./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult3.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/popl20-more-buffer-mult3.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 7888761977ccc49b1a75199021e374591654c6a4364e63bfc6c86e1c7bb7d64b --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:29:02,992 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:29:03,050 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:29:03,057 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:29:03,057 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:29:03,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:29:03,073 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:29:03,073 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:29:03,074 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:29:03,074 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:29:03,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:29:03,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:29:03,075 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:29:03,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:29:03,075 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:29:03,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:29:03,076 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:29:03,077 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:29:03,077 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:29:03,077 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:29:03,077 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:29:03,077 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:29:03,077 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:29:03,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:29:03,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:29:03,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:29:03,078 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:29:03,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:29:03,078 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:29:03,078 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:29:03,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:29:03,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:29:03,078 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 -> 7888761977ccc49b1a75199021e374591654c6a4364e63bfc6c86e1c7bb7d64b [2025-03-17 14:29:03,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:29:03,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:29:03,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:29:03,300 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:29:03,300 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:29:03,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult3.wvr.c [2025-03-17 14:29:04,429 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c5d0130b/a5753beddf6c43e2be742729b12bee59/FLAG4f77e4ea6 [2025-03-17 14:29:04,677 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:29:04,678 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult3.wvr.c [2025-03-17 14:29:04,687 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c5d0130b/a5753beddf6c43e2be742729b12bee59/FLAG4f77e4ea6 [2025-03-17 14:29:04,704 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c5d0130b/a5753beddf6c43e2be742729b12bee59 [2025-03-17 14:29:04,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:29:04,707 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:29:04,708 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:29:04,708 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:29:04,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:29:04,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba7706c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04, skipping insertion in model container [2025-03-17 14:29:04,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,729 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:29:04,851 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 14:29:04,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:29:04,861 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:29:04,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:29:04,892 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:29:04,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04 WrapperNode [2025-03-17 14:29:04,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:29:04,893 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:29:04,893 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:29:04,893 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:29:04,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,919 INFO L138 Inliner]: procedures = 26, calls = 61, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 280 [2025-03-17 14:29:04,919 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:29:04,920 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:29:04,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:29:04,920 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:29:04,925 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,928 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,940 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-17 14:29:04,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,941 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,946 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,947 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,947 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,948 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:29:04,951 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:29:04,951 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:29:04,951 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:29:04,951 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (1/1) ... [2025-03-17 14:29:04,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:29:04,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:04,976 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 14:29:04,980 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 14:29:04,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:29:04,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:29:04,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:29:04,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:29:04,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:29:04,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:29:04,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:29:04,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:29:04,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:29:04,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:29:04,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:29:04,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-17 14:29:04,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-17 14:29:04,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:29:04,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:29:04,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:29:04,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:29:04,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:29:04,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:29:04,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:29:04,996 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 14:29:05,079 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:29:05,081 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:29:05,477 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:29:05,477 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:29:05,775 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:29:05,777 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:29:05,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:29:05 BoogieIcfgContainer [2025-03-17 14:29:05,777 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:29:05,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:29:05,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:29:05,785 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:29:05,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:29:04" (1/3) ... [2025-03-17 14:29:05,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce429e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:29:05, skipping insertion in model container [2025-03-17 14:29:05,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:29:04" (2/3) ... [2025-03-17 14:29:05,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce429e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:29:05, skipping insertion in model container [2025-03-17 14:29:05,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:29:05" (3/3) ... [2025-03-17 14:29:05,788 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult3.wvr.c [2025-03-17 14:29:05,805 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:29:05,807 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-mult3.wvr.c that has 5 procedures, 61 locations, 1 initial locations, 6 loop locations, and 14 error locations. [2025-03-17 14:29:05,807 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:29:05,871 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 14:29:05,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 66 transitions, 160 flow [2025-03-17 14:29:05,927 INFO L124 PetriNetUnfolderBase]: 6/62 cut-off events. [2025-03-17 14:29:05,929 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:29:05,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 62 events. 6/62 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 137 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2025-03-17 14:29:05,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 66 transitions, 160 flow [2025-03-17 14:29:05,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 61 transitions, 146 flow [2025-03-17 14:29:05,940 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:29:05,953 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;@6120c631, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:29:05,953 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2025-03-17 14:29:05,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:29:05,959 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:29:05,959 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:29:05,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:05,959 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:29:05,960 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:05,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash 767220, now seen corresponding path program 1 times [2025-03-17 14:29:05,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:05,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256778434] [2025-03-17 14:29:05,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:05,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:06,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:29:06,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:29:06,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:06,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:06,166 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 14:29:06,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:06,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256778434] [2025-03-17 14:29:06,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256778434] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:06,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:06,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:29:06,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520113435] [2025-03-17 14:29:06,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:06,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:29:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:06,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:29:06,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:29:06,203 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2025-03-17 14:29:06,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:29:06,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:06,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2025-03-17 14:29:06,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:07,770 INFO L124 PetriNetUnfolderBase]: 15159/20183 cut-off events. [2025-03-17 14:29:07,772 INFO L125 PetriNetUnfolderBase]: For 609/609 co-relation queries the response was YES. [2025-03-17 14:29:07,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40874 conditions, 20183 events. 15159/20183 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 116596 event pairs, 12544 based on Foata normal form. 1/14573 useless extension candidates. Maximal degree in co-relation 38292. Up to 19683 conditions per place. [2025-03-17 14:29:07,912 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 44 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2025-03-17 14:29:07,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 230 flow [2025-03-17 14:29:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:29:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:29:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2025-03-17 14:29:07,922 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2025-03-17 14:29:07,923 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 146 flow. Second operand 3 states and 97 transitions. [2025-03-17 14:29:07,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 230 flow [2025-03-17 14:29:08,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 214 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 14:29:08,016 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 126 flow [2025-03-17 14:29:08,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2025-03-17 14:29:08,021 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2025-03-17 14:29:08,021 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 126 flow [2025-03-17 14:29:08,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:29:08,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:08,021 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:29:08,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:29:08,021 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:08,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash 767221, now seen corresponding path program 1 times [2025-03-17 14:29:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:08,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935448622] [2025-03-17 14:29:08,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:08,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:08,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:29:08,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:29:08,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:08,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:08,302 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 14:29:08,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935448622] [2025-03-17 14:29:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935448622] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:08,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:08,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:29:08,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715989591] [2025-03-17 14:29:08,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:08,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:29:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:08,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:29:08,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:29:08,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2025-03-17 14:29:08,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:08,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:08,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2025-03-17 14:29:08,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:09,482 INFO L124 PetriNetUnfolderBase]: 15160/20186 cut-off events. [2025-03-17 14:29:09,482 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-03-17 14:29:09,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40235 conditions, 20186 events. 15160/20186 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 116593 event pairs, 12544 based on Foata normal form. 0/14573 useless extension candidates. Maximal degree in co-relation 40206. Up to 19692 conditions per place. [2025-03-17 14:29:09,568 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 47 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2025-03-17 14:29:09,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 234 flow [2025-03-17 14:29:09,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:29:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:29:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-03-17 14:29:09,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2025-03-17 14:29:09,571 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 4 states and 116 transitions. [2025-03-17 14:29:09,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 234 flow [2025-03-17 14:29:09,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:09,573 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 149 flow [2025-03-17 14:29:09,573 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2025-03-17 14:29:09,574 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2025-03-17 14:29:09,574 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 149 flow [2025-03-17 14:29:09,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:09,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:09,574 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 14:29:09,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:29:09,576 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:09,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash 23785919, now seen corresponding path program 1 times [2025-03-17 14:29:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:09,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552668632] [2025-03-17 14:29:09,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:09,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:09,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 14:29:09,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 14:29:09,604 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:09,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:09,770 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 14:29:09,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:09,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552668632] [2025-03-17 14:29:09,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552668632] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:09,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:09,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:29:09,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697642109] [2025-03-17 14:29:09,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:09,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:29:09,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:09,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:29:09,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:29:09,786 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2025-03-17 14:29:09,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:29:09,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:09,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2025-03-17 14:29:09,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:10,893 INFO L124 PetriNetUnfolderBase]: 15161/20189 cut-off events. [2025-03-17 14:29:10,893 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-03-17 14:29:10,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40252 conditions, 20189 events. 15161/20189 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 116587 event pairs, 12544 based on Foata normal form. 0/14575 useless extension candidates. Maximal degree in co-relation 40227. Up to 19691 conditions per place. [2025-03-17 14:29:10,994 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 47 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2025-03-17 14:29:10,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 263 flow [2025-03-17 14:29:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:29:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:29:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2025-03-17 14:29:10,996 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-03-17 14:29:10,997 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 149 flow. Second operand 5 states and 135 transitions. [2025-03-17 14:29:10,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 263 flow [2025-03-17 14:29:10,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:10,998 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 183 flow [2025-03-17 14:29:10,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2025-03-17 14:29:10,999 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2025-03-17 14:29:10,999 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 183 flow [2025-03-17 14:29:10,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:29:10,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:10,999 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:29:10,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:29:10,999 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:10,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:10,999 INFO L85 PathProgramCache]: Analyzing trace with hash 737323749, now seen corresponding path program 1 times [2025-03-17 14:29:11,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:11,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236565390] [2025-03-17 14:29:11,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:11,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:11,009 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:29:11,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:29:11,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:11,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:11,234 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 14:29:11,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:11,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236565390] [2025-03-17 14:29:11,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236565390] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:11,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029118289] [2025-03-17 14:29:11,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:11,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:11,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:11,238 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 14:29:11,240 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 14:29:11,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:29:11,299 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:29:11,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:11,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:11,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:29:11,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:11,347 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 14:29:11,501 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 14:29:11,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:29:11,602 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 14:29:11,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029118289] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:29:11,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:29:11,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:29:11,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472726835] [2025-03-17 14:29:11,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:29:11,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:29:11,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:11,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:29:11,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:29:11,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2025-03-17 14:29:11,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:11,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:11,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2025-03-17 14:29:11,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:12,852 INFO L124 PetriNetUnfolderBase]: 15161/20188 cut-off events. [2025-03-17 14:29:12,852 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2025-03-17 14:29:12,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40265 conditions, 20188 events. 15161/20188 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 116683 event pairs, 12544 based on Foata normal form. 0/14577 useless extension candidates. Maximal degree in co-relation 40237. Up to 19691 conditions per place. [2025-03-17 14:29:12,941 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 46 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2025-03-17 14:29:12,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 285 flow [2025-03-17 14:29:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:29:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:29:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2025-03-17 14:29:12,943 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2025-03-17 14:29:12,943 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 183 flow. Second operand 6 states and 147 transitions. [2025-03-17 14:29:12,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 285 flow [2025-03-17 14:29:12,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:12,944 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 192 flow [2025-03-17 14:29:12,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2025-03-17 14:29:12,945 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2025-03-17 14:29:12,945 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 192 flow [2025-03-17 14:29:12,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:12,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:12,945 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-17 14:29:12,952 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 14:29:13,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:13,146 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:13,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:13,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1383455912, now seen corresponding path program 1 times [2025-03-17 14:29:13,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:13,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957467072] [2025-03-17 14:29:13,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:13,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:13,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:29:13,158 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:29:13,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:13,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:13,330 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 14:29:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:13,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957467072] [2025-03-17 14:29:13,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957467072] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:13,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820586524] [2025-03-17 14:29:13,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:13,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:13,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:13,333 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 14:29:13,335 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 14:29:13,377 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:29:13,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:29:13,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:13,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:13,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:29:13,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:13,404 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 14:29:13,515 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 14:29:13,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:29:13,614 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 14:29:13,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820586524] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:29:13,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:29:13,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:29:13,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260005951] [2025-03-17 14:29:13,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:29:13,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:29:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:13,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:29:13,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:29:13,681 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2025-03-17 14:29:13,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 192 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 14:29:13,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:13,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2025-03-17 14:29:13,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:14,832 INFO L124 PetriNetUnfolderBase]: 15163/20193 cut-off events. [2025-03-17 14:29:14,833 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2025-03-17 14:29:14,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40291 conditions, 20193 events. 15163/20193 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 116587 event pairs, 12544 based on Foata normal form. 0/14582 useless extension candidates. Maximal degree in co-relation 40245. Up to 19684 conditions per place. [2025-03-17 14:29:14,894 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 40 selfloop transitions, 18 changer transitions 0/67 dead transitions. [2025-03-17 14:29:14,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 337 flow [2025-03-17 14:29:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:29:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:29:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2025-03-17 14:29:14,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2025-03-17 14:29:14,895 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 192 flow. Second operand 9 states and 204 transitions. [2025-03-17 14:29:14,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 337 flow [2025-03-17 14:29:14,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 290 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-17 14:29:14,897 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 210 flow [2025-03-17 14:29:14,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=210, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2025-03-17 14:29:14,897 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2025-03-17 14:29:14,897 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 210 flow [2025-03-17 14:29:14,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 14:29:14,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:14,899 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:14,905 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 14:29:15,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:15,100 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:15,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1828045126, now seen corresponding path program 1 times [2025-03-17 14:29:15,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:15,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528047602] [2025-03-17 14:29:15,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:15,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:15,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:29:15,110 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:29:15,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:15,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:15,166 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 14:29:15,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:15,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528047602] [2025-03-17 14:29:15,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528047602] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:15,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:15,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:29:15,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698821941] [2025-03-17 14:29:15,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:15,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:29:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:15,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:29:15,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:29:15,172 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2025-03-17 14:29:15,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 14:29:15,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:15,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2025-03-17 14:29:15,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:16,412 INFO L124 PetriNetUnfolderBase]: 18048/24276 cut-off events. [2025-03-17 14:29:16,413 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2025-03-17 14:29:16,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48447 conditions, 24276 events. 18048/24276 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 1252. Compared 145342 event pairs, 15126 based on Foata normal form. 633/18658 useless extension candidates. Maximal degree in co-relation 40230. Up to 19698 conditions per place. [2025-03-17 14:29:16,520 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 92 selfloop transitions, 5 changer transitions 0/106 dead transitions. [2025-03-17 14:29:16,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 106 transitions, 528 flow [2025-03-17 14:29:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:29:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:29:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2025-03-17 14:29:16,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5484848484848485 [2025-03-17 14:29:16,521 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 210 flow. Second operand 5 states and 181 transitions. [2025-03-17 14:29:16,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 106 transitions, 528 flow [2025-03-17 14:29:16,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 475 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-03-17 14:29:16,523 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 216 flow [2025-03-17 14:29:16,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2025-03-17 14:29:16,524 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2025-03-17 14:29:16,524 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 216 flow [2025-03-17 14:29:16,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 14:29:16,524 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:16,524 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:16,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:29:16,524 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:16,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1816166710, now seen corresponding path program 1 times [2025-03-17 14:29:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828296663] [2025-03-17 14:29:16,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:16,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:29:16,537 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:29:16,537 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:16,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:29:16,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:16,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828296663] [2025-03-17 14:29:16,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828296663] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:16,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:16,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:29:16,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856478288] [2025-03-17 14:29:16,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:16,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:29:16,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:16,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:29:16,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:29:16,663 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2025-03-17 14:29:16,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:29:16,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:16,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2025-03-17 14:29:16,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:17,744 INFO L124 PetriNetUnfolderBase]: 13848/18644 cut-off events. [2025-03-17 14:29:17,744 INFO L125 PetriNetUnfolderBase]: For 1230/1230 co-relation queries the response was YES. [2025-03-17 14:29:17,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39550 conditions, 18644 events. 13848/18644 cut-off events. For 1230/1230 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 107462 event pairs, 11474 based on Foata normal form. 0/14699 useless extension candidates. Maximal degree in co-relation 31373. Up to 18212 conditions per place. [2025-03-17 14:29:17,806 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 50 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2025-03-17 14:29:17,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 324 flow [2025-03-17 14:29:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:29:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:29:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2025-03-17 14:29:17,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2025-03-17 14:29:17,808 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 216 flow. Second operand 5 states and 126 transitions. [2025-03-17 14:29:17,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 324 flow [2025-03-17 14:29:17,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:17,810 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 219 flow [2025-03-17 14:29:17,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2025-03-17 14:29:17,811 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2025-03-17 14:29:17,811 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 219 flow [2025-03-17 14:29:17,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:29:17,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:17,811 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:17,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:29:17,812 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:17,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1736747303, now seen corresponding path program 1 times [2025-03-17 14:29:17,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:17,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153447029] [2025-03-17 14:29:17,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:17,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:17,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:29:17,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:29:17,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:17,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:17,853 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 14:29:17,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:17,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153447029] [2025-03-17 14:29:17,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153447029] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:17,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:17,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:29:17,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760554235] [2025-03-17 14:29:17,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:17,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:29:17,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:17,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:29:17,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:29:17,864 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2025-03-17 14:29:17,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:29:17,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:17,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2025-03-17 14:29:17,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:18,369 INFO L124 PetriNetUnfolderBase]: 10167/13757 cut-off events. [2025-03-17 14:29:18,369 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2025-03-17 14:29:18,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29202 conditions, 13757 events. 10167/13757 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 76254 event pairs, 8266 based on Foata normal form. 0/11566 useless extension candidates. Maximal degree in co-relation 23092. Up to 13393 conditions per place. [2025-03-17 14:29:18,422 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 51 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2025-03-17 14:29:18,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 327 flow [2025-03-17 14:29:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:29:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:29:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2025-03-17 14:29:18,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-03-17 14:29:18,423 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 219 flow. Second operand 4 states and 108 transitions. [2025-03-17 14:29:18,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 327 flow [2025-03-17 14:29:18,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 315 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:29:18,426 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 213 flow [2025-03-17 14:29:18,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2025-03-17 14:29:18,426 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2025-03-17 14:29:18,426 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 213 flow [2025-03-17 14:29:18,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:29:18,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:18,427 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:18,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:29:18,427 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:18,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1736747302, now seen corresponding path program 1 times [2025-03-17 14:29:18,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:18,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620236030] [2025-03-17 14:29:18,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:18,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:18,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:29:18,435 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:29:18,435 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:18,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:18,475 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 14:29:18,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:18,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620236030] [2025-03-17 14:29:18,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620236030] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:18,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:18,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:29:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444251736] [2025-03-17 14:29:18,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:18,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:29:18,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:18,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:29:18,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:29:18,479 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2025-03-17 14:29:18,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 14:29:18,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:18,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2025-03-17 14:29:18,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:19,227 INFO L124 PetriNetUnfolderBase]: 12936/17848 cut-off events. [2025-03-17 14:29:19,228 INFO L125 PetriNetUnfolderBase]: For 1190/1190 co-relation queries the response was YES. [2025-03-17 14:29:19,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37904 conditions, 17848 events. 12936/17848 cut-off events. For 1190/1190 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 105674 event pairs, 10753 based on Foata normal form. 500/15891 useless extension candidates. Maximal degree in co-relation 23114. Up to 13409 conditions per place. [2025-03-17 14:29:19,307 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 77 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2025-03-17 14:29:19,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 453 flow [2025-03-17 14:29:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:29:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:29:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2025-03-17 14:29:19,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2025-03-17 14:29:19,308 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 213 flow. Second operand 4 states and 149 transitions. [2025-03-17 14:29:19,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 453 flow [2025-03-17 14:29:19,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 447 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:19,311 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 231 flow [2025-03-17 14:29:19,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2025-03-17 14:29:19,311 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2025-03-17 14:29:19,312 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 231 flow [2025-03-17 14:29:19,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 14:29:19,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:19,312 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:19,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:29:19,312 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:19,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1816166709, now seen corresponding path program 1 times [2025-03-17 14:29:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:19,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193086714] [2025-03-17 14:29:19,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:19,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:19,317 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:29:19,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:29:19,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:19,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:29:19,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193086714] [2025-03-17 14:29:19,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193086714] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686816241] [2025-03-17 14:29:19,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:19,475 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 14:29:19,492 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 14:29:19,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:29:19,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:29:19,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:19,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:19,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:29:19,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:19,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:29:19,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:29:19,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-17 14:29:19,611 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:29:19,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:29:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:29:19,640 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:29:19,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686816241] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:19,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:29:19,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2025-03-17 14:29:19,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078756968] [2025-03-17 14:29:19,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:19,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:29:19,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:19,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:29:19,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:29:19,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2025-03-17 14:29:19,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 14:29:19,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:19,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2025-03-17 14:29:19,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:20,160 INFO L124 PetriNetUnfolderBase]: 9642/13381 cut-off events. [2025-03-17 14:29:20,161 INFO L125 PetriNetUnfolderBase]: For 1789/1789 co-relation queries the response was YES. [2025-03-17 14:29:20,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29299 conditions, 13381 events. 9642/13381 cut-off events. For 1789/1789 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 76614 event pairs, 7905 based on Foata normal form. 0/12310 useless extension candidates. Maximal degree in co-relation 16340. Up to 12970 conditions per place. [2025-03-17 14:29:20,216 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 50 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2025-03-17 14:29:20,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 331 flow [2025-03-17 14:29:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:29:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:29:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-03-17 14:29:20,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2025-03-17 14:29:20,217 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 231 flow. Second operand 4 states and 106 transitions. [2025-03-17 14:29:20,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 331 flow [2025-03-17 14:29:20,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:20,220 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 226 flow [2025-03-17 14:29:20,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2025-03-17 14:29:20,221 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2025-03-17 14:29:20,221 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 226 flow [2025-03-17 14:29:20,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 14:29:20,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:20,221 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:20,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 14:29:20,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:20,423 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:20,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 297447171, now seen corresponding path program 1 times [2025-03-17 14:29:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437665250] [2025-03-17 14:29:20,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:20,429 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:29:20,432 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:29:20,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:20,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:20,552 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 14:29:20,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437665250] [2025-03-17 14:29:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437665250] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545701428] [2025-03-17 14:29:20,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:20,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:20,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:20,556 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 14:29:20,557 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 14:29:20,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:29:20,617 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:29:20,617 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:20,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:20,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:29:20,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:20,676 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 14:29:20,676 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:29:20,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545701428] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:20,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:29:20,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-03-17 14:29:20,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357143043] [2025-03-17 14:29:20,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:20,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:29:20,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:20,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:29:20,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:29:20,692 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2025-03-17 14:29:20,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:20,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:20,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2025-03-17 14:29:20,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:21,116 INFO L124 PetriNetUnfolderBase]: 7325/10281 cut-off events. [2025-03-17 14:29:21,116 INFO L125 PetriNetUnfolderBase]: For 1452/1452 co-relation queries the response was YES. [2025-03-17 14:29:21,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21975 conditions, 10281 events. 7325/10281 cut-off events. For 1452/1452 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 57496 event pairs, 5929 based on Foata normal form. 0/10047 useless extension candidates. Maximal degree in co-relation 15705. Up to 9905 conditions per place. [2025-03-17 14:29:21,157 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 45 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2025-03-17 14:29:21,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 322 flow [2025-03-17 14:29:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:29:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:29:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-03-17 14:29:21,159 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2025-03-17 14:29:21,159 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 226 flow. Second operand 4 states and 112 transitions. [2025-03-17 14:29:21,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 322 flow [2025-03-17 14:29:21,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 317 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:21,162 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 227 flow [2025-03-17 14:29:21,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2025-03-17 14:29:21,164 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2025-03-17 14:29:21,164 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 227 flow [2025-03-17 14:29:21,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:21,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:21,165 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:21,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:29:21,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:21,365 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:21,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash -933051388, now seen corresponding path program 1 times [2025-03-17 14:29:21,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:21,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814177830] [2025-03-17 14:29:21,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:21,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:21,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 14:29:21,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:29:21,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:21,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:21,404 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 14:29:21,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:21,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814177830] [2025-03-17 14:29:21,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814177830] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:21,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:21,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:29:21,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577324971] [2025-03-17 14:29:21,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:21,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:29:21,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:21,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:29:21,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:29:21,406 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2025-03-17 14:29:21,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 227 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 14:29:21,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:21,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2025-03-17 14:29:21,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:22,064 INFO L124 PetriNetUnfolderBase]: 10490/14942 cut-off events. [2025-03-17 14:29:22,065 INFO L125 PetriNetUnfolderBase]: For 2440/2440 co-relation queries the response was YES. [2025-03-17 14:29:22,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31853 conditions, 14942 events. 10490/14942 cut-off events. For 2440/2440 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 88378 event pairs, 4096 based on Foata normal form. 4/14721 useless extension candidates. Maximal degree in co-relation 23679. Up to 7677 conditions per place. [2025-03-17 14:29:22,115 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 70 selfloop transitions, 3 changer transitions 2/84 dead transitions. [2025-03-17 14:29:22,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 436 flow [2025-03-17 14:29:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:29:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:29:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2025-03-17 14:29:22,116 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2025-03-17 14:29:22,116 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 227 flow. Second operand 3 states and 116 transitions. [2025-03-17 14:29:22,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 436 flow [2025-03-17 14:29:22,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:22,118 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 226 flow [2025-03-17 14:29:22,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2025-03-17 14:29:22,119 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2025-03-17 14:29:22,119 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 226 flow [2025-03-17 14:29:22,119 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 14:29:22,119 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:22,119 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:22,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 14:29:22,119 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:22,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:22,119 INFO L85 PathProgramCache]: Analyzing trace with hash -199480251, now seen corresponding path program 1 times [2025-03-17 14:29:22,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:22,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107044968] [2025-03-17 14:29:22,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:22,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:22,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 14:29:22,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:29:22,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:22,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:29:22,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:22,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107044968] [2025-03-17 14:29:22,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107044968] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:22,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:22,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:29:22,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790719300] [2025-03-17 14:29:22,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:22,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:29:22,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:22,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:29:22,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:29:22,187 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2025-03-17 14:29:22,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:29:22,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:22,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2025-03-17 14:29:22,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:22,995 INFO L124 PetriNetUnfolderBase]: 12266/17528 cut-off events. [2025-03-17 14:29:22,995 INFO L125 PetriNetUnfolderBase]: For 6832/6832 co-relation queries the response was YES. [2025-03-17 14:29:23,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39484 conditions, 17528 events. 12266/17528 cut-off events. For 6832/6832 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 107155 event pairs, 5669 based on Foata normal form. 396/17760 useless extension candidates. Maximal degree in co-relation 32762. Up to 8793 conditions per place. [2025-03-17 14:29:23,091 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 78 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2025-03-17 14:29:23,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 462 flow [2025-03-17 14:29:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:29:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:29:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2025-03-17 14:29:23,092 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.601010101010101 [2025-03-17 14:29:23,092 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 226 flow. Second operand 3 states and 119 transitions. [2025-03-17 14:29:23,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 462 flow [2025-03-17 14:29:23,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:23,095 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 237 flow [2025-03-17 14:29:23,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2025-03-17 14:29:23,096 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2025-03-17 14:29:23,096 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 237 flow [2025-03-17 14:29:23,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:29:23,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:23,096 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:23,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 14:29:23,096 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:23,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash -496762926, now seen corresponding path program 1 times [2025-03-17 14:29:23,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:23,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200982389] [2025-03-17 14:29:23,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:23,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:23,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 14:29:23,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:29:23,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:23,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:23,160 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 14:29:23,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:23,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200982389] [2025-03-17 14:29:23,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200982389] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:23,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:23,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:29:23,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201259347] [2025-03-17 14:29:23,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:23,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:29:23,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:23,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:29:23,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:29:23,161 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2025-03-17 14:29:23,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:29:23,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:23,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2025-03-17 14:29:23,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:24,154 INFO L124 PetriNetUnfolderBase]: 15142/21749 cut-off events. [2025-03-17 14:29:24,154 INFO L125 PetriNetUnfolderBase]: For 10816/10828 co-relation queries the response was YES. [2025-03-17 14:29:24,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50051 conditions, 21749 events. 15142/21749 cut-off events. For 10816/10828 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 135597 event pairs, 7035 based on Foata normal form. 320/21982 useless extension candidates. Maximal degree in co-relation 42029. Up to 10674 conditions per place. [2025-03-17 14:29:24,216 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 78 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2025-03-17 14:29:24,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 478 flow [2025-03-17 14:29:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:29:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:29:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2025-03-17 14:29:24,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2025-03-17 14:29:24,217 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 237 flow. Second operand 3 states and 117 transitions. [2025-03-17 14:29:24,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 478 flow [2025-03-17 14:29:24,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:24,220 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 249 flow [2025-03-17 14:29:24,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2025-03-17 14:29:24,221 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2025-03-17 14:29:24,221 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 249 flow [2025-03-17 14:29:24,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:29:24,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:24,221 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:24,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 14:29:24,221 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:24,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:24,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1452431739, now seen corresponding path program 1 times [2025-03-17 14:29:24,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:24,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557117003] [2025-03-17 14:29:24,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:29:24,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:24,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:29:24,233 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:29:24,233 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:24,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:24,431 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 14:29:24,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:24,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557117003] [2025-03-17 14:29:24,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557117003] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:24,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:24,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:29:24,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167119661] [2025-03-17 14:29:24,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:24,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:29:24,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:24,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:29:24,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:29:24,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 66 [2025-03-17 14:29:24,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 14:29:24,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:24,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 66 [2025-03-17 14:29:24,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:26,283 INFO L124 PetriNetUnfolderBase]: 23102/33239 cut-off events. [2025-03-17 14:29:26,284 INFO L125 PetriNetUnfolderBase]: For 17922/17922 co-relation queries the response was YES. [2025-03-17 14:29:26,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79534 conditions, 33239 events. 23102/33239 cut-off events. For 17922/17922 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 216985 event pairs, 2358 based on Foata normal form. 1142/32774 useless extension candidates. Maximal degree in co-relation 66756. Up to 16376 conditions per place. [2025-03-17 14:29:26,435 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 160 selfloop transitions, 14 changer transitions 8/190 dead transitions. [2025-03-17 14:29:26,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 190 transitions, 985 flow [2025-03-17 14:29:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:29:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:29:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 313 transitions. [2025-03-17 14:29:26,436 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5269360269360269 [2025-03-17 14:29:26,436 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 249 flow. Second operand 9 states and 313 transitions. [2025-03-17 14:29:26,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 190 transitions, 985 flow [2025-03-17 14:29:26,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 190 transitions, 980 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:26,442 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 367 flow [2025-03-17 14:29:26,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=367, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2025-03-17 14:29:26,443 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2025-03-17 14:29:26,443 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 367 flow [2025-03-17 14:29:26,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 14:29:26,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:26,443 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:26,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 14:29:26,443 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:26,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash -874914555, now seen corresponding path program 2 times [2025-03-17 14:29:26,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:26,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665776012] [2025-03-17 14:29:26,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:29:26,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:26,453 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-17 14:29:26,463 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:29:26,463 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:29:26,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:29:26,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:26,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665776012] [2025-03-17 14:29:26,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665776012] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:26,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:29:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335670058] [2025-03-17 14:29:26,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:26,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:29:26,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:26,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:29:26,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:29:26,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 66 [2025-03-17 14:29:26,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 367 flow. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:26,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:26,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 66 [2025-03-17 14:29:26,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:29,012 INFO L124 PetriNetUnfolderBase]: 23435/33761 cut-off events. [2025-03-17 14:29:29,012 INFO L125 PetriNetUnfolderBase]: For 45374/45374 co-relation queries the response was YES. [2025-03-17 14:29:29,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98861 conditions, 33761 events. 23435/33761 cut-off events. For 45374/45374 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 220870 event pairs, 5461 based on Foata normal form. 105/33845 useless extension candidates. Maximal degree in co-relation 82675. Up to 27744 conditions per place. [2025-03-17 14:29:29,258 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 100 selfloop transitions, 12 changer transitions 24/144 dead transitions. [2025-03-17 14:29:29,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 144 transitions, 878 flow [2025-03-17 14:29:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:29:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:29:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2025-03-17 14:29:29,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5252525252525253 [2025-03-17 14:29:29,259 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 367 flow. Second operand 6 states and 208 transitions. [2025-03-17 14:29:29,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 144 transitions, 878 flow [2025-03-17 14:29:29,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 144 transitions, 878 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:29:29,360 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 441 flow [2025-03-17 14:29:29,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=441, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2025-03-17 14:29:29,360 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 28 predicate places. [2025-03-17 14:29:29,360 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 441 flow [2025-03-17 14:29:29,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:29,360 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:29,361 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:29,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 14:29:29,361 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:29,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1491538895, now seen corresponding path program 3 times [2025-03-17 14:29:29,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:29,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170087145] [2025-03-17 14:29:29,361 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:29:29,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:29,368 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 2 equivalence classes. [2025-03-17 14:29:29,374 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 36 of 38 statements. [2025-03-17 14:29:29,375 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:29:29,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:29,584 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 14:29:29,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:29,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170087145] [2025-03-17 14:29:29,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170087145] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:29,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:29,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:29:29,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586430102] [2025-03-17 14:29:29,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:29,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:29:29,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:29,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:29:29,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:29:29,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 66 [2025-03-17 14:29:29,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 441 flow. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:29,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:29,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 66 [2025-03-17 14:29:29,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:32,401 INFO L124 PetriNetUnfolderBase]: 32207/46435 cut-off events. [2025-03-17 14:29:32,401 INFO L125 PetriNetUnfolderBase]: For 71108/71111 co-relation queries the response was YES. [2025-03-17 14:29:32,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141375 conditions, 46435 events. 32207/46435 cut-off events. For 71108/71111 co-relation queries the response was YES. Maximal size of possible extension queue 1605. Compared 319317 event pairs, 6710 based on Foata normal form. 1142/47554 useless extension candidates. Maximal degree in co-relation 117906. Up to 27785 conditions per place. [2025-03-17 14:29:32,778 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 175 selfloop transitions, 32 changer transitions 15/230 dead transitions. [2025-03-17 14:29:32,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 230 transitions, 1479 flow [2025-03-17 14:29:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:29:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:29:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 348 transitions. [2025-03-17 14:29:32,779 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2025-03-17 14:29:32,779 INFO L175 Difference]: Start difference. First operand has 96 places, 83 transitions, 441 flow. Second operand 10 states and 348 transitions. [2025-03-17 14:29:32,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 230 transitions, 1479 flow [2025-03-17 14:29:33,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 230 transitions, 1460 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:33,020 INFO L231 Difference]: Finished difference. Result has 109 places, 103 transitions, 699 flow [2025-03-17 14:29:33,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=699, PETRI_PLACES=109, PETRI_TRANSITIONS=103} [2025-03-17 14:29:33,020 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 41 predicate places. [2025-03-17 14:29:33,020 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 103 transitions, 699 flow [2025-03-17 14:29:33,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:33,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:33,021 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:33,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-17 14:29:33,021 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:33,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash 127024289, now seen corresponding path program 4 times [2025-03-17 14:29:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:33,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163986276] [2025-03-17 14:29:33,021 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:29:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:33,027 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-03-17 14:29:33,035 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:29:33,035 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:29:33,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:33,159 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 14:29:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163986276] [2025-03-17 14:29:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163986276] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:29:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696342524] [2025-03-17 14:29:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:33,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:29:33,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:33,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:29:33,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:29:33,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 66 [2025-03-17 14:29:33,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 103 transitions, 699 flow. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:33,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:33,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 66 [2025-03-17 14:29:33,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:37,143 INFO L124 PetriNetUnfolderBase]: 38927/56823 cut-off events. [2025-03-17 14:29:37,143 INFO L125 PetriNetUnfolderBase]: For 178508/178511 co-relation queries the response was YES. [2025-03-17 14:29:37,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199499 conditions, 56823 events. 38927/56823 cut-off events. For 178508/178511 co-relation queries the response was YES. Maximal size of possible extension queue 2014. Compared 407976 event pairs, 5180 based on Foata normal form. 511/57318 useless extension candidates. Maximal degree in co-relation 172473. Up to 17112 conditions per place. [2025-03-17 14:29:37,529 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 235 selfloop transitions, 36 changer transitions 10/289 dead transitions. [2025-03-17 14:29:37,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 289 transitions, 2273 flow [2025-03-17 14:29:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:29:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:29:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 333 transitions. [2025-03-17 14:29:37,531 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2025-03-17 14:29:37,531 INFO L175 Difference]: Start difference. First operand has 109 places, 103 transitions, 699 flow. Second operand 9 states and 333 transitions. [2025-03-17 14:29:37,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 289 transitions, 2273 flow [2025-03-17 14:29:38,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 289 transitions, 2228 flow, removed 19 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:38,867 INFO L231 Difference]: Finished difference. Result has 122 places, 121 transitions, 983 flow [2025-03-17 14:29:38,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=983, PETRI_PLACES=122, PETRI_TRANSITIONS=121} [2025-03-17 14:29:38,868 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2025-03-17 14:29:38,868 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 121 transitions, 983 flow [2025-03-17 14:29:38,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:38,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:38,868 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:38,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 14:29:38,868 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:38,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:38,869 INFO L85 PathProgramCache]: Analyzing trace with hash 729254873, now seen corresponding path program 5 times [2025-03-17 14:29:38,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:38,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088952912] [2025-03-17 14:29:38,869 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:29:38,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:38,875 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-17 14:29:38,881 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:29:38,881 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:29:38,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:39,065 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 14:29:39,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088952912] [2025-03-17 14:29:39,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088952912] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:39,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:39,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:29:39,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717750637] [2025-03-17 14:29:39,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:39,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:29:39,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:39,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:29:39,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:29:39,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 66 [2025-03-17 14:29:39,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 121 transitions, 983 flow. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:39,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:39,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 66 [2025-03-17 14:29:39,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:43,860 INFO L124 PetriNetUnfolderBase]: 37912/54889 cut-off events. [2025-03-17 14:29:43,860 INFO L125 PetriNetUnfolderBase]: For 248494/248497 co-relation queries the response was YES. [2025-03-17 14:29:44,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212833 conditions, 54889 events. 37912/54889 cut-off events. For 248494/248497 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 386918 event pairs, 11510 based on Foata normal form. 253/55119 useless extension candidates. Maximal degree in co-relation 186111. Up to 41721 conditions per place. [2025-03-17 14:29:44,223 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 149 selfloop transitions, 33 changer transitions 21/211 dead transitions. [2025-03-17 14:29:44,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 211 transitions, 1833 flow [2025-03-17 14:29:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:29:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:29:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 276 transitions. [2025-03-17 14:29:44,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2025-03-17 14:29:44,224 INFO L175 Difference]: Start difference. First operand has 122 places, 121 transitions, 983 flow. Second operand 8 states and 276 transitions. [2025-03-17 14:29:44,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 211 transitions, 1833 flow [2025-03-17 14:29:46,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 211 transitions, 1801 flow, removed 16 selfloop flow, removed 0 redundant places. [2025-03-17 14:29:46,524 INFO L231 Difference]: Finished difference. Result has 134 places, 121 transitions, 1065 flow [2025-03-17 14:29:46,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1065, PETRI_PLACES=134, PETRI_TRANSITIONS=121} [2025-03-17 14:29:46,525 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 66 predicate places. [2025-03-17 14:29:46,525 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 121 transitions, 1065 flow [2025-03-17 14:29:46,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:46,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:46,525 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:29:46,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 14:29:46,525 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:29:46,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:46,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1441461113, now seen corresponding path program 6 times [2025-03-17 14:29:46,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:46,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958394553] [2025-03-17 14:29:46,526 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:29:46,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:46,532 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 38 statements into 2 equivalence classes. [2025-03-17 14:29:46,537 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 36 of 38 statements. [2025-03-17 14:29:46,537 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 14:29:46,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:46,750 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 14:29:46,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:46,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958394553] [2025-03-17 14:29:46,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958394553] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:46,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:46,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:29:46,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59165396] [2025-03-17 14:29:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:46,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:29:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:46,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:29:46,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:29:46,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2025-03-17 14:29:46,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 121 transitions, 1065 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:29:46,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:46,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2025-03-17 14:29:46,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:55,949 INFO L124 PetriNetUnfolderBase]: 75063/104961 cut-off events. [2025-03-17 14:29:55,950 INFO L125 PetriNetUnfolderBase]: For 471173/471764 co-relation queries the response was YES. [2025-03-17 14:29:56,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405450 conditions, 104961 events. 75063/104961 cut-off events. For 471173/471764 co-relation queries the response was YES. Maximal size of possible extension queue 3594. Compared 748787 event pairs, 12831 based on Foata normal form. 846/99063 useless extension candidates. Maximal degree in co-relation 381812. Up to 66100 conditions per place. [2025-03-17 14:29:56,963 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 250 selfloop transitions, 79 changer transitions 6/345 dead transitions. [2025-03-17 14:29:56,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 345 transitions, 3564 flow [2025-03-17 14:29:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:29:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:29:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 319 transitions. [2025-03-17 14:29:56,965 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2025-03-17 14:29:56,965 INFO L175 Difference]: Start difference. First operand has 134 places, 121 transitions, 1065 flow. Second operand 9 states and 319 transitions. [2025-03-17 14:29:56,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 345 transitions, 3564 flow [2025-03-17 14:30:00,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 345 transitions, 3525 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 14:30:00,371 INFO L231 Difference]: Finished difference. Result has 143 places, 181 transitions, 2046 flow [2025-03-17 14:30:00,371 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2046, PETRI_PLACES=143, PETRI_TRANSITIONS=181} [2025-03-17 14:30:00,371 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 75 predicate places. [2025-03-17 14:30:00,371 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 181 transitions, 2046 flow [2025-03-17 14:30:00,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:00,372 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:00,372 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:00,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-17 14:30:00,372 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:30:00,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash 530553387, now seen corresponding path program 7 times [2025-03-17 14:30:00,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:00,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108327596] [2025-03-17 14:30:00,372 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:30:00,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:00,379 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:30:00,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:30:00,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:00,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:00,541 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 14:30:00,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:00,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108327596] [2025-03-17 14:30:00,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108327596] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:00,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:00,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:30:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142428784] [2025-03-17 14:30:00,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:00,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:30:00,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:00,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:30:00,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:30:00,550 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 66 [2025-03-17 14:30:00,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 181 transitions, 2046 flow. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:00,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:00,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 66 [2025-03-17 14:30:00,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand