./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sorted.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-sorted.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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:30:17,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:30:17,319 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:30:17,322 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:30:17,322 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:30:17,338 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:30:17,339 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:30:17,340 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:30:17,340 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:30:17,340 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:30:17,340 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:30:17,340 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:30:17,341 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:30:17,341 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:30:17,341 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:30:17,341 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:30:17,342 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:30:17,342 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:30:17,342 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:30:17,342 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:30:17,342 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:30:17,342 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:30:17,343 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:30:17,343 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:30:17,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:30:17,344 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:30:17,344 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:30:17,344 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:30:17,344 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:30:17,344 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 -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2025-03-17 14:30:17,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:30:17,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:30:17,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:30:17,578 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:30:17,579 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:30:17,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2025-03-17 14:30:18,714 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abeff62f8/dbe1cf765bee48fa93b6cdb88da0e4e1/FLAG89d27318e [2025-03-17 14:30:18,962 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:30:18,962 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2025-03-17 14:30:18,971 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abeff62f8/dbe1cf765bee48fa93b6cdb88da0e4e1/FLAG89d27318e [2025-03-17 14:30:19,289 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abeff62f8/dbe1cf765bee48fa93b6cdb88da0e4e1 [2025-03-17 14:30:19,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:30:19,292 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:30:19,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:30:19,293 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:30:19,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:30:19,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231103d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19, skipping insertion in model container [2025-03-17 14:30:19,296 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,308 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:30:19,440 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 14:30:19,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:30:19,453 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:30:19,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:30:19,487 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:30:19,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19 WrapperNode [2025-03-17 14:30:19,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:30:19,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:30:19,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:30:19,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:30:19,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,502 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,518 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2025-03-17 14:30:19,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:30:19,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:30:19,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:30:19,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:30:19,527 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,529 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,546 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 14:30:19,550 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,550 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,557 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,562 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,565 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:30:19,570 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:30:19,570 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:30:19,570 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:30:19,571 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (1/1) ... [2025-03-17 14:30:19,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:30:19,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:19,600 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 14:30:19,605 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 14:30:19,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:30:19,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:30:19,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:30:19,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:30:19,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:30:19,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:30:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:30:19,623 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 14:30:19,692 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:30:19,694 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:30:19,930 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:30:19,931 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:30:20,061 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:30:20,062 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:30:20,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:30:20 BoogieIcfgContainer [2025-03-17 14:30:20,062 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:30:20,065 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:30:20,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:30:20,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:30:20,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:30:19" (1/3) ... [2025-03-17 14:30:20,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10bb8e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:30:20, skipping insertion in model container [2025-03-17 14:30:20,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:30:19" (2/3) ... [2025-03-17 14:30:20,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10bb8e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:30:20, skipping insertion in model container [2025-03-17 14:30:20,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:30:20" (3/3) ... [2025-03-17 14:30:20,072 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2025-03-17 14:30:20,082 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:30:20,083 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-sorted.wvr.c that has 4 procedures, 53 locations, 1 initial locations, 4 loop locations, and 16 error locations. [2025-03-17 14:30:20,083 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:30:20,140 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 14:30:20,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 59 transitions, 139 flow [2025-03-17 14:30:20,192 INFO L124 PetriNetUnfolderBase]: 7/56 cut-off events. [2025-03-17 14:30:20,194 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:30:20,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 7/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2025-03-17 14:30:20,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 59 transitions, 139 flow [2025-03-17 14:30:20,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 55 transitions, 128 flow [2025-03-17 14:30:20,209 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:30:20,219 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;@4898aa18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:30:20,219 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2025-03-17 14:30:20,222 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:30:20,222 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:30:20,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:30:20,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:20,223 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:30:20,223 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:20,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash 392137, now seen corresponding path program 1 times [2025-03-17 14:30:20,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:20,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340418172] [2025-03-17 14:30:20,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:20,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:20,292 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:30:20,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:30:20,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:20,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:20,431 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 14:30:20,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:20,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340418172] [2025-03-17 14:30:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340418172] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:20,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:20,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:30:20,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751067024] [2025-03-17 14:30:20,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:20,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:30:20,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:20,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:30:20,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:30:20,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2025-03-17 14:30:20,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 14:30:20,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:20,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2025-03-17 14:30:20,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:20,740 INFO L124 PetriNetUnfolderBase]: 785/1534 cut-off events. [2025-03-17 14:30:20,741 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2025-03-17 14:30:20,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 1534 events. 785/1534 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9323 event pairs, 464 based on Foata normal form. 1/1061 useless extension candidates. Maximal degree in co-relation 2447. Up to 1061 conditions per place. [2025-03-17 14:30:20,754 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 27 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2025-03-17 14:30:20,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 180 flow [2025-03-17 14:30:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:30:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:30:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2025-03-17 14:30:20,768 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2025-03-17 14:30:20,770 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 128 flow. Second operand 3 states and 112 transitions. [2025-03-17 14:30:20,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 180 flow [2025-03-17 14:30:20,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 168 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:30:20,781 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 114 flow [2025-03-17 14:30:20,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2025-03-17 14:30:20,787 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2025-03-17 14:30:20,788 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 114 flow [2025-03-17 14:30:20,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 14:30:20,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:20,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:30:20,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:30:20,790 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:20,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:20,791 INFO L85 PathProgramCache]: Analyzing trace with hash 392138, now seen corresponding path program 1 times [2025-03-17 14:30:20,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:20,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808126054] [2025-03-17 14:30:20,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:20,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:30:20,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:30:20,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:20,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:21,031 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 14:30:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:21,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808126054] [2025-03-17 14:30:21,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808126054] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:21,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:21,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:30:21,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144490586] [2025-03-17 14:30:21,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:21,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:30:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:21,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:30:21,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:30:21,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2025-03-17 14:30:21,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:21,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:21,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2025-03-17 14:30:21,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:21,265 INFO L124 PetriNetUnfolderBase]: 786/1537 cut-off events. [2025-03-17 14:30:21,265 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-03-17 14:30:21,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1537 events. 786/1537 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9326 event pairs, 464 based on Foata normal form. 0/1063 useless extension candidates. Maximal degree in co-relation 2613. Up to 1066 conditions per place. [2025-03-17 14:30:21,274 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 29 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2025-03-17 14:30:21,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 188 flow [2025-03-17 14:30:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:30:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:30:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2025-03-17 14:30:21,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016949152542372 [2025-03-17 14:30:21,278 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 114 flow. Second operand 4 states and 142 transitions. [2025-03-17 14:30:21,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 188 flow [2025-03-17 14:30:21,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:30:21,281 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 137 flow [2025-03-17 14:30:21,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2025-03-17 14:30:21,281 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2025-03-17 14:30:21,282 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 137 flow [2025-03-17 14:30:21,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:30:21,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:21,282 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:30:21,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:30:21,283 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:21,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:21,285 INFO L85 PathProgramCache]: Analyzing trace with hash 376857161, now seen corresponding path program 1 times [2025-03-17 14:30:21,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:21,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683206641] [2025-03-17 14:30:21,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:21,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:21,292 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:30:21,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:30:21,306 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:21,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:21,531 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 14:30:21,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683206641] [2025-03-17 14:30:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683206641] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:21,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297689820] [2025-03-17 14:30:21,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:21,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:21,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:21,535 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 14:30:21,554 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 14:30:21,600 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:30:21,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:30:21,607 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:21,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:21,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:30:21,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:21,658 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 14:30:21,829 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 14:30:21,830 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:21,919 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 14:30:21,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297689820] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:21,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:21,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:30:21,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158498538] [2025-03-17 14:30:21,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:21,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:30:21,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:21,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:30:21,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:30:22,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2025-03-17 14:30:22,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 137 flow. Second operand has 11 states, 11 states have (on average 28.363636363636363) internal successors, (312), 11 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 14:30:22,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:22,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2025-03-17 14:30:22,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:22,394 INFO L124 PetriNetUnfolderBase]: 786/1536 cut-off events. [2025-03-17 14:30:22,394 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-03-17 14:30:22,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2642 conditions, 1536 events. 786/1536 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9304 event pairs, 464 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 2620. Up to 1062 conditions per place. [2025-03-17 14:30:22,403 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2025-03-17 14:30:22,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 197 flow [2025-03-17 14:30:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:30:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:30:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2025-03-17 14:30:22,407 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5508474576271186 [2025-03-17 14:30:22,407 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 137 flow. Second operand 6 states and 195 transitions. [2025-03-17 14:30:22,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 197 flow [2025-03-17 14:30:22,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:30:22,408 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 144 flow [2025-03-17 14:30:22,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2025-03-17 14:30:22,409 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2025-03-17 14:30:22,409 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 144 flow [2025-03-17 14:30:22,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.363636363636363) internal successors, (312), 11 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 14:30:22,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:22,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:22,417 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 14:30:22,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:22,610 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:22,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1470906127, now seen corresponding path program 1 times [2025-03-17 14:30:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:22,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082332102] [2025-03-17 14:30:22,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:22,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:22,615 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:30:22,617 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:30:22,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:22,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:22,679 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 14:30:22,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082332102] [2025-03-17 14:30:22,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082332102] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:22,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:22,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:30:22,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348555123] [2025-03-17 14:30:22,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:22,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:30:22,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:22,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:30:22,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:30:22,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 59 [2025-03-17 14:30:22,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 144 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 14:30:22,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:22,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 59 [2025-03-17 14:30:22,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:22,853 INFO L124 PetriNetUnfolderBase]: 1371/2153 cut-off events. [2025-03-17 14:30:22,853 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-03-17 14:30:22,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4074 conditions, 2153 events. 1371/2153 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10507 event pairs, 893 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 4048. Up to 1859 conditions per place. [2025-03-17 14:30:22,862 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 32 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2025-03-17 14:30:22,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 202 flow [2025-03-17 14:30:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:30:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:30:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2025-03-17 14:30:22,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4661016949152542 [2025-03-17 14:30:22,864 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 144 flow. Second operand 4 states and 110 transitions. [2025-03-17 14:30:22,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 202 flow [2025-03-17 14:30:22,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 172 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-17 14:30:22,866 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 108 flow [2025-03-17 14:30:22,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2025-03-17 14:30:22,867 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2025-03-17 14:30:22,867 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 108 flow [2025-03-17 14:30:22,868 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 14:30:22,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:22,868 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:22,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:30:22,868 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:22,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1470906128, now seen corresponding path program 1 times [2025-03-17 14:30:22,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:22,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521662923] [2025-03-17 14:30:22,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:22,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:22,875 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:30:22,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:30:22,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:22,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:22,921 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 14:30:22,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:22,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521662923] [2025-03-17 14:30:22,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521662923] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:22,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:22,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:30:22,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823500503] [2025-03-17 14:30:22,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:22,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:30:22,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:22,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:30:22,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:30:22,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:30:22,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 14:30:22,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:22,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:30:22,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:23,026 INFO L124 PetriNetUnfolderBase]: 785/1401 cut-off events. [2025-03-17 14:30:23,027 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-03-17 14:30:23,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1401 events. 785/1401 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7522 event pairs, 464 based on Foata normal form. 1/1063 useless extension candidates. Maximal degree in co-relation 2479. Up to 1064 conditions per place. [2025-03-17 14:30:23,033 INFO L140 encePairwiseOnDemand]: 56/59 looper letters, 29 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2025-03-17 14:30:23,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 166 flow [2025-03-17 14:30:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:30:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:30:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2025-03-17 14:30:23,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.655367231638418 [2025-03-17 14:30:23,034 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 108 flow. Second operand 3 states and 116 transitions. [2025-03-17 14:30:23,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 166 flow [2025-03-17 14:30:23,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 163 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:30:23,036 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 105 flow [2025-03-17 14:30:23,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2025-03-17 14:30:23,037 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2025-03-17 14:30:23,037 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 105 flow [2025-03-17 14:30:23,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 14:30:23,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:23,037 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:23,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:30:23,037 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:23,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1517768207, now seen corresponding path program 1 times [2025-03-17 14:30:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479329849] [2025-03-17 14:30:23,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:23,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:23,044 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:30:23,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:30:23,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:23,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:23,130 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 14:30:23,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:23,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479329849] [2025-03-17 14:30:23,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479329849] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:23,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114328559] [2025-03-17 14:30:23,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:23,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:23,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:23,134 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 14:30:23,136 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 14:30:23,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:30:23,186 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:30:23,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:23,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:23,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:30:23,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:23,230 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 14:30:23,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:23,268 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 14:30:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114328559] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:23,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:23,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 14:30:23,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836608149] [2025-03-17 14:30:23,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:23,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:30:23,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:23,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:30:23,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:30:23,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:30:23,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 105 flow. Second operand has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 0 states have call successors, (0), 0 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 14:30:23,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:23,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:30:23,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:23,527 INFO L124 PetriNetUnfolderBase]: 1237/2179 cut-off events. [2025-03-17 14:30:23,528 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-17 14:30:23,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3940 conditions, 2179 events. 1237/2179 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12441 event pairs, 645 based on Foata normal form. 0/1717 useless extension candidates. Maximal degree in co-relation 3929. Up to 1063 conditions per place. [2025-03-17 14:30:23,534 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 63 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2025-03-17 14:30:23,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 87 transitions, 336 flow [2025-03-17 14:30:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:30:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:30:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2025-03-17 14:30:23,536 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.648910411622276 [2025-03-17 14:30:23,536 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 105 flow. Second operand 7 states and 268 transitions. [2025-03-17 14:30:23,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 87 transitions, 336 flow [2025-03-17 14:30:23,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:30:23,539 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 150 flow [2025-03-17 14:30:23,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2025-03-17 14:30:23,540 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2025-03-17 14:30:23,540 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 150 flow [2025-03-17 14:30:23,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 0 states have call successors, (0), 0 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 14:30:23,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:23,540 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:23,546 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 14:30:23,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-17 14:30:23,741 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:23,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2051355742, now seen corresponding path program 1 times [2025-03-17 14:30:23,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:23,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250406672] [2025-03-17 14:30:23,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:23,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:23,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:30:23,752 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:30:23,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:23,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:23,824 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 14:30:23,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250406672] [2025-03-17 14:30:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250406672] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672827253] [2025-03-17 14:30:23,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:23,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:23,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:23,826 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 14:30:23,828 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 14:30:23,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:30:23,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:30:23,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:23,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:23,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:30:23,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:23,914 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 14:30:23,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:23,953 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 14:30:23,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672827253] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:23,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:23,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-03-17 14:30:23,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115885759] [2025-03-17 14:30:23,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:23,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:30:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:23,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:30:23,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:30:24,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:30:24,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 14:30:24,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:24,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:30:24,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:24,245 INFO L124 PetriNetUnfolderBase]: 1007/1815 cut-off events. [2025-03-17 14:30:24,245 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2025-03-17 14:30:24,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3569 conditions, 1815 events. 1007/1815 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10273 event pairs, 564 based on Foata normal form. 0/1421 useless extension candidates. Maximal degree in co-relation 2629. Up to 1060 conditions per place. [2025-03-17 14:30:24,251 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 56 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2025-03-17 14:30:24,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 350 flow [2025-03-17 14:30:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:30:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:30:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2025-03-17 14:30:24,252 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6319612590799032 [2025-03-17 14:30:24,252 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 150 flow. Second operand 7 states and 261 transitions. [2025-03-17 14:30:24,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 350 flow [2025-03-17 14:30:24,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:30:24,254 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 179 flow [2025-03-17 14:30:24,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=179, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2025-03-17 14:30:24,254 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2025-03-17 14:30:24,254 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 179 flow [2025-03-17 14:30:24,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 14:30:24,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:24,254 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:24,261 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 14:30:24,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:24,455 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:24,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash -692414130, now seen corresponding path program 2 times [2025-03-17 14:30:24,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:24,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460621258] [2025-03-17 14:30:24,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:24,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:24,461 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-17 14:30:24,466 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 11 statements. [2025-03-17 14:30:24,466 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:30:24,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:30:24,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:24,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460621258] [2025-03-17 14:30:24,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460621258] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:24,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:24,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:30:24,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017296502] [2025-03-17 14:30:24,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:24,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:30:24,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:24,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:30:24,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:30:24,685 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-03-17 14:30:24,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 14:30:24,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:24,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-03-17 14:30:24,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:24,929 INFO L124 PetriNetUnfolderBase]: 1747/2981 cut-off events. [2025-03-17 14:30:24,930 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2025-03-17 14:30:24,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6295 conditions, 2981 events. 1747/2981 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17241 event pairs, 691 based on Foata normal form. 62/2387 useless extension candidates. Maximal degree in co-relation 5197. Up to 1747 conditions per place. [2025-03-17 14:30:24,947 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 67 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2025-03-17 14:30:24,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 431 flow [2025-03-17 14:30:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:30:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:30:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2025-03-17 14:30:24,949 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6299435028248588 [2025-03-17 14:30:24,949 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 179 flow. Second operand 6 states and 223 transitions. [2025-03-17 14:30:24,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 431 flow [2025-03-17 14:30:24,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:30:24,951 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 213 flow [2025-03-17 14:30:24,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2025-03-17 14:30:24,951 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 7 predicate places. [2025-03-17 14:30:24,951 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 213 flow [2025-03-17 14:30:24,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 14:30:24,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:24,954 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:24,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:30:24,954 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:24,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:24,955 INFO L85 PathProgramCache]: Analyzing trace with hash -27770079, now seen corresponding path program 2 times [2025-03-17 14:30:24,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:24,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981039564] [2025-03-17 14:30:24,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:24,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:24,959 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-17 14:30:24,965 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 13 statements. [2025-03-17 14:30:24,966 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:30:24,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:30:25,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:25,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981039564] [2025-03-17 14:30:25,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981039564] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:25,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:25,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:30:25,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954743030] [2025-03-17 14:30:25,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:25,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:30:25,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:25,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:30:25,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:30:25,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-03-17 14:30:25,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 14:30:25,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:25,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-03-17 14:30:25,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:25,509 INFO L124 PetriNetUnfolderBase]: 2787/4654 cut-off events. [2025-03-17 14:30:25,510 INFO L125 PetriNetUnfolderBase]: For 2833/2905 co-relation queries the response was YES. [2025-03-17 14:30:25,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11024 conditions, 4654 events. 2787/4654 cut-off events. For 2833/2905 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28663 event pairs, 1116 based on Foata normal form. 101/3861 useless extension candidates. Maximal degree in co-relation 9823. Up to 2697 conditions per place. [2025-03-17 14:30:25,529 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 74 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2025-03-17 14:30:25,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 539 flow [2025-03-17 14:30:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:30:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:30:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2025-03-17 14:30:25,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6242937853107344 [2025-03-17 14:30:25,532 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 213 flow. Second operand 6 states and 221 transitions. [2025-03-17 14:30:25,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 539 flow [2025-03-17 14:30:25,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 508 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-17 14:30:25,541 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 243 flow [2025-03-17 14:30:25,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2025-03-17 14:30:25,541 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2025-03-17 14:30:25,541 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 243 flow [2025-03-17 14:30:25,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 14:30:25,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:25,542 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:25,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:30:25,542 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:25,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:25,542 INFO L85 PathProgramCache]: Analyzing trace with hash -799302183, now seen corresponding path program 1 times [2025-03-17 14:30:25,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:25,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573530421] [2025-03-17 14:30:25,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:25,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:25,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:30:25,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:30:25,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:25,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:25,630 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 14:30:25,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:25,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573530421] [2025-03-17 14:30:25,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573530421] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:25,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538815171] [2025-03-17 14:30:25,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:25,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:25,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:25,632 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 14:30:25,634 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 14:30:25,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:30:25,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:30:25,681 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:25,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:25,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:30:25,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:25,753 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 14:30:25,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:25,797 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 14:30:25,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538815171] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:25,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:25,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 14:30:25,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496755652] [2025-03-17 14:30:25,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:25,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:30:25,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:25,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:30:25,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:30:25,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:30:25,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 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 14:30:25,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:25,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:30:25,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:26,180 INFO L124 PetriNetUnfolderBase]: 2156/3903 cut-off events. [2025-03-17 14:30:26,181 INFO L125 PetriNetUnfolderBase]: For 3459/3517 co-relation queries the response was YES. [2025-03-17 14:30:26,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9762 conditions, 3903 events. 2156/3903 cut-off events. For 3459/3517 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25899 event pairs, 1169 based on Foata normal form. 0/3230 useless extension candidates. Maximal degree in co-relation 8928. Up to 2652 conditions per place. [2025-03-17 14:30:26,195 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 55 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2025-03-17 14:30:26,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 441 flow [2025-03-17 14:30:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:30:26,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:30:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 254 transitions. [2025-03-17 14:30:26,196 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6150121065375302 [2025-03-17 14:30:26,196 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 243 flow. Second operand 7 states and 254 transitions. [2025-03-17 14:30:26,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 441 flow [2025-03-17 14:30:26,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 424 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 14:30:26,200 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 259 flow [2025-03-17 14:30:26,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2025-03-17 14:30:26,200 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2025-03-17 14:30:26,200 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 259 flow [2025-03-17 14:30:26,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 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 14:30:26,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:26,201 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:26,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:26,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:26,402 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:26,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:26,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1019912504, now seen corresponding path program 1 times [2025-03-17 14:30:26,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:26,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272777426] [2025-03-17 14:30:26,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:26,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:26,407 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:30:26,411 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:30:26,411 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:26,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:30:26,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:26,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272777426] [2025-03-17 14:30:26,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272777426] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:26,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107604276] [2025-03-17 14:30:26,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:26,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:26,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:26,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:26,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:30:26,511 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:30:26,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:30:26,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:26,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:26,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:30:26,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:30:26,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:30:26,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107604276] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:26,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-03-17 14:30:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232086977] [2025-03-17 14:30:26,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:26,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:30:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:26,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:30:26,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:30:26,698 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:30:26,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 259 flow. Second operand has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 states have internal predecessors, (506), 0 states have call successors, (0), 0 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 14:30:26,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:26,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:30:26,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:27,177 INFO L124 PetriNetUnfolderBase]: 3721/6551 cut-off events. [2025-03-17 14:30:27,177 INFO L125 PetriNetUnfolderBase]: For 5032/5143 co-relation queries the response was YES. [2025-03-17 14:30:27,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 6551 events. 3721/6551 cut-off events. For 5032/5143 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45556 event pairs, 1516 based on Foata normal form. 0/5541 useless extension candidates. Maximal degree in co-relation 8949. Up to 2694 conditions per place. [2025-03-17 14:30:27,203 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 104 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2025-03-17 14:30:27,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 784 flow [2025-03-17 14:30:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:30:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:30:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 346 transitions. [2025-03-17 14:30:27,205 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6516007532956686 [2025-03-17 14:30:27,205 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 259 flow. Second operand 9 states and 346 transitions. [2025-03-17 14:30:27,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 784 flow [2025-03-17 14:30:27,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 769 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:30:27,213 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 346 flow [2025-03-17 14:30:27,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=346, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2025-03-17 14:30:27,213 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2025-03-17 14:30:27,213 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 346 flow [2025-03-17 14:30:27,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 states have internal predecessors, (506), 0 states have call successors, (0), 0 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 14:30:27,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:27,214 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:27,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 14:30:27,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-17 14:30:27,418 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:27,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1753665128, now seen corresponding path program 2 times [2025-03-17 14:30:27,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:27,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229199287] [2025-03-17 14:30:27,419 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:27,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:27,425 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:30:27,434 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:30:27,434 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:27,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:30:27,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:27,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229199287] [2025-03-17 14:30:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229199287] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:27,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679548331] [2025-03-17 14:30:27,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:27,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:27,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:27,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:30:27,610 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:30:27,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:30:27,624 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:27,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:27,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 14:30:27,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:27,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 14:30:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:30:27,770 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:30:27,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679548331] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:27,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:30:27,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2025-03-17 14:30:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864405209] [2025-03-17 14:30:27,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:27,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:30:27,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:27,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:30:27,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:30:27,892 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-03-17 14:30:27,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 14:30:27,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:27,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-03-17 14:30:27,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:28,342 INFO L124 PetriNetUnfolderBase]: 3596/6222 cut-off events. [2025-03-17 14:30:28,342 INFO L125 PetriNetUnfolderBase]: For 8347/8405 co-relation queries the response was YES. [2025-03-17 14:30:28,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17026 conditions, 6222 events. 3596/6222 cut-off events. For 8347/8405 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42345 event pairs, 976 based on Foata normal form. 242/5528 useless extension candidates. Maximal degree in co-relation 12691. Up to 2281 conditions per place. [2025-03-17 14:30:28,369 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 93 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2025-03-17 14:30:28,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 848 flow [2025-03-17 14:30:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:30:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:30:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2025-03-17 14:30:28,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016949152542372 [2025-03-17 14:30:28,370 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 346 flow. Second operand 6 states and 213 transitions. [2025-03-17 14:30:28,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 848 flow [2025-03-17 14:30:28,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 117 transitions, 829 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-17 14:30:28,381 INFO L231 Difference]: Finished difference. Result has 84 places, 67 transitions, 351 flow [2025-03-17 14:30:28,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2025-03-17 14:30:28,381 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 26 predicate places. [2025-03-17 14:30:28,381 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 351 flow [2025-03-17 14:30:28,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 14:30:28,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:28,381 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:28,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:30:28,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:28,582 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:28,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1499432281, now seen corresponding path program 2 times [2025-03-17 14:30:28,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:28,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165036151] [2025-03-17 14:30:28,583 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:28,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:28,587 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-17 14:30:28,592 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:30:28,592 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:28,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-17 14:30:28,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:28,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165036151] [2025-03-17 14:30:28,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165036151] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:28,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:28,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:30:28,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333778627] [2025-03-17 14:30:28,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:28,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:30:28,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:28,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:30:28,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:30:28,654 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-03-17 14:30:28,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 351 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 14:30:28,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:28,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-03-17 14:30:28,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:29,305 INFO L124 PetriNetUnfolderBase]: 7354/11452 cut-off events. [2025-03-17 14:30:29,306 INFO L125 PetriNetUnfolderBase]: For 13198/13418 co-relation queries the response was YES. [2025-03-17 14:30:29,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33387 conditions, 11452 events. 7354/11452 cut-off events. For 13198/13418 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 73331 event pairs, 2851 based on Foata normal form. 0/9715 useless extension candidates. Maximal degree in co-relation 20892. Up to 5943 conditions per place. [2025-03-17 14:30:29,358 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 111 selfloop transitions, 10 changer transitions 0/133 dead transitions. [2025-03-17 14:30:29,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 133 transitions, 868 flow [2025-03-17 14:30:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:30:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:30:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2025-03-17 14:30:29,360 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7322033898305085 [2025-03-17 14:30:29,360 INFO L175 Difference]: Start difference. First operand has 84 places, 67 transitions, 351 flow. Second operand 5 states and 216 transitions. [2025-03-17 14:30:29,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 133 transitions, 868 flow [2025-03-17 14:30:29,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 824 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:30:29,391 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 413 flow [2025-03-17 14:30:29,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2025-03-17 14:30:29,392 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 29 predicate places. [2025-03-17 14:30:29,392 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 413 flow [2025-03-17 14:30:29,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 14:30:29,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:29,392 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:29,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 14:30:29,392 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:29,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:29,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1631612240, now seen corresponding path program 1 times [2025-03-17 14:30:29,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:29,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925721283] [2025-03-17 14:30:29,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:29,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:29,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:30:29,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:30:29,401 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:29,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:30:29,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:29,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925721283] [2025-03-17 14:30:29,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925721283] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:29,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716543854] [2025-03-17 14:30:29,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:29,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:29,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:29,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:29,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:30:29,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:30:29,580 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:30:29,581 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:29,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:29,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:30:29,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:30:29,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:30:29,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716543854] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:29,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:29,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-17 14:30:29,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360539563] [2025-03-17 14:30:29,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:29,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:30:29,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:29,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:30:29,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:30:29,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:30:29,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 413 flow. Second operand has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 0 states have call successors, (0), 0 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 14:30:29,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:29,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:30:29,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:30,527 INFO L124 PetriNetUnfolderBase]: 4515/7758 cut-off events. [2025-03-17 14:30:30,527 INFO L125 PetriNetUnfolderBase]: For 12512/12758 co-relation queries the response was YES. [2025-03-17 14:30:30,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22388 conditions, 7758 events. 4515/7758 cut-off events. For 12512/12758 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 53164 event pairs, 2123 based on Foata normal form. 146/7023 useless extension candidates. Maximal degree in co-relation 14901. Up to 3902 conditions per place. [2025-03-17 14:30:30,568 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 103 selfloop transitions, 14 changer transitions 0/132 dead transitions. [2025-03-17 14:30:30,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 132 transitions, 933 flow [2025-03-17 14:30:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:30:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:30:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 344 transitions. [2025-03-17 14:30:30,569 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.647834274952919 [2025-03-17 14:30:30,569 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 413 flow. Second operand 9 states and 344 transitions. [2025-03-17 14:30:30,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 132 transitions, 933 flow [2025-03-17 14:30:30,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 132 transitions, 931 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-17 14:30:30,592 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 483 flow [2025-03-17 14:30:30,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=483, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2025-03-17 14:30:30,593 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 40 predicate places. [2025-03-17 14:30:30,593 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 483 flow [2025-03-17 14:30:30,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 0 states have call successors, (0), 0 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 14:30:30,593 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:30,593 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:30,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 14:30:30,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:30,794 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:30,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:30,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1175454974, now seen corresponding path program 1 times [2025-03-17 14:30:30,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:30,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626766671] [2025-03-17 14:30:30,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:30,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:30,800 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:30:30,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:30:30,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:30,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:30:31,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626766671] [2025-03-17 14:30:31,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626766671] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760838931] [2025-03-17 14:30:31,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:31,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:31,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:31,011 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:31,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:30:31,055 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:30:31,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:30:31,069 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:31,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:31,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:30:31,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:30:31,153 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:30:31,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760838931] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:31,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:30:31,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2025-03-17 14:30:31,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207518302] [2025-03-17 14:30:31,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:31,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:30:31,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:31,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:30:31,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:30:31,204 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-03-17 14:30:31,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 483 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 14:30:31,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:31,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-03-17 14:30:31,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:31,832 INFO L124 PetriNetUnfolderBase]: 5531/8835 cut-off events. [2025-03-17 14:30:31,832 INFO L125 PetriNetUnfolderBase]: For 15632/15820 co-relation queries the response was YES. [2025-03-17 14:30:31,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28759 conditions, 8835 events. 5531/8835 cut-off events. For 15632/15820 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 56822 event pairs, 1037 based on Foata normal form. 98/8173 useless extension candidates. Maximal degree in co-relation 20921. Up to 2583 conditions per place. [2025-03-17 14:30:31,874 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 134 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2025-03-17 14:30:31,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 167 transitions, 1249 flow [2025-03-17 14:30:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:30:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:30:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 305 transitions. [2025-03-17 14:30:31,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6461864406779662 [2025-03-17 14:30:31,875 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 483 flow. Second operand 8 states and 305 transitions. [2025-03-17 14:30:31,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 167 transitions, 1249 flow [2025-03-17 14:30:31,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 167 transitions, 1217 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-03-17 14:30:31,959 INFO L231 Difference]: Finished difference. Result has 99 places, 79 transitions, 515 flow [2025-03-17 14:30:31,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=515, PETRI_PLACES=99, PETRI_TRANSITIONS=79} [2025-03-17 14:30:31,960 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 41 predicate places. [2025-03-17 14:30:31,960 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 79 transitions, 515 flow [2025-03-17 14:30:31,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 14:30:31,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:31,960 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:31,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:32,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 14:30:32,160 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:32,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:32,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1406350031, now seen corresponding path program 2 times [2025-03-17 14:30:32,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:32,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405857046] [2025-03-17 14:30:32,161 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:32,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:32,166 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 14:30:32,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:30:32,171 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:32,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-17 14:30:32,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:32,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405857046] [2025-03-17 14:30:32,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405857046] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:32,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:32,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:30:32,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640513421] [2025-03-17 14:30:32,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:32,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:30:32,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:32,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:30:32,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:30:32,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-03-17 14:30:32,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 79 transitions, 515 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:30:32,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:32,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-03-17 14:30:32,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:33,022 INFO L124 PetriNetUnfolderBase]: 9271/14004 cut-off events. [2025-03-17 14:30:33,023 INFO L125 PetriNetUnfolderBase]: For 32644/32716 co-relation queries the response was YES. [2025-03-17 14:30:33,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46413 conditions, 14004 events. 9271/14004 cut-off events. For 32644/32716 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 86854 event pairs, 4080 based on Foata normal form. 0/12369 useless extension candidates. Maximal degree in co-relation 32920. Up to 7952 conditions per place. [2025-03-17 14:30:33,078 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 149 selfloop transitions, 10 changer transitions 0/171 dead transitions. [2025-03-17 14:30:33,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 171 transitions, 1425 flow [2025-03-17 14:30:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:30:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:30:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 212 transitions. [2025-03-17 14:30:33,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7186440677966102 [2025-03-17 14:30:33,079 INFO L175 Difference]: Start difference. First operand has 99 places, 79 transitions, 515 flow. Second operand 5 states and 212 transitions. [2025-03-17 14:30:33,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 171 transitions, 1425 flow [2025-03-17 14:30:33,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 171 transitions, 1345 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-03-17 14:30:33,116 INFO L231 Difference]: Finished difference. Result has 103 places, 85 transitions, 567 flow [2025-03-17 14:30:33,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=567, PETRI_PLACES=103, PETRI_TRANSITIONS=85} [2025-03-17 14:30:33,117 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 45 predicate places. [2025-03-17 14:30:33,117 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 85 transitions, 567 flow [2025-03-17 14:30:33,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:30:33,117 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:33,117 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:33,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 14:30:33,117 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:33,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2079366158, now seen corresponding path program 1 times [2025-03-17 14:30:33,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:33,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681883614] [2025-03-17 14:30:33,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:33,122 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:30:33,125 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:30:33,125 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:33,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:30:33,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681883614] [2025-03-17 14:30:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681883614] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607538812] [2025-03-17 14:30:33,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:33,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:33,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:33,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:33,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:30:33,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:30:33,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:30:33,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:33,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:33,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:30:33,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:33,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 14:30:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:30:33,463 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:30:33,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607538812] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:33,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:33,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2025-03-17 14:30:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479750092] [2025-03-17 14:30:33,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:33,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 14:30:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:33,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 14:30:33,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:30:34,178 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2025-03-17 14:30:34,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 85 transitions, 567 flow. Second operand has 26 states, 26 states have (on average 23.96153846153846) internal successors, (623), 26 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 14:30:34,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:34,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2025-03-17 14:30:34,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:36,037 INFO L124 PetriNetUnfolderBase]: 14597/21769 cut-off events. [2025-03-17 14:30:36,038 INFO L125 PetriNetUnfolderBase]: For 49723/50449 co-relation queries the response was YES. [2025-03-17 14:30:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72356 conditions, 21769 events. 14597/21769 cut-off events. For 49723/50449 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 134146 event pairs, 5322 based on Foata normal form. 702/21497 useless extension candidates. Maximal degree in co-relation 57202. Up to 7700 conditions per place. [2025-03-17 14:30:36,137 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 177 selfloop transitions, 20 changer transitions 0/208 dead transitions. [2025-03-17 14:30:36,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 208 transitions, 1540 flow [2025-03-17 14:30:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:30:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:30:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 392 transitions. [2025-03-17 14:30:36,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6040061633281972 [2025-03-17 14:30:36,138 INFO L175 Difference]: Start difference. First operand has 103 places, 85 transitions, 567 flow. Second operand 11 states and 392 transitions. [2025-03-17 14:30:36,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 208 transitions, 1540 flow [2025-03-17 14:30:36,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 208 transitions, 1532 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-03-17 14:30:36,231 INFO L231 Difference]: Finished difference. Result has 116 places, 92 transitions, 682 flow [2025-03-17 14:30:36,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=682, PETRI_PLACES=116, PETRI_TRANSITIONS=92} [2025-03-17 14:30:36,231 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 58 predicate places. [2025-03-17 14:30:36,231 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 92 transitions, 682 flow [2025-03-17 14:30:36,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.96153846153846) internal successors, (623), 26 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 14:30:36,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:36,232 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:36,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:36,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:30:36,432 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:36,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:36,433 INFO L85 PathProgramCache]: Analyzing trace with hash 448318486, now seen corresponding path program 1 times [2025-03-17 14:30:36,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:36,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973756556] [2025-03-17 14:30:36,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:36,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:36,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:30:36,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:30:36,444 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:36,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:30:36,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:36,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973756556] [2025-03-17 14:30:36,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973756556] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:36,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937720785] [2025-03-17 14:30:36,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:36,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:36,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:36,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:36,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:30:36,624 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:30:36,639 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:30:36,639 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:36,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:36,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:30:36,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:30:36,725 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:30:36,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937720785] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:36,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:30:36,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2025-03-17 14:30:36,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496390272] [2025-03-17 14:30:36,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:36,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:30:36,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:36,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:30:36,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:30:36,794 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-03-17 14:30:36,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 92 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 14:30:36,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:36,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-03-17 14:30:36,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:37,877 INFO L124 PetriNetUnfolderBase]: 9917/15554 cut-off events. [2025-03-17 14:30:37,877 INFO L125 PetriNetUnfolderBase]: For 49987/50189 co-relation queries the response was YES. [2025-03-17 14:30:37,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56447 conditions, 15554 events. 9917/15554 cut-off events. For 49987/50189 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 102233 event pairs, 1714 based on Foata normal form. 228/15027 useless extension candidates. Maximal degree in co-relation 44025. Up to 4749 conditions per place. [2025-03-17 14:30:37,979 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 202 selfloop transitions, 20 changer transitions 0/235 dead transitions. [2025-03-17 14:30:37,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 235 transitions, 2227 flow [2025-03-17 14:30:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:30:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:30:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 301 transitions. [2025-03-17 14:30:37,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6377118644067796 [2025-03-17 14:30:37,981 INFO L175 Difference]: Start difference. First operand has 116 places, 92 transitions, 682 flow. Second operand 8 states and 301 transitions. [2025-03-17 14:30:37,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 235 transitions, 2227 flow [2025-03-17 14:30:38,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 235 transitions, 2117 flow, removed 27 selfloop flow, removed 7 redundant places. [2025-03-17 14:30:38,255 INFO L231 Difference]: Finished difference. Result has 115 places, 94 transitions, 690 flow [2025-03-17 14:30:38,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=690, PETRI_PLACES=115, PETRI_TRANSITIONS=94} [2025-03-17 14:30:38,256 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 57 predicate places. [2025-03-17 14:30:38,256 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 94 transitions, 690 flow [2025-03-17 14:30:38,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 14:30:38,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:38,256 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:38,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:38,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-17 14:30:38,460 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:38,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1012971522, now seen corresponding path program 1 times [2025-03-17 14:30:38,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:38,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374148223] [2025-03-17 14:30:38,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:38,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:38,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:30:38,468 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:38,468 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:38,468 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-17 14:30:38,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:38,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374148223] [2025-03-17 14:30:38,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374148223] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:38,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365217759] [2025-03-17 14:30:38,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:38,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:38,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:38,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:38,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:30:38,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:30:38,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:38,657 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:38,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:38,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:30:38,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:30:38,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:38,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2025-03-17 14:30:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:30:38,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365217759] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:38,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:38,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 18 [2025-03-17 14:30:38,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977442867] [2025-03-17 14:30:38,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:38,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 14:30:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:38,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 14:30:38,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-03-17 14:30:39,513 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2025-03-17 14:30:39,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 94 transitions, 690 flow. Second operand has 20 states, 20 states have (on average 25.4) internal successors, (508), 20 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 14:30:39,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:39,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2025-03-17 14:30:39,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:42,225 INFO L124 PetriNetUnfolderBase]: 19605/29295 cut-off events. [2025-03-17 14:30:42,225 INFO L125 PetriNetUnfolderBase]: For 88169/88169 co-relation queries the response was YES. [2025-03-17 14:30:42,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106289 conditions, 29295 events. 19605/29295 cut-off events. For 88169/88169 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 186762 event pairs, 4234 based on Foata normal form. 556/28637 useless extension candidates. Maximal degree in co-relation 89792. Up to 6790 conditions per place. [2025-03-17 14:30:42,480 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 250 selfloop transitions, 26 changer transitions 0/286 dead transitions. [2025-03-17 14:30:42,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 286 transitions, 2394 flow [2025-03-17 14:30:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 14:30:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 14:30:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 500 transitions. [2025-03-17 14:30:42,481 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6053268765133172 [2025-03-17 14:30:42,481 INFO L175 Difference]: Start difference. First operand has 115 places, 94 transitions, 690 flow. Second operand 14 states and 500 transitions. [2025-03-17 14:30:42,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 286 transitions, 2394 flow [2025-03-17 14:30:43,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 286 transitions, 2347 flow, removed 8 selfloop flow, removed 5 redundant places. [2025-03-17 14:30:43,012 INFO L231 Difference]: Finished difference. Result has 127 places, 103 transitions, 808 flow [2025-03-17 14:30:43,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=808, PETRI_PLACES=127, PETRI_TRANSITIONS=103} [2025-03-17 14:30:43,013 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 69 predicate places. [2025-03-17 14:30:43,013 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 103 transitions, 808 flow [2025-03-17 14:30:43,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 25.4) internal successors, (508), 20 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 14:30:43,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:43,013 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] [2025-03-17 14:30:43,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 14:30:43,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:43,214 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:43,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:43,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2055708219, now seen corresponding path program 1 times [2025-03-17 14:30:43,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:43,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709538697] [2025-03-17 14:30:43,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:43,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:43,219 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:30:43,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:30:43,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:43,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:30:43,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709538697] [2025-03-17 14:30:43,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709538697] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:43,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:43,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:30:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063005299] [2025-03-17 14:30:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:43,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:30:43,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:43,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:30:43,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:30:43,314 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:30:43,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 103 transitions, 808 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 14:30:43,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:43,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:30:43,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:44,602 INFO L124 PetriNetUnfolderBase]: 13939/21817 cut-off events. [2025-03-17 14:30:44,602 INFO L125 PetriNetUnfolderBase]: For 88522/88618 co-relation queries the response was YES. [2025-03-17 14:30:44,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84257 conditions, 21817 events. 13939/21817 cut-off events. For 88522/88618 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 147275 event pairs, 2902 based on Foata normal form. 3/20650 useless extension candidates. Maximal degree in co-relation 69469. Up to 16656 conditions per place. [2025-03-17 14:30:44,751 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 104 selfloop transitions, 11 changer transitions 8/138 dead transitions. [2025-03-17 14:30:44,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 138 transitions, 1304 flow [2025-03-17 14:30:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:30:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:30:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2025-03-17 14:30:44,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7740112994350282 [2025-03-17 14:30:44,752 INFO L175 Difference]: Start difference. First operand has 127 places, 103 transitions, 808 flow. Second operand 3 states and 137 transitions. [2025-03-17 14:30:44,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 138 transitions, 1304 flow [2025-03-17 14:30:44,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 138 transitions, 1257 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-03-17 14:30:44,872 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 832 flow [2025-03-17 14:30:44,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=832, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2025-03-17 14:30:44,872 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 65 predicate places. [2025-03-17 14:30:44,872 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 832 flow [2025-03-17 14:30:44,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 14:30:44,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:44,872 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2025-03-17 14:30:44,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-17 14:30:44,872 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:44,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:44,873 INFO L85 PathProgramCache]: Analyzing trace with hash -571283585, now seen corresponding path program 2 times [2025-03-17 14:30:44,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:44,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011432327] [2025-03-17 14:30:44,873 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:44,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:44,877 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:30:44,881 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:30:44,881 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:44,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-17 14:30:44,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:44,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011432327] [2025-03-17 14:30:44,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011432327] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:44,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225427164] [2025-03-17 14:30:44,952 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:30:44,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:44,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:44,953 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:44,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:30:44,992 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:30:45,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:30:45,008 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:30:45,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:45,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 14:30:45,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:30:45,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:45,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2025-03-17 14:30:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:30:45,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225427164] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:30:45,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:30:45,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 24 [2025-03-17 14:30:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473590374] [2025-03-17 14:30:45,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:30:45,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 14:30:45,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:45,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 14:30:45,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:30:45,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2025-03-17 14:30:45,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 832 flow. Second operand has 26 states, 26 states have (on average 25.115384615384617) internal successors, (653), 26 states have internal predecessors, (653), 0 states have call successors, (0), 0 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 14:30:45,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:45,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2025-03-17 14:30:45,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:50,335 INFO L124 PetriNetUnfolderBase]: 41580/61994 cut-off events. [2025-03-17 14:30:50,335 INFO L125 PetriNetUnfolderBase]: For 242829/242829 co-relation queries the response was YES. [2025-03-17 14:30:50,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239744 conditions, 61994 events. 41580/61994 cut-off events. For 242829/242829 co-relation queries the response was YES. Maximal size of possible extension queue 1461. Compared 444227 event pairs, 7118 based on Foata normal form. 536/60215 useless extension candidates. Maximal degree in co-relation 216901. Up to 11328 conditions per place. [2025-03-17 14:30:51,050 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 508 selfloop transitions, 55 changer transitions 0/572 dead transitions. [2025-03-17 14:30:51,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 572 transitions, 5482 flow [2025-03-17 14:30:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 14:30:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 14:30:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 716 transitions. [2025-03-17 14:30:51,052 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6067796610169491 [2025-03-17 14:30:51,052 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 832 flow. Second operand 20 states and 716 transitions. [2025-03-17 14:30:51,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 572 transitions, 5482 flow [2025-03-17 14:30:51,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 572 transitions, 5264 flow, removed 83 selfloop flow, removed 8 redundant places. [2025-03-17 14:30:51,858 INFO L231 Difference]: Finished difference. Result has 132 places, 130 transitions, 1177 flow [2025-03-17 14:30:51,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1177, PETRI_PLACES=132, PETRI_TRANSITIONS=130} [2025-03-17 14:30:51,858 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 74 predicate places. [2025-03-17 14:30:51,858 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 130 transitions, 1177 flow [2025-03-17 14:30:51,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 25.115384615384617) internal successors, (653), 26 states have internal predecessors, (653), 0 states have call successors, (0), 0 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 14:30:51,858 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:51,858 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:51,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 14:30:52,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-17 14:30:52,059 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:52,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:52,059 INFO L85 PathProgramCache]: Analyzing trace with hash 748788881, now seen corresponding path program 1 times [2025-03-17 14:30:52,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:52,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543634589] [2025-03-17 14:30:52,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:52,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:52,064 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:30:52,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:30:52,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:52,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:30:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543634589] [2025-03-17 14:30:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543634589] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:30:52,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:30:52,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:30:52,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084405530] [2025-03-17 14:30:52,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:52,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:30:52,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:52,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:30:52,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:30:52,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:30:52,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 130 transitions, 1177 flow. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 14:30:52,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:52,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:30:52,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:56,581 INFO L124 PetriNetUnfolderBase]: 30907/48651 cut-off events. [2025-03-17 14:30:56,581 INFO L125 PetriNetUnfolderBase]: For 251787/251787 co-relation queries the response was YES. [2025-03-17 14:30:56,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193616 conditions, 48651 events. 30907/48651 cut-off events. For 251787/251787 co-relation queries the response was YES. Maximal size of possible extension queue 1512. Compared 376440 event pairs, 11902 based on Foata normal form. 456/46786 useless extension candidates. Maximal degree in co-relation 157912. Up to 28071 conditions per place. [2025-03-17 14:30:56,961 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 261 selfloop transitions, 46 changer transitions 0/323 dead transitions. [2025-03-17 14:30:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 323 transitions, 3648 flow [2025-03-17 14:30:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:30:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:30:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 287 transitions. [2025-03-17 14:30:56,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6949152542372882 [2025-03-17 14:30:56,962 INFO L175 Difference]: Start difference. First operand has 132 places, 130 transitions, 1177 flow. Second operand 7 states and 287 transitions. [2025-03-17 14:30:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 323 transitions, 3648 flow [2025-03-17 14:30:58,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 323 transitions, 3553 flow, removed 42 selfloop flow, removed 5 redundant places. [2025-03-17 14:30:58,115 INFO L231 Difference]: Finished difference. Result has 136 places, 159 transitions, 1723 flow [2025-03-17 14:30:58,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1723, PETRI_PLACES=136, PETRI_TRANSITIONS=159} [2025-03-17 14:30:58,116 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2025-03-17 14:30:58,116 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 159 transitions, 1723 flow [2025-03-17 14:30:58,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 14:30:58,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:30:58,116 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:30:58,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-17 14:30:58,116 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:30:58,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:30:58,117 INFO L85 PathProgramCache]: Analyzing trace with hash -283582295, now seen corresponding path program 1 times [2025-03-17 14:30:58,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:30:58,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553361786] [2025-03-17 14:30:58,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:58,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:30:58,122 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:30:58,125 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:30:58,125 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:58,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:30:58,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:30:58,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553361786] [2025-03-17 14:30:58,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553361786] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545822195] [2025-03-17 14:30:58,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:30:58,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:30:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:30:58,168 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:30:58,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:30:58,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:30:58,226 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:30:58,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:30:58,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:30:58,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:30:58,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:30:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:30:58,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:30:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:30:58,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545822195] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:30:58,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:30:58,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2025-03-17 14:30:58,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990257857] [2025-03-17 14:30:58,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:30:58,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:30:58,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:30:58,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:30:58,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:30:58,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:30:58,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 159 transitions, 1723 flow. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 14:30:58,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:30:58,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:30:58,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:02,110 INFO L124 PetriNetUnfolderBase]: 29909/47771 cut-off events. [2025-03-17 14:31:02,111 INFO L125 PetriNetUnfolderBase]: For 284319/284324 co-relation queries the response was YES. [2025-03-17 14:31:02,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195592 conditions, 47771 events. 29909/47771 cut-off events. For 284319/284324 co-relation queries the response was YES. Maximal size of possible extension queue 1516. Compared 378047 event pairs, 8720 based on Foata normal form. 622/45999 useless extension candidates. Maximal degree in co-relation 161363. Up to 21051 conditions per place. [2025-03-17 14:31:02,484 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 126 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2025-03-17 14:31:02,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2419 flow [2025-03-17 14:31:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:31:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:31:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2025-03-17 14:31:02,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6129943502824858 [2025-03-17 14:31:02,485 INFO L175 Difference]: Start difference. First operand has 136 places, 159 transitions, 1723 flow. Second operand 6 states and 217 transitions. [2025-03-17 14:31:02,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2419 flow [2025-03-17 14:31:04,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 2336 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-17 14:31:04,522 INFO L231 Difference]: Finished difference. Result has 136 places, 156 transitions, 1737 flow [2025-03-17 14:31:04,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1737, PETRI_PLACES=136, PETRI_TRANSITIONS=156} [2025-03-17 14:31:04,522 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2025-03-17 14:31:04,522 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 156 transitions, 1737 flow [2025-03-17 14:31:04,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 14:31:04,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:04,522 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:04,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 14:31:04,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-17 14:31:04,723 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:31:04,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash -389355490, now seen corresponding path program 1 times [2025-03-17 14:31:04,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:04,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892346062] [2025-03-17 14:31:04,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:04,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:04,728 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:31:04,732 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:31:04,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:04,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:31:04,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:04,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892346062] [2025-03-17 14:31:04,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892346062] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:04,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048466486] [2025-03-17 14:31:04,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:04,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:04,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:04,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:04,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:31:04,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:31:04,852 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:31:04,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:04,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:04,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:31:04,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:31:04,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:31:04,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048466486] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:04,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:31:04,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2025-03-17 14:31:04,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913600740] [2025-03-17 14:31:04,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:04,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:31:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:04,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:31:04,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:31:05,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:31:05,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 156 transitions, 1737 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 14:31:05,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:05,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:31:05,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:08,625 INFO L124 PetriNetUnfolderBase]: 26200/45326 cut-off events. [2025-03-17 14:31:08,625 INFO L125 PetriNetUnfolderBase]: For 271519/271543 co-relation queries the response was YES. [2025-03-17 14:31:08,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173429 conditions, 45326 events. 26200/45326 cut-off events. For 271519/271543 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 395691 event pairs, 8912 based on Foata normal form. 0/41482 useless extension candidates. Maximal degree in co-relation 142188. Up to 19382 conditions per place. [2025-03-17 14:31:09,005 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 425 selfloop transitions, 53 changer transitions 0/494 dead transitions. [2025-03-17 14:31:09,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 494 transitions, 6823 flow [2025-03-17 14:31:09,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:31:09,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:31:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 381 transitions. [2025-03-17 14:31:09,006 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6457627118644068 [2025-03-17 14:31:09,006 INFO L175 Difference]: Start difference. First operand has 136 places, 156 transitions, 1737 flow. Second operand 10 states and 381 transitions. [2025-03-17 14:31:09,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 494 transitions, 6823 flow [2025-03-17 14:31:10,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 494 transitions, 6570 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-17 14:31:10,016 INFO L231 Difference]: Finished difference. Result has 143 places, 184 transitions, 2076 flow [2025-03-17 14:31:10,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2076, PETRI_PLACES=143, PETRI_TRANSITIONS=184} [2025-03-17 14:31:10,017 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 85 predicate places. [2025-03-17 14:31:10,017 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 184 transitions, 2076 flow [2025-03-17 14:31:10,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 14:31:10,017 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:10,017 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:10,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 14:31:10,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:10,218 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:31:10,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1352185448, now seen corresponding path program 2 times [2025-03-17 14:31:10,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:10,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319085349] [2025-03-17 14:31:10,218 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:10,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:10,222 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 14:31:10,225 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:31:10,225 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:10,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:31:10,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:10,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319085349] [2025-03-17 14:31:10,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319085349] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:10,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23454530] [2025-03-17 14:31:10,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:10,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:10,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:10,261 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:10,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:31:10,303 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 14:31:10,323 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:31:10,324 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:10,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:10,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:31:10,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:31:10,389 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:31:10,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23454530] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:10,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:31:10,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2025-03-17 14:31:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540511547] [2025-03-17 14:31:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:10,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:31:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:10,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:31:10,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:31:10,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:31:10,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 184 transitions, 2076 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 14:31:10,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:10,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:31:10,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:15,331 INFO L124 PetriNetUnfolderBase]: 37148/61033 cut-off events. [2025-03-17 14:31:15,331 INFO L125 PetriNetUnfolderBase]: For 385013/385029 co-relation queries the response was YES. [2025-03-17 14:31:15,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256472 conditions, 61033 events. 37148/61033 cut-off events. For 385013/385029 co-relation queries the response was YES. Maximal size of possible extension queue 1810. Compared 517556 event pairs, 6042 based on Foata normal form. 92/59890 useless extension candidates. Maximal degree in co-relation 207755. Up to 13626 conditions per place. [2025-03-17 14:31:16,046 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 446 selfloop transitions, 116 changer transitions 0/578 dead transitions. [2025-03-17 14:31:16,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 578 transitions, 7957 flow [2025-03-17 14:31:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:31:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:31:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 374 transitions. [2025-03-17 14:31:16,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6338983050847458 [2025-03-17 14:31:16,047 INFO L175 Difference]: Start difference. First operand has 143 places, 184 transitions, 2076 flow. Second operand 10 states and 374 transitions. [2025-03-17 14:31:16,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 578 transitions, 7957 flow [2025-03-17 14:31:17,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 578 transitions, 7952 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:31:17,620 INFO L231 Difference]: Finished difference. Result has 155 places, 247 transitions, 3273 flow [2025-03-17 14:31:17,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3273, PETRI_PLACES=155, PETRI_TRANSITIONS=247} [2025-03-17 14:31:17,620 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 97 predicate places. [2025-03-17 14:31:17,620 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 247 transitions, 3273 flow [2025-03-17 14:31:17,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 14:31:17,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:17,621 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:17,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-17 14:31:17,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:17,821 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-17 14:31:17,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:17,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1096634206, now seen corresponding path program 3 times [2025-03-17 14:31:17,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:17,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959597673] [2025-03-17 14:31:17,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:31:17,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:17,826 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 4 equivalence classes. [2025-03-17 14:31:17,828 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 26 statements. [2025-03-17 14:31:17,828 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:31:17,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:31:17,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:17,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959597673] [2025-03-17 14:31:17,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959597673] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:17,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313601206] [2025-03-17 14:31:17,865 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:31:17,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:17,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:17,866 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:17,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 14:31:17,917 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 4 equivalence classes. [2025-03-17 14:31:17,932 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 26 statements. [2025-03-17 14:31:17,932 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:31:17,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:17,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:31:17,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:31:17,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:31:18,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313601206] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:18,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:18,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-17 14:31:18,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138754430] [2025-03-17 14:31:18,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:18,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:31:18,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:18,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:31:18,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:31:18,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-03-17 14:31:18,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 247 transitions, 3273 flow. Second operand has 11 states, 11 states have (on average 31.0) internal successors, (341), 11 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 14:31:18,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:18,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-03-17 14:31:18,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand