removed 14 redundant places. [2025-03-17 14:34:31,573 INFO L231 Difference]: Finished difference. Result has 195 places, 319 transitions, 4679 flow [2025-03-17 14:34:31,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4679, PETRI_PLACES=195, PETRI_TRANSITIONS=319} [2025-03-17 14:34:31,574 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 148 predicate places. [2025-03-17 14:34:31,574 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 319 transitions, 4679 flow [2025-03-17 14:34:31,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 14:34:31,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:31,574 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:31,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-17 14:34:31,574 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:31,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2024743044, now seen corresponding path program 3 times [2025-03-17 14:34:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:31,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106351162] [2025-03-17 14:34:31,575 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:34:31,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:31,579 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-17 14:34:31,585 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:34:31,585 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:34:31,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:31,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:31,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106351162] [2025-03-17 14:34:31,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106351162] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:31,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420616319] [2025-03-17 14:34:31,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:34:31,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:31,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:31,708 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 14:34:31,709 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 14:34:31,746 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-17 14:34:31,761 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:34:31,762 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:34:31,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:31,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:34:31,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:31,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:31,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420616319] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:31,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:31,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2025-03-17 14:34:31,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98730340] [2025-03-17 14:34:31,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:31,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 14:34:31,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:31,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 14:34:31,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:34:31,889 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:31,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 319 transitions, 4679 flow. Second operand has 16 states, 16 states have (on average 20.5) internal successors, (328), 16 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 14:34:31,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:31,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:31,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:33,252 INFO L124 PetriNetUnfolderBase]: 4077/7105 cut-off events. [2025-03-17 14:34:33,252 INFO L125 PetriNetUnfolderBase]: For 64112/64112 co-relation queries the response was YES. [2025-03-17 14:34:33,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40605 conditions, 7105 events. 4077/7105 cut-off events. For 64112/64112 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 45068 event pairs, 1530 based on Foata normal form. 32/7137 useless extension candidates. Maximal degree in co-relation 40347. Up to 4178 conditions per place. [2025-03-17 14:34:33,302 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 358 selfloop transitions, 238 changer transitions 7/604 dead transitions. [2025-03-17 14:34:33,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 604 transitions, 8920 flow [2025-03-17 14:34:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 14:34:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 14:34:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 625 transitions. [2025-03-17 14:34:33,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5425347222222222 [2025-03-17 14:34:33,303 INFO L175 Difference]: Start difference. First operand has 195 places, 319 transitions, 4679 flow. Second operand 24 states and 625 transitions. [2025-03-17 14:34:33,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 604 transitions, 8920 flow [2025-03-17 14:34:33,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 604 transitions, 8844 flow, removed 14 selfloop flow, removed 3 redundant places. [2025-03-17 14:34:33,548 INFO L231 Difference]: Finished difference. Result has 230 places, 467 transitions, 7686 flow [2025-03-17 14:34:33,548 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4552, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7686, PETRI_PLACES=230, PETRI_TRANSITIONS=467} [2025-03-17 14:34:33,548 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 183 predicate places. [2025-03-17 14:34:33,548 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 467 transitions, 7686 flow [2025-03-17 14:34:33,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.5) internal successors, (328), 16 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 14:34:33,549 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:33,549 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:33,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 14:34:33,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-17 14:34:33,749 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:33,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash 393696190, now seen corresponding path program 4 times [2025-03-17 14:34:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:33,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359211019] [2025-03-17 14:34:33,750 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:34:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:33,755 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-17 14:34:33,762 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:34:33,762 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:34:33,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:33,929 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 14:34:33,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:33,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359211019] [2025-03-17 14:34:33,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359211019] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:33,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233557115] [2025-03-17 14:34:33,929 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:34:33,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:33,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:33,931 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 14:34:33,933 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 14:34:33,971 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-17 14:34:33,986 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:34:33,987 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:34:33,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:33,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:34:33,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:34,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:34:34,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233557115] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:34,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:34,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-03-17 14:34:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336537594] [2025-03-17 14:34:34,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:34,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:34:34,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:34,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:34:34,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:34:34,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:34:34,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 467 transitions, 7686 flow. Second operand has 19 states, 19 states have (on average 20.894736842105264) internal successors, (397), 19 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:34,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:34,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:34:34,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:46,321 INFO L124 PetriNetUnfolderBase]: 5274/9324 cut-off events. [2025-03-17 14:34:46,321 INFO L125 PetriNetUnfolderBase]: For 115475/115475 co-relation queries the response was YES. [2025-03-17 14:34:46,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59116 conditions, 9324 events. 5274/9324 cut-off events. For 115475/115475 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 63622 event pairs, 396 based on Foata normal form. 60/9384 useless extension candidates. Maximal degree in co-relation 58332. Up to 1678 conditions per place. [2025-03-17 14:34:46,407 INFO L140 encePairwiseOnDemand]: 28/48 looper letters, 399 selfloop transitions, 452 changer transitions 454/1306 dead transitions. [2025-03-17 14:34:46,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1306 transitions, 19538 flow [2025-03-17 14:34:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2025-03-17 14:34:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2025-03-17 14:34:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 2235 transitions. [2025-03-17 14:34:46,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5477941176470589 [2025-03-17 14:34:46,411 INFO L175 Difference]: Start difference. First operand has 230 places, 467 transitions, 7686 flow. Second operand 85 states and 2235 transitions. [2025-03-17 14:34:46,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1306 transitions, 19538 flow [2025-03-17 14:34:47,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1306 transitions, 18817 flow, removed 221 selfloop flow, removed 9 redundant places. [2025-03-17 14:34:47,138 INFO L231 Difference]: Finished difference. Result has 342 places, 587 transitions, 9747 flow [2025-03-17 14:34:47,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=9747, PETRI_PLACES=342, PETRI_TRANSITIONS=587} [2025-03-17 14:34:47,139 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 295 predicate places. [2025-03-17 14:34:47,139 INFO L471 AbstractCegarLoop]: Abstraction has has 342 places, 587 transitions, 9747 flow [2025-03-17 14:34:47,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.894736842105264) internal successors, (397), 19 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:34:47,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:34:47,139 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:34:47,145 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 14:34:47,341 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,SelfDestructingSolverStorable27 [2025-03-17 14:34:47,341 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:34:47,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:34:47,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1499716117, now seen corresponding path program 5 times [2025-03-17 14:34:47,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:34:47,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497072156] [2025-03-17 14:34:47,342 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:34:47,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:34:47,345 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-17 14:34:47,351 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:34:47,351 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:34:47,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:47,459 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 14:34:47,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:34:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497072156] [2025-03-17 14:34:47,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497072156] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:34:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930137377] [2025-03-17 14:34:47,459 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:34:47,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:34:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:34:47,461 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 14:34:47,463 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 14:34:47,501 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-17 14:34:47,517 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:34:47,517 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:34:47,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:34:47,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 14:34:47,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:34:47,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 14:34:47,745 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 14:34:47,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:34:47,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 124 [2025-03-17 14:34:48,038 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2025-03-17 14:34:48,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 439 treesize of output 326 [2025-03-17 14:34:57,576 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 14:34:57,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930137377] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:34:57,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:34:57,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 23 [2025-03-17 14:34:57,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159960998] [2025-03-17 14:34:57,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:34:57,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:34:57,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:34:57,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:34:57,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2025-03-17 14:34:57,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-03-17 14:34:57,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 587 transitions, 9747 flow. Second operand has 24 states, 24 states have (on average 23.625) internal successors, (567), 24 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 14:34:57,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:34:57,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-03-17 14:34:57,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:34:59,582 INFO L124 PetriNetUnfolderBase]: 4040/7437 cut-off events. [2025-03-17 14:34:59,582 INFO L125 PetriNetUnfolderBase]: For 142141/142244 co-relation queries the response was YES. [2025-03-17 14:34:59,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55489 conditions, 7437 events. 4040/7437 cut-off events. For 142141/142244 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 50547 event pairs, 410 based on Foata normal form. 17/7423 useless extension candidates. Maximal degree in co-relation 55096. Up to 3260 conditions per place. [2025-03-17 14:34:59,663 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 370 selfloop transitions, 347 changer transitions 76/832 dead transitions. [2025-03-17 14:34:59,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 832 transitions, 15123 flow [2025-03-17 14:34:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:34:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:34:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 467 transitions. [2025-03-17 14:34:59,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486111111111111 [2025-03-17 14:34:59,664 INFO L175 Difference]: Start difference. First operand has 342 places, 587 transitions, 9747 flow. Second operand 15 states and 467 transitions. [2025-03-17 14:34:59,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 832 transitions, 15123 flow [2025-03-17 14:35:00,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 832 transitions, 12706 flow, removed 1033 selfloop flow, removed 34 redundant places. [2025-03-17 14:35:00,626 INFO L231 Difference]: Finished difference. Result has 296 places, 677 transitions, 10466 flow [2025-03-17 14:35:00,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8066, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10466, PETRI_PLACES=296, PETRI_TRANSITIONS=677} [2025-03-17 14:35:00,626 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 249 predicate places. [2025-03-17 14:35:00,626 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 677 transitions, 10466 flow [2025-03-17 14:35:00,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 23.625) internal successors, (567), 24 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 14:35:00,627 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:35:00,627 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:35:00,632 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 14:35:00,827 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,SelfDestructingSolverStorable28 [2025-03-17 14:35:00,827 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:35:00,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:35:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1935179873, now seen corresponding path program 2 times [2025-03-17 14:35:00,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:35:00,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333906062] [2025-03-17 14:35:00,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:35:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:35:00,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-17 14:35:00,837 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 25 statements. [2025-03-17 14:35:00,837 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:35:00,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:35:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:35:00,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:35:00,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333906062] [2025-03-17 14:35:00,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333906062] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:35:00,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:35:00,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 14:35:00,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455696651] [2025-03-17 14:35:00,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:35:00,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:35:00,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:35:00,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:35:00,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:35:00,979 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-03-17 14:35:00,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 677 transitions, 10466 flow. Second operand has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 14:35:00,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:35:00,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-03-17 14:35:00,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:35:02,553 INFO L124 PetriNetUnfolderBase]: 4209/7471 cut-off events. [2025-03-17 14:35:02,554 INFO L125 PetriNetUnfolderBase]: For 110967/111016 co-relation queries the response was YES. [2025-03-17 14:35:02,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51514 conditions, 7471 events. 4209/7471 cut-off events. For 110967/111016 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 48717 event pairs, 1948 based on Foata normal form. 13/7476 useless extension candidates. Maximal degree in co-relation 51408. Up to 6315 conditions per place. [2025-03-17 14:35:02,620 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 641 selfloop transitions, 65 changer transitions 0/712 dead transitions. [2025-03-17 14:35:02,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 712 transitions, 12147 flow [2025-03-17 14:35:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:35:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:35:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2025-03-17 14:35:02,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5963541666666666 [2025-03-17 14:35:02,621 INFO L175 Difference]: Start difference. First operand has 296 places, 677 transitions, 10466 flow. Second operand 8 states and 229 transitions. [2025-03-17 14:35:02,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 712 transitions, 12147 flow [2025-03-17 14:35:03,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 712 transitions, 11831 flow, removed 132 selfloop flow, removed 8 redundant places. [2025-03-17 14:35:03,233 INFO L231 Difference]: Finished difference. Result has 268 places, 679 transitions, 10321 flow [2025-03-17 14:35:03,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10156, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10321, PETRI_PLACES=268, PETRI_TRANSITIONS=679} [2025-03-17 14:35:03,234 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 221 predicate places. [2025-03-17 14:35:03,234 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 679 transitions, 10321 flow [2025-03-17 14:35:03,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 14:35:03,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:35:03,235 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:35:03,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-17 14:35:03,235 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:35:03,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:35:03,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1135370195, now seen corresponding path program 3 times [2025-03-17 14:35:03,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:35:03,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783634341] [2025-03-17 14:35:03,235 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:35:03,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:35:03,239 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-03-17 14:35:03,248 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 25 statements. [2025-03-17 14:35:03,248 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:35:03,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:35:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:35:03,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:35:03,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783634341] [2025-03-17 14:35:03,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783634341] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:35:03,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47982857] [2025-03-17 14:35:03,501 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:35:03,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:35:03,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:35:03,503 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 14:35:03,505 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 14:35:03,542 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-03-17 14:35:03,614 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 25 statements. [2025-03-17 14:35:03,615 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:35:03,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:35:03,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 14:35:03,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:35:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:35:03,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:35:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:35:03,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47982857] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:35:03,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:35:03,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2025-03-17 14:35:03,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913270371] [2025-03-17 14:35:03,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:35:03,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 14:35:03,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:35:03,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 14:35:03,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:35:03,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:35:03,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 679 transitions, 10321 flow. Second operand has 21 states, 21 states have (on average 19.714285714285715) internal successors, (414), 21 states have internal predecessors, (414), 0 states have call successors, (0), 0 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 14:35:03,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:35:03,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:35:03,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:35:21,557 WARN L286 SmtUtils]: Spent 16.04s on a formula simplification. DAG size of input: 35 DAG size of output: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-17 14:35:31,028 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 33 DAG size of output: 27 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-17 14:35:33,042 INFO L124 PetriNetUnfolderBase]: 5256/9328 cut-off events. [2025-03-17 14:35:33,042 INFO L125 PetriNetUnfolderBase]: For 133076/133076 co-relation queries the response was YES. [2025-03-17 14:35:33,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62368 conditions, 9328 events. 5256/9328 cut-off events. For 133076/133076 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 64424 event pairs, 1013 based on Foata normal form. 102/9430 useless extension candidates. Maximal degree in co-relation 62264. Up to 3072 conditions per place. [2025-03-17 14:35:33,270 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 726 selfloop transitions, 523 changer transitions 0/1250 dead transitions. [2025-03-17 14:35:33,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1250 transitions, 19496 flow [2025-03-17 14:35:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-03-17 14:35:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2025-03-17 14:35:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1249 transitions. [2025-03-17 14:35:33,272 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5536347517730497 [2025-03-17 14:35:33,272 INFO L175 Difference]: Start difference. First operand has 268 places, 679 transitions, 10321 flow. Second operand 47 states and 1249 transitions. [2025-03-17 14:35:33,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1250 transitions, 19496 flow [2025-03-17 14:35:34,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1250 transitions, 19323 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 14:35:34,054 INFO L231 Difference]: Finished difference. Result has 343 places, 926 transitions, 15835 flow [2025-03-17 14:35:34,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10188, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15835, PETRI_PLACES=343, PETRI_TRANSITIONS=926} [2025-03-17 14:35:34,055 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 296 predicate places. [2025-03-17 14:35:34,055 INFO L471 AbstractCegarLoop]: Abstraction has has 343 places, 926 transitions, 15835 flow [2025-03-17 14:35:34,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.714285714285715) internal successors, (414), 21 states have internal predecessors, (414), 0 states have call successors, (0), 0 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 14:35:34,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:35:34,056 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:35:34,062 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 14:35:34,256 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,SelfDestructingSolverStorable30 [2025-03-17 14:35:34,256 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-17 14:35:34,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:35:34,257 INFO L85 PathProgramCache]: Analyzing trace with hash -72981977, now seen corresponding path program 6 times [2025-03-17 14:35:34,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:35:34,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429266378] [2025-03-17 14:35:34,257 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:35:34,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:35:34,261 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 3 equivalence classes. [2025-03-17 14:35:34,266 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 21 of 25 statements. [2025-03-17 14:35:34,266 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 14:35:34,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:35:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:35:34,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:35:34,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429266378] [2025-03-17 14:35:34,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429266378] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:35:34,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:35:34,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:35:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549035281] [2025-03-17 14:35:34,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:35:34,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:35:34,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:35:34,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:35:34,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:35:34,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 14:35:34,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 926 transitions, 15835 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 14:35:34,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:35:34,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 14:35:34,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand