./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-simple-array-sum.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-simple-array-sum.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 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:32:02,432 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:32:02,494 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:32:02,499 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:32:02,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:32:02,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:32:02,521 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:32:02,521 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:32:02,521 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:32:02,522 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:32:02,522 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:32:02,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:32:02,523 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:32:02,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:32:02,523 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:32:02,523 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:32:02,524 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:32:02,525 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:32:02,525 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:32:02,525 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:32:02,525 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:32:02,525 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:32:02,525 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:32:02,525 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:32:02,526 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:32:02,526 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:32:02,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:32:02,526 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:32:02,526 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:32:02,526 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:32:02,526 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:32:02,526 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 -> 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 [2025-03-17 14:32:02,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:32:02,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:32:02,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:32:02,761 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:32:02,762 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:32:02,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2025-03-17 14:32:03,856 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660f8ac1a/90f2970497b2491db66e34f6f26a2a85/FLAGfefdd9abe [2025-03-17 14:32:04,128 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:32:04,128 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2025-03-17 14:32:04,144 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660f8ac1a/90f2970497b2491db66e34f6f26a2a85/FLAGfefdd9abe [2025-03-17 14:32:04,157 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660f8ac1a/90f2970497b2491db66e34f6f26a2a85 [2025-03-17 14:32:04,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:32:04,160 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:32:04,161 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:32:04,161 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:32:04,163 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:32:04,164 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f9ca31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04, skipping insertion in model container [2025-03-17 14:32:04,165 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,174 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:32:04,302 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 14:32:04,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:32:04,311 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:32:04,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:32:04,343 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:32:04,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04 WrapperNode [2025-03-17 14:32:04,344 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:32:04,345 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:32:04,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:32:04,345 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:32:04,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,355 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,369 INFO L138 Inliner]: procedures = 23, calls = 21, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 105 [2025-03-17 14:32:04,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:32:04,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:32:04,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:32:04,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:32:04,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,382 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,396 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 14:32:04,397 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,397 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,404 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,408 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,409 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,409 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,411 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:32:04,411 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:32:04,411 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:32:04,411 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:32:04,412 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (1/1) ... [2025-03-17 14:32:04,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:32:04,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:04,433 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 14:32:04,438 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 14:32:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:32:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:32:04,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:32:04,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:32:04,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:32:04,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:32:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:32:04,452 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 14:32:04,517 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:32:04,518 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:32:04,765 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:32:04,765 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:32:04,886 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:32:04,886 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:32:04,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:32:04 BoogieIcfgContainer [2025-03-17 14:32:04,886 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:32:04,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:32:04,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:32:04,891 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:32:04,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:32:04" (1/3) ... [2025-03-17 14:32:04,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff340d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:32:04, skipping insertion in model container [2025-03-17 14:32:04,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:04" (2/3) ... [2025-03-17 14:32:04,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff340d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:32:04, skipping insertion in model container [2025-03-17 14:32:04,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:32:04" (3/3) ... [2025-03-17 14:32:04,894 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2025-03-17 14:32:04,904 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:32:04,905 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-simple-array-sum.wvr.c that has 4 procedures, 52 locations, 1 initial locations, 5 loop locations, and 14 error locations. [2025-03-17 14:32:04,905 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:32:04,951 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 14:32:04,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 135 flow [2025-03-17 14:32:05,001 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2025-03-17 14:32:05,004 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:32:05,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 54 events. 6/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 38. Up to 3 conditions per place. [2025-03-17 14:32:05,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 135 flow [2025-03-17 14:32:05,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 124 flow [2025-03-17 14:32:05,018 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:32:05,029 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;@35c1adc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:32:05,029 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2025-03-17 14:32:05,045 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:32:05,046 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:32:05,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:32:05,046 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:05,047 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:32:05,047 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:05,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 436732, now seen corresponding path program 1 times [2025-03-17 14:32:05,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603740420] [2025-03-17 14:32:05,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:05,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:05,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:32:05,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:32:05,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:05,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:05,211 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 14:32:05,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:05,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603740420] [2025-03-17 14:32:05,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603740420] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:05,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:05,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:32:05,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866579234] [2025-03-17 14:32:05,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:05,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:32:05,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:05,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:32:05,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:32:05,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-03-17 14:32:05,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:05,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:05,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-03-17 14:32:05,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:05,667 INFO L124 PetriNetUnfolderBase]: 2574/3856 cut-off events. [2025-03-17 14:32:05,667 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2025-03-17 14:32:05,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7631 conditions, 3856 events. 2574/3856 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21833 event pairs, 2104 based on Foata normal form. 1/2721 useless extension candidates. Maximal degree in co-relation 7075. Up to 3553 conditions per place. [2025-03-17 14:32:05,724 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 38 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2025-03-17 14:32:05,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 196 flow [2025-03-17 14:32:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:32:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:32:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2025-03-17 14:32:05,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47953216374269003 [2025-03-17 14:32:05,735 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 82 transitions. [2025-03-17 14:32:05,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 196 flow [2025-03-17 14:32:05,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:32:05,744 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 108 flow [2025-03-17 14:32:05,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2025-03-17 14:32:05,749 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2025-03-17 14:32:05,749 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 108 flow [2025-03-17 14:32:05,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:05,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:05,750 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:32:05,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:32:05,750 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:05,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:05,751 INFO L85 PathProgramCache]: Analyzing trace with hash 436733, now seen corresponding path program 1 times [2025-03-17 14:32:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:05,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361449396] [2025-03-17 14:32:05,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:05,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:32:05,791 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:32:05,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:05,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:05,985 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 14:32:05,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:05,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361449396] [2025-03-17 14:32:05,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361449396] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:05,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:05,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:32:05,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006403534] [2025-03-17 14:32:05,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:05,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:05,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:05,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:06,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-03-17 14:32:06,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:06,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:06,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-03-17 14:32:06,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:06,322 INFO L124 PetriNetUnfolderBase]: 2575/3859 cut-off events. [2025-03-17 14:32:06,323 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-03-17 14:32:06,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7494 conditions, 3859 events. 2575/3859 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21809 event pairs, 2104 based on Foata normal form. 0/2721 useless extension candidates. Maximal degree in co-relation 7465. Up to 3562 conditions per place. [2025-03-17 14:32:06,345 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 41 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2025-03-17 14:32:06,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 204 flow [2025-03-17 14:32:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-03-17 14:32:06,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2025-03-17 14:32:06,349 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 108 flow. Second operand 4 states and 98 transitions. [2025-03-17 14:32:06,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 204 flow [2025-03-17 14:32:06,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:32:06,352 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 131 flow [2025-03-17 14:32:06,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2025-03-17 14:32:06,353 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2025-03-17 14:32:06,354 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 131 flow [2025-03-17 14:32:06,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:06,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:06,354 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 14:32:06,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:32:06,354 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:06,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash 13539385, now seen corresponding path program 1 times [2025-03-17 14:32:06,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:06,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746739438] [2025-03-17 14:32:06,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:06,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:06,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 14:32:06,377 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 14:32:06,377 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:06,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:06,470 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 14:32:06,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746739438] [2025-03-17 14:32:06,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746739438] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:06,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:06,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868794363] [2025-03-17 14:32:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:06,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:06,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:06,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:06,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-03-17 14:32:06,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:06,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:06,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-03-17 14:32:06,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:06,801 INFO L124 PetriNetUnfolderBase]: 2576/3864 cut-off events. [2025-03-17 14:32:06,801 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-03-17 14:32:06,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 3864 events. 2576/3864 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21830 event pairs, 2104 based on Foata normal form. 0/2727 useless extension candidates. Maximal degree in co-relation 7474. Up to 3561 conditions per place. [2025-03-17 14:32:06,825 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 40 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2025-03-17 14:32:06,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 233 flow [2025-03-17 14:32:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2025-03-17 14:32:06,829 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-03-17 14:32:06,829 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 131 flow. Second operand 4 states and 108 transitions. [2025-03-17 14:32:06,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 233 flow [2025-03-17 14:32:06,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:32:06,832 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 162 flow [2025-03-17 14:32:06,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-03-17 14:32:06,832 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2025-03-17 14:32:06,832 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 162 flow [2025-03-17 14:32:06,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:06,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:06,833 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:32:06,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:32:06,833 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:06,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash 419714306, now seen corresponding path program 1 times [2025-03-17 14:32:06,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:06,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743043461] [2025-03-17 14:32:06,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:06,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:06,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:32:06,857 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:32:06,859 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:06,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:07,076 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 14:32:07,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:07,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743043461] [2025-03-17 14:32:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743043461] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508334051] [2025-03-17 14:32:07,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:07,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:07,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:07,079 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 14:32:07,081 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 14:32:07,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:32:07,133 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:32:07,134 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:07,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:07,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:32:07,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:07,197 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 14:32:07,324 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 14:32:07,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:07,400 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 14:32:07,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508334051] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:07,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:07,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:32:07,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510812651] [2025-03-17 14:32:07,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:07,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:32:07,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:07,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:32:07,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:32:07,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-03-17 14:32:07,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 162 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:07,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:07,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-03-17 14:32:07,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:07,818 INFO L124 PetriNetUnfolderBase]: 2577/3866 cut-off events. [2025-03-17 14:32:07,818 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2025-03-17 14:32:07,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7538 conditions, 3866 events. 2577/3866 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 21876 event pairs, 2104 based on Foata normal form. 0/2732 useless extension candidates. Maximal degree in co-relation 7478. Up to 3564 conditions per place. [2025-03-17 14:32:07,838 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 40 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2025-03-17 14:32:07,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 57 transitions, 273 flow [2025-03-17 14:32:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:32:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:32:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2025-03-17 14:32:07,839 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3355263157894737 [2025-03-17 14:32:07,839 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 162 flow. Second operand 8 states and 153 transitions. [2025-03-17 14:32:07,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 57 transitions, 273 flow [2025-03-17 14:32:07,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 273 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:32:07,841 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 193 flow [2025-03-17 14:32:07,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=8, PETRI_FLOW=193, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2025-03-17 14:32:07,841 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2025-03-17 14:32:07,841 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 193 flow [2025-03-17 14:32:07,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:07,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:07,842 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:32:07,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:32:08,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:08,046 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:08,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash 126242260, now seen corresponding path program 1 times [2025-03-17 14:32:08,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:08,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185441041] [2025-03-17 14:32:08,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:08,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:08,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:32:08,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:32:08,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:08,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:08,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:08,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185441041] [2025-03-17 14:32:08,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185441041] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:08,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413853920] [2025-03-17 14:32:08,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:08,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:08,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:08,218 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 14:32:08,219 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 14:32:08,257 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:32:08,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:32:08,267 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:08,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:08,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:32:08,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:08,281 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 14:32:08,361 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:32:08,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2025-03-17 14:32:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:08,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413853920] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:08,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:32:08,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2025-03-17 14:32:08,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568479254] [2025-03-17 14:32:08,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:08,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:08,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:08,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:32:08,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-03-17 14:32:08,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:08,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:08,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-03-17 14:32:08,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:08,889 INFO L124 PetriNetUnfolderBase]: 5148/7712 cut-off events. [2025-03-17 14:32:08,889 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2025-03-17 14:32:08,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15012 conditions, 7712 events. 5148/7712 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 48755 event pairs, 4208 based on Foata normal form. 1/5467 useless extension candidates. Maximal degree in co-relation 7511. Up to 3562 conditions per place. [2025-03-17 14:32:08,915 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 77 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2025-03-17 14:32:08,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 437 flow [2025-03-17 14:32:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-03-17 14:32:08,916 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2025-03-17 14:32:08,916 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 193 flow. Second operand 5 states and 147 transitions. [2025-03-17 14:32:08,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 437 flow [2025-03-17 14:32:08,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 395 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-03-17 14:32:08,918 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 171 flow [2025-03-17 14:32:08,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2025-03-17 14:32:08,919 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2025-03-17 14:32:08,919 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 171 flow [2025-03-17 14:32:08,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:08,919 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:08,919 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:08,926 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 14:32:09,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:09,123 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:09,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash -372694197, now seen corresponding path program 1 times [2025-03-17 14:32:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:09,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655889479] [2025-03-17 14:32:09,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:09,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:32:09,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:32:09,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:09,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:09,202 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 14:32:09,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:09,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655889479] [2025-03-17 14:32:09,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655889479] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:09,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:09,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:32:09,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17169323] [2025-03-17 14:32:09,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:09,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:09,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:09,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:09,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:32:09,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:09,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:09,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:09,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:09,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:09,658 INFO L124 PetriNetUnfolderBase]: 5351/8147 cut-off events. [2025-03-17 14:32:09,658 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2025-03-17 14:32:09,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15903 conditions, 8147 events. 5351/8147 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 50686 event pairs, 3456 based on Foata normal form. 0/5925 useless extension candidates. Maximal degree in co-relation 8643. Up to 4115 conditions per place. [2025-03-17 14:32:09,691 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 92 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2025-03-17 14:32:09,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 109 transitions, 489 flow [2025-03-17 14:32:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:32:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:32:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2025-03-17 14:32:09,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5380116959064327 [2025-03-17 14:32:09,694 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 171 flow. Second operand 6 states and 184 transitions. [2025-03-17 14:32:09,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 109 transitions, 489 flow [2025-03-17 14:32:09,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 472 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:32:09,696 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 190 flow [2025-03-17 14:32:09,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2025-03-17 14:32:09,697 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2025-03-17 14:32:09,697 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 190 flow [2025-03-17 14:32:09,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:09,698 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:09,698 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:09,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:32:09,698 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:09,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1059740882, now seen corresponding path program 1 times [2025-03-17 14:32:09,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:09,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806992231] [2025-03-17 14:32:09,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:09,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:09,705 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:32:09,710 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:32:09,711 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:09,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:09,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:09,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806992231] [2025-03-17 14:32:09,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806992231] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:09,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094872049] [2025-03-17 14:32:09,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:09,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:09,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:09,797 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 14:32:09,798 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 14:32:09,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:32:09,847 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:32:09,848 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:09,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:09,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:32:09,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:09,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094872049] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:09,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:09,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-03-17 14:32:09,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360569968] [2025-03-17 14:32:09,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:09,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:32:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:09,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:32:09,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:32:10,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-03-17 14:32:10,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 16.53846153846154) internal successors, (215), 13 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:10,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:10,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-03-17 14:32:10,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:10,603 INFO L124 PetriNetUnfolderBase]: 6287/9471 cut-off events. [2025-03-17 14:32:10,603 INFO L125 PetriNetUnfolderBase]: For 1687/1888 co-relation queries the response was YES. [2025-03-17 14:32:10,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19913 conditions, 9471 events. 6287/9471 cut-off events. For 1687/1888 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 59900 event pairs, 5244 based on Foata normal form. 1/6809 useless extension candidates. Maximal degree in co-relation 7812. Up to 5283 conditions per place. [2025-03-17 14:32:10,638 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 74 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2025-03-17 14:32:10,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 491 flow [2025-03-17 14:32:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:32:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:32:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2025-03-17 14:32:10,641 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4405458089668616 [2025-03-17 14:32:10,641 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 190 flow. Second operand 9 states and 226 transitions. [2025-03-17 14:32:10,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 491 flow [2025-03-17 14:32:10,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 474 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:10,645 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 258 flow [2025-03-17 14:32:10,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=258, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2025-03-17 14:32:10,646 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2025-03-17 14:32:10,646 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 258 flow [2025-03-17 14:32:10,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.53846153846154) internal successors, (215), 13 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:10,646 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:10,646 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:10,655 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 14:32:10,847 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 14:32:10,847 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:10,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1718320031, now seen corresponding path program 1 times [2025-03-17 14:32:10,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:10,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730887327] [2025-03-17 14:32:10,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:10,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:10,851 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:32:10,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:32:10,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:10,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:10,913 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 14:32:10,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:10,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730887327] [2025-03-17 14:32:10,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730887327] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:10,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:10,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:32:10,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758936094] [2025-03-17 14:32:10,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:10,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:10,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:10,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:10,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:32:10,927 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:10,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:10,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:10,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:10,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:11,338 INFO L124 PetriNetUnfolderBase]: 5983/9001 cut-off events. [2025-03-17 14:32:11,338 INFO L125 PetriNetUnfolderBase]: For 1179/1531 co-relation queries the response was YES. [2025-03-17 14:32:11,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18458 conditions, 9001 events. 5983/9001 cut-off events. For 1179/1531 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 54249 event pairs, 4818 based on Foata normal form. 0/6344 useless extension candidates. Maximal degree in co-relation 8586. Up to 7819 conditions per place. [2025-03-17 14:32:11,376 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 79 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2025-03-17 14:32:11,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 528 flow [2025-03-17 14:32:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:32:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:32:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2025-03-17 14:32:11,377 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48830409356725146 [2025-03-17 14:32:11,377 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 258 flow. Second operand 6 states and 167 transitions. [2025-03-17 14:32:11,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 528 flow [2025-03-17 14:32:11,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 496 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:11,381 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 267 flow [2025-03-17 14:32:11,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2025-03-17 14:32:11,382 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2025-03-17 14:32:11,382 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 267 flow [2025-03-17 14:32:11,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:11,382 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:11,382 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2025-03-17 14:32:11,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:32:11,382 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:11,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:11,383 INFO L85 PathProgramCache]: Analyzing trace with hash 294112493, now seen corresponding path program 2 times [2025-03-17 14:32:11,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:11,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429515059] [2025-03-17 14:32:11,383 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:11,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:11,388 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-03-17 14:32:11,404 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:32:11,404 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:11,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:11,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:11,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429515059] [2025-03-17 14:32:11,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429515059] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:11,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843899024] [2025-03-17 14:32:11,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:11,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:11,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:11,581 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 14:32:11,582 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 14:32:11,613 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-03-17 14:32:11,631 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:32:11,631 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:11,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:11,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 14:32:11,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:11,665 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 14:32:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:11,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:11,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843899024] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:11,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:11,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-03-17 14:32:11,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110379810] [2025-03-17 14:32:11,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:11,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:32:11,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:11,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:32:11,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:32:11,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-03-17 14:32:11,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 267 flow. Second operand has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:11,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:11,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-03-17 14:32:11,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:12,503 INFO L124 PetriNetUnfolderBase]: 5329/8079 cut-off events. [2025-03-17 14:32:12,504 INFO L125 PetriNetUnfolderBase]: For 1629/1947 co-relation queries the response was YES. [2025-03-17 14:32:12,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17574 conditions, 8079 events. 5329/8079 cut-off events. For 1629/1947 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 51605 event pairs, 4488 based on Foata normal form. 2/5983 useless extension candidates. Maximal degree in co-relation 8026. Up to 7590 conditions per place. [2025-03-17 14:32:12,541 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 38 selfloop transitions, 22 changer transitions 0/67 dead transitions. [2025-03-17 14:32:12,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 67 transitions, 391 flow [2025-03-17 14:32:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:32:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:32:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2025-03-17 14:32:12,543 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3458646616541353 [2025-03-17 14:32:12,543 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 267 flow. Second operand 7 states and 138 transitions. [2025-03-17 14:32:12,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 67 transitions, 391 flow [2025-03-17 14:32:12,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 67 transitions, 368 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:32:12,549 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 292 flow [2025-03-17 14:32:12,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2025-03-17 14:32:12,550 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2025-03-17 14:32:12,550 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 292 flow [2025-03-17 14:32:12,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:12,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:12,551 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:12,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:32:12,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:12,752 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:12,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:12,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1561564142, now seen corresponding path program 1 times [2025-03-17 14:32:12,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:12,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094027121] [2025-03-17 14:32:12,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:12,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:12,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:32:12,763 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:32:12,764 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:12,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:12,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:12,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094027121] [2025-03-17 14:32:12,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094027121] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:12,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116832927] [2025-03-17 14:32:12,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:12,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:12,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:12,953 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 14:32:12,955 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 14:32:12,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:32:13,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:32:13,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:13,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:13,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 14:32:13,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:13,018 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 14:32:13,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:32:13,085 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:32:13,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2025-03-17 14:32:13,106 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:32:13,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:32:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:13,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:13,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116832927] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:13,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:32:13,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2025-03-17 14:32:13,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789218483] [2025-03-17 14:32:13,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:13,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:32:13,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:13,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:32:13,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:32:13,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-03-17 14:32:13,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:13,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:13,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-03-17 14:32:13,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:14,194 INFO L124 PetriNetUnfolderBase]: 7337/11051 cut-off events. [2025-03-17 14:32:14,194 INFO L125 PetriNetUnfolderBase]: For 1919/2475 co-relation queries the response was YES. [2025-03-17 14:32:14,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23743 conditions, 11051 events. 7337/11051 cut-off events. For 1919/2475 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 71098 event pairs, 3776 based on Foata normal form. 0/8032 useless extension candidates. Maximal degree in co-relation 11101. Up to 5997 conditions per place. [2025-03-17 14:32:14,232 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 86 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2025-03-17 14:32:14,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 109 transitions, 594 flow [2025-03-17 14:32:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:32:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:32:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2025-03-17 14:32:14,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2025-03-17 14:32:14,233 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 292 flow. Second operand 7 states and 195 transitions. [2025-03-17 14:32:14,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 109 transitions, 594 flow [2025-03-17 14:32:14,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 587 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-17 14:32:14,238 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 340 flow [2025-03-17 14:32:14,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=340, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2025-03-17 14:32:14,239 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2025-03-17 14:32:14,239 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 340 flow [2025-03-17 14:32:14,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:14,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:14,239 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:14,244 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 14:32:14,439 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,SelfDestructingSolverStorable9 [2025-03-17 14:32:14,439 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:14,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1561564143, now seen corresponding path program 1 times [2025-03-17 14:32:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:14,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236270934] [2025-03-17 14:32:14,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:14,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:14,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:32:14,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:32:14,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:14,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:14,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:14,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236270934] [2025-03-17 14:32:14,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236270934] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:14,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:14,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:14,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122676855] [2025-03-17 14:32:14,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:14,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:14,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:14,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:14,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:32:14,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-03-17 14:32:14,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 340 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:14,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:14,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-03-17 14:32:14,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:14,832 INFO L124 PetriNetUnfolderBase]: 5125/7757 cut-off events. [2025-03-17 14:32:14,832 INFO L125 PetriNetUnfolderBase]: For 7077/7567 co-relation queries the response was YES. [2025-03-17 14:32:14,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20378 conditions, 7757 events. 5125/7757 cut-off events. For 7077/7567 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 46997 event pairs, 4050 based on Foata normal form. 580/7146 useless extension candidates. Maximal degree in co-relation 10899. Up to 7180 conditions per place. [2025-03-17 14:32:14,861 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 50 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2025-03-17 14:32:14,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 456 flow [2025-03-17 14:32:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2025-03-17 14:32:14,863 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-03-17 14:32:14,863 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 340 flow. Second operand 5 states and 105 transitions. [2025-03-17 14:32:14,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 456 flow [2025-03-17 14:32:14,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 433 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-17 14:32:14,868 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 333 flow [2025-03-17 14:32:14,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=76, 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=5, PETRI_FLOW=333, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2025-03-17 14:32:14,869 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2025-03-17 14:32:14,869 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 333 flow [2025-03-17 14:32:14,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:14,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:14,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:14,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 14:32:14,869 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:14,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:14,870 INFO L85 PathProgramCache]: Analyzing trace with hash -222688739, now seen corresponding path program 1 times [2025-03-17 14:32:14,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:14,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814221544] [2025-03-17 14:32:14,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:14,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:14,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:32:14,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:32:14,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:14,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:14,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814221544] [2025-03-17 14:32:14,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814221544] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:14,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851576990] [2025-03-17 14:32:14,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:14,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:14,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:14,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:14,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:14,917 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:14,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:14,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:14,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:14,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:15,372 INFO L124 PetriNetUnfolderBase]: 7019/10459 cut-off events. [2025-03-17 14:32:15,372 INFO L125 PetriNetUnfolderBase]: For 8921/9867 co-relation queries the response was YES. [2025-03-17 14:32:15,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26658 conditions, 10459 events. 7019/10459 cut-off events. For 8921/9867 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 59385 event pairs, 1562 based on Foata normal form. 232/9267 useless extension candidates. Maximal degree in co-relation 13651. Up to 6763 conditions per place. [2025-03-17 14:32:15,410 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 102 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2025-03-17 14:32:15,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 713 flow [2025-03-17 14:32:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2025-03-17 14:32:15,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-17 14:32:15,411 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 333 flow. Second operand 4 states and 133 transitions. [2025-03-17 14:32:15,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 713 flow [2025-03-17 14:32:15,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 699 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:15,415 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 344 flow [2025-03-17 14:32:15,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2025-03-17 14:32:15,416 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2025-03-17 14:32:15,416 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 344 flow [2025-03-17 14:32:15,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:15,416 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:15,416 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:15,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 14:32:15,416 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:15,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:15,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1761036439, now seen corresponding path program 1 times [2025-03-17 14:32:15,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:15,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244565661] [2025-03-17 14:32:15,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:15,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:15,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:32:15,424 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:32:15,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:15,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:15,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:15,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244565661] [2025-03-17 14:32:15,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244565661] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:15,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122457878] [2025-03-17 14:32:15,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:15,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:15,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:15,549 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 14:32:15,551 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 14:32:15,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:32:15,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:32:15,601 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:15,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:15,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 14:32:15,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:15,608 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 14:32:15,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:32:15,646 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:32:15,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:32:15,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2025-03-17 14:32:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:15,821 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:15,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122457878] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:15,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:32:15,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2025-03-17 14:32:15,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702692529] [2025-03-17 14:32:15,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:15,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:32:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:15,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:32:15,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:32:16,032 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-03-17 14:32:16,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:16,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:16,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-03-17 14:32:16,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:16,620 INFO L124 PetriNetUnfolderBase]: 6077/9241 cut-off events. [2025-03-17 14:32:16,620 INFO L125 PetriNetUnfolderBase]: For 8947/9725 co-relation queries the response was YES. [2025-03-17 14:32:16,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24819 conditions, 9241 events. 6077/9241 cut-off events. For 8947/9725 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 54955 event pairs, 1786 based on Foata normal form. 0/7984 useless extension candidates. Maximal degree in co-relation 12748. Up to 5432 conditions per place. [2025-03-17 14:32:16,667 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 80 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2025-03-17 14:32:16,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 103 transitions, 648 flow [2025-03-17 14:32:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:32:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:32:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2025-03-17 14:32:16,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45363408521303256 [2025-03-17 14:32:16,668 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 344 flow. Second operand 7 states and 181 transitions. [2025-03-17 14:32:16,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 103 transitions, 648 flow [2025-03-17 14:32:16,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 648 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:32:16,675 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 399 flow [2025-03-17 14:32:16,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=399, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2025-03-17 14:32:16,675 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2025-03-17 14:32:16,676 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 399 flow [2025-03-17 14:32:16,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:16,676 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:16,676 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:16,681 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 14:32:16,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:16,876 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:16,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1766118694, now seen corresponding path program 1 times [2025-03-17 14:32:16,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:16,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205943749] [2025-03-17 14:32:16,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:16,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:16,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:32:16,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:32:16,884 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:16,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:16,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205943749] [2025-03-17 14:32:16,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205943749] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221564759] [2025-03-17 14:32:16,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:16,942 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 14:32:16,944 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 14:32:16,980 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:32:16,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:32:16,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:16,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:16,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:32:16,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:17,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:17,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221564759] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:17,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:17,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-17 14:32:17,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98040877] [2025-03-17 14:32:17,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:17,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:32:17,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:17,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:32:17,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:32:17,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:17,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 399 flow. Second operand has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:17,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:17,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:17,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:17,812 INFO L124 PetriNetUnfolderBase]: 6763/10142 cut-off events. [2025-03-17 14:32:17,812 INFO L125 PetriNetUnfolderBase]: For 9381/9542 co-relation queries the response was YES. [2025-03-17 14:32:17,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28959 conditions, 10142 events. 6763/10142 cut-off events. For 9381/9542 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 58705 event pairs, 3821 based on Foata normal form. 186/9106 useless extension candidates. Maximal degree in co-relation 16337. Up to 5392 conditions per place. [2025-03-17 14:32:17,848 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 134 selfloop transitions, 24 changer transitions 0/164 dead transitions. [2025-03-17 14:32:17,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 164 transitions, 1069 flow [2025-03-17 14:32:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:32:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:32:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2025-03-17 14:32:17,849 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-03-17 14:32:17,849 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 399 flow. Second operand 10 states and 270 transitions. [2025-03-17 14:32:17,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 164 transitions, 1069 flow [2025-03-17 14:32:17,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 164 transitions, 1033 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-03-17 14:32:17,857 INFO L231 Difference]: Finished difference. Result has 97 places, 76 transitions, 472 flow [2025-03-17 14:32:17,857 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=472, PETRI_PLACES=97, PETRI_TRANSITIONS=76} [2025-03-17 14:32:17,858 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2025-03-17 14:32:17,858 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 76 transitions, 472 flow [2025-03-17 14:32:17,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:17,858 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:17,858 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:17,863 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 14:32:18,058 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 14:32:18,058 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:18,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:18,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1242445703, now seen corresponding path program 1 times [2025-03-17 14:32:18,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:18,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725711794] [2025-03-17 14:32:18,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:18,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:18,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:32:18,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:32:18,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:18,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:18,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:18,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725711794] [2025-03-17 14:32:18,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725711794] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:18,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:18,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:18,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541337178] [2025-03-17 14:32:18,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:18,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:18,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:18,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:18,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:18,101 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-03-17 14:32:18,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 76 transitions, 472 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:18,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:18,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-03-17 14:32:18,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:18,428 INFO L124 PetriNetUnfolderBase]: 4311/6736 cut-off events. [2025-03-17 14:32:18,428 INFO L125 PetriNetUnfolderBase]: For 13911/14416 co-relation queries the response was YES. [2025-03-17 14:32:18,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21616 conditions, 6736 events. 4311/6736 cut-off events. For 13911/14416 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 38309 event pairs, 3330 based on Foata normal form. 0/6274 useless extension candidates. Maximal degree in co-relation 11319. Up to 6152 conditions per place. [2025-03-17 14:32:18,466 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 60 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2025-03-17 14:32:18,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 74 transitions, 602 flow [2025-03-17 14:32:18,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2025-03-17 14:32:18,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2025-03-17 14:32:18,467 INFO L175 Difference]: Start difference. First operand has 97 places, 76 transitions, 472 flow. Second operand 4 states and 90 transitions. [2025-03-17 14:32:18,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 74 transitions, 602 flow [2025-03-17 14:32:18,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 74 transitions, 567 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-03-17 14:32:18,478 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 447 flow [2025-03-17 14:32:18,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=447, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2025-03-17 14:32:18,479 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2025-03-17 14:32:18,479 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 447 flow [2025-03-17 14:32:18,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:18,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:18,479 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:18,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 14:32:18,479 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:18,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1242445704, now seen corresponding path program 1 times [2025-03-17 14:32:18,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:18,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452148808] [2025-03-17 14:32:18,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:18,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:18,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:32:18,487 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:32:18,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:18,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:18,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:18,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452148808] [2025-03-17 14:32:18,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452148808] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:18,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407477223] [2025-03-17 14:32:18,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:18,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:18,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:18,626 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 14:32:18,627 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 14:32:18,665 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:32:18,678 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:32:18,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:18,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:18,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:32:18,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:18,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:18,777 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 22 treesize of output 18 [2025-03-17 14:32:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:18,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407477223] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:18,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:18,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-03-17 14:32:18,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514751237] [2025-03-17 14:32:18,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:18,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:32:18,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:18,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:32:18,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:32:18,844 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-03-17 14:32:18,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 447 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:18,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:18,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-03-17 14:32:18,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:19,480 INFO L124 PetriNetUnfolderBase]: 4534/7085 cut-off events. [2025-03-17 14:32:19,480 INFO L125 PetriNetUnfolderBase]: For 13406/13951 co-relation queries the response was YES. [2025-03-17 14:32:19,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22445 conditions, 7085 events. 4534/7085 cut-off events. For 13406/13951 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 41356 event pairs, 1668 based on Foata normal form. 0/6709 useless extension candidates. Maximal degree in co-relation 11890. Up to 3653 conditions per place. [2025-03-17 14:32:19,522 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 107 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2025-03-17 14:32:19,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 963 flow [2025-03-17 14:32:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:32:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:32:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2025-03-17 14:32:19,523 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49874686716791977 [2025-03-17 14:32:19,523 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 447 flow. Second operand 7 states and 199 transitions. [2025-03-17 14:32:19,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 963 flow [2025-03-17 14:32:19,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 955 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:32:19,539 INFO L231 Difference]: Finished difference. Result has 98 places, 76 transitions, 496 flow [2025-03-17 14:32:19,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=98, PETRI_TRANSITIONS=76} [2025-03-17 14:32:19,540 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2025-03-17 14:32:19,540 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 76 transitions, 496 flow [2025-03-17 14:32:19,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:19,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:19,540 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:19,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 14:32:19,741 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,SelfDestructingSolverStorable15 [2025-03-17 14:32:19,741 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:19,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2105311475, now seen corresponding path program 2 times [2025-03-17 14:32:19,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:19,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846935146] [2025-03-17 14:32:19,742 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:19,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:19,747 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 14:32:19,753 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:32:19,753 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:19,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:19,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:19,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846935146] [2025-03-17 14:32:19,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846935146] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:19,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052711039] [2025-03-17 14:32:19,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:19,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:19,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:19,935 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 14:32:19,936 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 14:32:19,982 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 14:32:19,996 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:32:19,996 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:19,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:19,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 14:32:19,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:20,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:32:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:32:20,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:32:20,059 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:32:20,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:32:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:20,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:20,241 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 52 treesize of output 48 [2025-03-17 14:32:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:20,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052711039] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:20,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:20,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2025-03-17 14:32:20,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327185015] [2025-03-17 14:32:20,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:20,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 14:32:20,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:20,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 14:32:20,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:32:20,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 57 [2025-03-17 14:32:20,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 76 transitions, 496 flow. Second operand has 21 states, 21 states have (on average 14.285714285714286) internal successors, (300), 21 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:20,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:20,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 57 [2025-03-17 14:32:20,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:22,432 INFO L124 PetriNetUnfolderBase]: 9256/13555 cut-off events. [2025-03-17 14:32:22,433 INFO L125 PetriNetUnfolderBase]: For 23098/23478 co-relation queries the response was YES. [2025-03-17 14:32:22,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47413 conditions, 13555 events. 9256/13555 cut-off events. For 23098/23478 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 80533 event pairs, 1892 based on Foata normal form. 308/13448 useless extension candidates. Maximal degree in co-relation 33817. Up to 3149 conditions per place. [2025-03-17 14:32:22,494 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 267 selfloop transitions, 36 changer transitions 0/309 dead transitions. [2025-03-17 14:32:22,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 309 transitions, 2216 flow [2025-03-17 14:32:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 14:32:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 14:32:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 453 transitions. [2025-03-17 14:32:22,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4182825484764543 [2025-03-17 14:32:22,496 INFO L175 Difference]: Start difference. First operand has 98 places, 76 transitions, 496 flow. Second operand 19 states and 453 transitions. [2025-03-17 14:32:22,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 309 transitions, 2216 flow [2025-03-17 14:32:22,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 309 transitions, 2150 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:32:22,521 INFO L231 Difference]: Finished difference. Result has 113 places, 86 transitions, 643 flow [2025-03-17 14:32:22,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=643, PETRI_PLACES=113, PETRI_TRANSITIONS=86} [2025-03-17 14:32:22,522 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2025-03-17 14:32:22,522 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 86 transitions, 643 flow [2025-03-17 14:32:22,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.285714285714286) internal successors, (300), 21 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:22,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:22,522 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:22,528 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 14:32:22,722 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 14:32:22,723 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:22,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1412340305, now seen corresponding path program 1 times [2025-03-17 14:32:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214127276] [2025-03-17 14:32:22,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:22,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:32:22,731 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:32:22,731 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:22,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:22,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214127276] [2025-03-17 14:32:22,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214127276] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667238279] [2025-03-17 14:32:22,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:22,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:22,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:22,789 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 14:32:22,790 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 14:32:22,831 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:32:22,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:32:22,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:22,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:22,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:32:22,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:22,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:22,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667238279] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:22,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:22,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-17 14:32:22,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416764850] [2025-03-17 14:32:22,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:22,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:32:22,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:22,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:32:22,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:32:22,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:22,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 86 transitions, 643 flow. Second operand has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:22,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:22,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:22,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:23,724 INFO L124 PetriNetUnfolderBase]: 6164/9339 cut-off events. [2025-03-17 14:32:23,724 INFO L125 PetriNetUnfolderBase]: For 32319/33199 co-relation queries the response was YES. [2025-03-17 14:32:23,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35145 conditions, 9339 events. 6164/9339 cut-off events. For 32319/33199 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 51946 event pairs, 3469 based on Foata normal form. 152/9252 useless extension candidates. Maximal degree in co-relation 26995. Up to 5278 conditions per place. [2025-03-17 14:32:23,763 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 125 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2025-03-17 14:32:23,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 157 transitions, 1350 flow [2025-03-17 14:32:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:32:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:32:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2025-03-17 14:32:23,764 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4368421052631579 [2025-03-17 14:32:23,764 INFO L175 Difference]: Start difference. First operand has 113 places, 86 transitions, 643 flow. Second operand 10 states and 249 transitions. [2025-03-17 14:32:23,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 157 transitions, 1350 flow [2025-03-17 14:32:23,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 157 transitions, 1295 flow, removed 8 selfloop flow, removed 10 redundant places. [2025-03-17 14:32:23,779 INFO L231 Difference]: Finished difference. Result has 115 places, 90 transitions, 698 flow [2025-03-17 14:32:23,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=698, PETRI_PLACES=115, PETRI_TRANSITIONS=90} [2025-03-17 14:32:23,780 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2025-03-17 14:32:23,780 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 90 transitions, 698 flow [2025-03-17 14:32:23,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:23,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:23,780 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:23,786 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 14:32:23,982 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 14:32:23,982 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:23,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash 408460222, now seen corresponding path program 1 times [2025-03-17 14:32:23,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:23,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526477968] [2025-03-17 14:32:23,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:23,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:23,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:32:23,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:32:23,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:23,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:24,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526477968] [2025-03-17 14:32:24,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526477968] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:24,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:24,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:24,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094110857] [2025-03-17 14:32:24,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:24,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:24,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:24,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:24,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:24,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-03-17 14:32:24,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 90 transitions, 698 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:24,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:24,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-03-17 14:32:24,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:24,603 INFO L124 PetriNetUnfolderBase]: 5648/8823 cut-off events. [2025-03-17 14:32:24,603 INFO L125 PetriNetUnfolderBase]: For 33692/34292 co-relation queries the response was YES. [2025-03-17 14:32:24,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34039 conditions, 8823 events. 5648/8823 cut-off events. For 33692/34292 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 50817 event pairs, 4402 based on Foata normal form. 1/8545 useless extension candidates. Maximal degree in co-relation 24639. Up to 7881 conditions per place. [2025-03-17 14:32:24,739 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 77 selfloop transitions, 2 changer transitions 17/105 dead transitions. [2025-03-17 14:32:24,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 105 transitions, 964 flow [2025-03-17 14:32:24,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2025-03-17 14:32:24,740 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5043859649122807 [2025-03-17 14:32:24,740 INFO L175 Difference]: Start difference. First operand has 115 places, 90 transitions, 698 flow. Second operand 4 states and 115 transitions. [2025-03-17 14:32:24,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 105 transitions, 964 flow [2025-03-17 14:32:24,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 105 transitions, 929 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-03-17 14:32:24,759 INFO L231 Difference]: Finished difference. Result has 113 places, 88 transitions, 649 flow [2025-03-17 14:32:24,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=649, PETRI_PLACES=113, PETRI_TRANSITIONS=88} [2025-03-17 14:32:24,759 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2025-03-17 14:32:24,760 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 88 transitions, 649 flow [2025-03-17 14:32:24,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:24,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:24,760 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:24,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 14:32:24,760 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:24,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash -59224447, now seen corresponding path program 1 times [2025-03-17 14:32:24,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:24,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999603338] [2025-03-17 14:32:24,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:24,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:24,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:32:24,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:32:24,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:24,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 14:32:24,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:24,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999603338] [2025-03-17 14:32:24,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999603338] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:24,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:24,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:32:24,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670258714] [2025-03-17 14:32:24,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:24,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:24,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:24,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:24,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:32:24,812 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:24,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 88 transitions, 649 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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 14:32:24,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:24,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:24,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:25,714 INFO L124 PetriNetUnfolderBase]: 8114/12621 cut-off events. [2025-03-17 14:32:25,714 INFO L125 PetriNetUnfolderBase]: For 47132/48148 co-relation queries the response was YES. [2025-03-17 14:32:25,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48247 conditions, 12621 events. 8114/12621 cut-off events. For 47132/48148 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 77276 event pairs, 2599 based on Foata normal form. 266/12634 useless extension candidates. Maximal degree in co-relation 48208. Up to 6424 conditions per place. [2025-03-17 14:32:25,790 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 182 selfloop transitions, 20 changer transitions 0/210 dead transitions. [2025-03-17 14:32:25,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 210 transitions, 2032 flow [2025-03-17 14:32:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:32:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:32:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2025-03-17 14:32:25,791 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5350877192982456 [2025-03-17 14:32:25,791 INFO L175 Difference]: Start difference. First operand has 113 places, 88 transitions, 649 flow. Second operand 6 states and 183 transitions. [2025-03-17 14:32:25,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 210 transitions, 2032 flow [2025-03-17 14:32:25,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 2022 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-03-17 14:32:25,815 INFO L231 Difference]: Finished difference. Result has 116 places, 100 transitions, 827 flow [2025-03-17 14:32:25,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=827, PETRI_PLACES=116, PETRI_TRANSITIONS=100} [2025-03-17 14:32:25,815 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2025-03-17 14:32:25,815 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 100 transitions, 827 flow [2025-03-17 14:32:25,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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 14:32:25,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:25,816 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:25,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-17 14:32:25,816 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:25,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash -908797263, now seen corresponding path program 2 times [2025-03-17 14:32:25,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:25,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002072472] [2025-03-17 14:32:25,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:25,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:25,823 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:32:25,827 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 22 statements. [2025-03-17 14:32:25,828 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:32:25,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 14:32:25,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:25,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002072472] [2025-03-17 14:32:25,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002072472] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:25,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:25,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:32:25,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480584431] [2025-03-17 14:32:25,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:25,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:25,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:25,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:25,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:32:25,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:25,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 100 transitions, 827 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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 14:32:25,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:25,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:25,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:27,184 INFO L124 PetriNetUnfolderBase]: 11470/17576 cut-off events. [2025-03-17 14:32:27,184 INFO L125 PetriNetUnfolderBase]: For 77279/78833 co-relation queries the response was YES. [2025-03-17 14:32:27,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69716 conditions, 17576 events. 11470/17576 cut-off events. For 77279/78833 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 108715 event pairs, 4319 based on Foata normal form. 304/17454 useless extension candidates. Maximal degree in co-relation 41262. Up to 7116 conditions per place. [2025-03-17 14:32:27,486 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 202 selfloop transitions, 16 changer transitions 0/226 dead transitions. [2025-03-17 14:32:27,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 226 transitions, 2311 flow [2025-03-17 14:32:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:32:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:32:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2025-03-17 14:32:27,487 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2025-03-17 14:32:27,487 INFO L175 Difference]: Start difference. First operand has 116 places, 100 transitions, 827 flow. Second operand 6 states and 180 transitions. [2025-03-17 14:32:27,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 226 transitions, 2311 flow [2025-03-17 14:32:27,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 226 transitions, 2287 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 14:32:27,533 INFO L231 Difference]: Finished difference. Result has 124 places, 110 transitions, 1013 flow [2025-03-17 14:32:27,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1013, PETRI_PLACES=124, PETRI_TRANSITIONS=110} [2025-03-17 14:32:27,533 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2025-03-17 14:32:27,533 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 110 transitions, 1013 flow [2025-03-17 14:32:27,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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 14:32:27,533 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:27,534 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:27,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-17 14:32:27,534 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:27,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash -465213775, now seen corresponding path program 1 times [2025-03-17 14:32:27,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:27,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534563568] [2025-03-17 14:32:27,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:27,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:27,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:32:27,546 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:32:27,546 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:27,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:27,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534563568] [2025-03-17 14:32:27,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534563568] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230440775] [2025-03-17 14:32:27,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:27,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:27,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:27,595 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 14:32:27,596 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 14:32:27,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:32:27,653 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:32:27,653 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:27,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:27,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:32:27,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:27,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:27,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230440775] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:27,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:32:27,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-03-17 14:32:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537864116] [2025-03-17 14:32:27,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:27,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:27,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:27,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:32:27,717 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-03-17 14:32:27,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 110 transitions, 1013 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:27,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:27,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-03-17 14:32:27,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:28,842 INFO L124 PetriNetUnfolderBase]: 10318/16042 cut-off events. [2025-03-17 14:32:28,843 INFO L125 PetriNetUnfolderBase]: For 79414/80829 co-relation queries the response was YES. [2025-03-17 14:32:28,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64983 conditions, 16042 events. 10318/16042 cut-off events. For 79414/80829 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 100907 event pairs, 7668 based on Foata normal form. 2/15573 useless extension candidates. Maximal degree in co-relation 50288. Up to 14488 conditions per place. [2025-03-17 14:32:28,936 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 75 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2025-03-17 14:32:28,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1050 flow [2025-03-17 14:32:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2025-03-17 14:32:28,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39649122807017545 [2025-03-17 14:32:28,937 INFO L175 Difference]: Start difference. First operand has 124 places, 110 transitions, 1013 flow. Second operand 5 states and 113 transitions. [2025-03-17 14:32:28,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1050 flow [2025-03-17 14:32:29,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 980 flow, removed 17 selfloop flow, removed 5 redundant places. [2025-03-17 14:32:29,003 INFO L231 Difference]: Finished difference. Result has 119 places, 99 transitions, 830 flow [2025-03-17 14:32:29,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=830, PETRI_PLACES=119, PETRI_TRANSITIONS=99} [2025-03-17 14:32:29,003 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2025-03-17 14:32:29,003 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 99 transitions, 830 flow [2025-03-17 14:32:29,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:29,003 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:29,003 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:29,009 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 14:32:29,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-17 14:32:29,204 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:29,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash 54555665, now seen corresponding path program 3 times [2025-03-17 14:32:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:29,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116296174] [2025-03-17 14:32:29,205 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:29,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:29,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-03-17 14:32:29,212 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 22 statements. [2025-03-17 14:32:29,212 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:32:29,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 14:32:29,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:29,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116296174] [2025-03-17 14:32:29,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116296174] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:29,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:29,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:32:29,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876247254] [2025-03-17 14:32:29,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:29,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:29,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:29,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:29,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:32:29,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:29,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 99 transitions, 830 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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 14:32:29,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:29,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:29,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:30,299 INFO L124 PetriNetUnfolderBase]: 10194/15596 cut-off events. [2025-03-17 14:32:30,299 INFO L125 PetriNetUnfolderBase]: For 53317/53956 co-relation queries the response was YES. [2025-03-17 14:32:30,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57759 conditions, 15596 events. 10194/15596 cut-off events. For 53317/53956 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 92047 event pairs, 2051 based on Foata normal form. 266/15616 useless extension candidates. Maximal degree in co-relation 41818. Up to 6263 conditions per place. [2025-03-17 14:32:30,392 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 157 selfloop transitions, 27 changer transitions 0/192 dead transitions. [2025-03-17 14:32:30,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 192 transitions, 1833 flow [2025-03-17 14:32:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:32:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:32:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2025-03-17 14:32:30,393 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5292397660818714 [2025-03-17 14:32:30,393 INFO L175 Difference]: Start difference. First operand has 119 places, 99 transitions, 830 flow. Second operand 6 states and 181 transitions. [2025-03-17 14:32:30,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 192 transitions, 1833 flow [2025-03-17 14:32:30,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 192 transitions, 1792 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-03-17 14:32:30,446 INFO L231 Difference]: Finished difference. Result has 122 places, 101 transitions, 908 flow [2025-03-17 14:32:30,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=908, PETRI_PLACES=122, PETRI_TRANSITIONS=101} [2025-03-17 14:32:30,446 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2025-03-17 14:32:30,446 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 101 transitions, 908 flow [2025-03-17 14:32:30,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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 14:32:30,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:30,447 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:30,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-17 14:32:30,447 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:30,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:30,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1054935242, now seen corresponding path program 2 times [2025-03-17 14:32:30,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:30,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700190395] [2025-03-17 14:32:30,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:30,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:30,452 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-17 14:32:30,462 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:32:30,463 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:30,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:30,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:30,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700190395] [2025-03-17 14:32:30,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700190395] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:30,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787381324] [2025-03-17 14:32:30,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:30,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:30,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:30,614 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 14:32:30,615 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 14:32:30,697 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-17 14:32:30,714 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:32:30,714 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:30,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:30,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 14:32:30,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:30,721 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 14:32:30,777 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2025-03-17 14:32:30,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2025-03-17 14:32:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:31,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:31,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787381324] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:31,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:31,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 20 [2025-03-17 14:32:31,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522353159] [2025-03-17 14:32:31,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:31,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:32:31,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:31,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:32:31,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:32:31,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 57 [2025-03-17 14:32:31,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 101 transitions, 908 flow. Second operand has 22 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:31,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:31,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 57 [2025-03-17 14:32:31,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:33,378 INFO L124 PetriNetUnfolderBase]: 10441/15845 cut-off events. [2025-03-17 14:32:33,378 INFO L125 PetriNetUnfolderBase]: For 60003/60407 co-relation queries the response was YES. [2025-03-17 14:32:33,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61301 conditions, 15845 events. 10441/15845 cut-off events. For 60003/60407 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 93018 event pairs, 1405 based on Foata normal form. 338/15871 useless extension candidates. Maximal degree in co-relation 43336. Up to 3759 conditions per place. [2025-03-17 14:32:33,478 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 201 selfloop transitions, 46 changer transitions 0/255 dead transitions. [2025-03-17 14:32:33,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 255 transitions, 2416 flow [2025-03-17 14:32:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 14:32:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 14:32:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 359 transitions. [2025-03-17 14:32:33,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3314866112650046 [2025-03-17 14:32:33,480 INFO L175 Difference]: Start difference. First operand has 122 places, 101 transitions, 908 flow. Second operand 19 states and 359 transitions. [2025-03-17 14:32:33,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 255 transitions, 2416 flow [2025-03-17 14:32:33,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 255 transitions, 2319 flow, removed 19 selfloop flow, removed 4 redundant places. [2025-03-17 14:32:33,565 INFO L231 Difference]: Finished difference. Result has 137 places, 114 transitions, 1134 flow [2025-03-17 14:32:33,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1134, PETRI_PLACES=137, PETRI_TRANSITIONS=114} [2025-03-17 14:32:33,566 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2025-03-17 14:32:33,566 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 114 transitions, 1134 flow [2025-03-17 14:32:33,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:33,566 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:33,566 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:33,574 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 14:32:33,767 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,SelfDestructingSolverStorable23 [2025-03-17 14:32:33,767 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:33,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:33,767 INFO L85 PathProgramCache]: Analyzing trace with hash -634637971, now seen corresponding path program 1 times [2025-03-17 14:32:33,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:33,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688172559] [2025-03-17 14:32:33,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:33,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:33,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:32:33,775 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:32:33,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:33,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:33,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:33,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688172559] [2025-03-17 14:32:33,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688172559] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:33,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466397278] [2025-03-17 14:32:33,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:33,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:33,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:33,828 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 14:32:33,830 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 14:32:33,873 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:32:33,889 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:32:33,889 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:33,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:33,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:32:33,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:33,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:33,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466397278] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:33,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:32:33,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-03-17 14:32:33,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660171879] [2025-03-17 14:32:33,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:33,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:33,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:33,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:32:33,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:33,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 114 transitions, 1134 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:33,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:33,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:33,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:35,170 INFO L124 PetriNetUnfolderBase]: 11604/17837 cut-off events. [2025-03-17 14:32:35,170 INFO L125 PetriNetUnfolderBase]: For 74143/74426 co-relation queries the response was YES. [2025-03-17 14:32:35,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69549 conditions, 17837 events. 11604/17837 cut-off events. For 74143/74426 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 106929 event pairs, 4398 based on Foata normal form. 522/17509 useless extension candidates. Maximal degree in co-relation 51685. Up to 9530 conditions per place. [2025-03-17 14:32:35,300 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 154 selfloop transitions, 12 changer transitions 0/174 dead transitions. [2025-03-17 14:32:35,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 174 transitions, 2172 flow [2025-03-17 14:32:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2025-03-17 14:32:35,301 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2025-03-17 14:32:35,301 INFO L175 Difference]: Start difference. First operand has 137 places, 114 transitions, 1134 flow. Second operand 5 states and 126 transitions. [2025-03-17 14:32:35,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 174 transitions, 2172 flow [2025-03-17 14:32:35,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 174 transitions, 2131 flow, removed 7 selfloop flow, removed 10 redundant places. [2025-03-17 14:32:35,376 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 1114 flow [2025-03-17 14:32:35,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1114, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2025-03-17 14:32:35,377 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2025-03-17 14:32:35,377 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 1114 flow [2025-03-17 14:32:35,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:35,377 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:35,377 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:35,382 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 14:32:35,577 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,SelfDestructingSolverStorable24 [2025-03-17 14:32:35,578 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:35,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1656746331, now seen corresponding path program 1 times [2025-03-17 14:32:35,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:35,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261248620] [2025-03-17 14:32:35,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:35,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:32:35,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:32:35,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:35,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:32:35,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:35,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261248620] [2025-03-17 14:32:35,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261248620] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:35,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658291135] [2025-03-17 14:32:35,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:35,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:35,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:35,749 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 14:32:35,754 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 14:32:35,800 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:32:35,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:32:35,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:35,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:35,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:32:35,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:32:35,939 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:36,016 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 24 treesize of output 20 [2025-03-17 14:32:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:32:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658291135] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:36,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:36,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-03-17 14:32:36,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868273013] [2025-03-17 14:32:36,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:36,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:32:36,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:36,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:32:36,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:32:36,241 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:36,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 1114 flow. Second operand has 22 states, 22 states have (on average 16.772727272727273) internal successors, (369), 22 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:36,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:36,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:36,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:37,780 INFO L124 PetriNetUnfolderBase]: 8920/13938 cut-off events. [2025-03-17 14:32:37,780 INFO L125 PetriNetUnfolderBase]: For 69037/69413 co-relation queries the response was YES. [2025-03-17 14:32:37,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53898 conditions, 13938 events. 8920/13938 cut-off events. For 69037/69413 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 83444 event pairs, 3199 based on Foata normal form. 523/13941 useless extension candidates. Maximal degree in co-relation 38945. Up to 4121 conditions per place. [2025-03-17 14:32:37,868 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 146 selfloop transitions, 25 changer transitions 16/196 dead transitions. [2025-03-17 14:32:37,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 196 transitions, 1914 flow [2025-03-17 14:32:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 14:32:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 14:32:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 328 transitions. [2025-03-17 14:32:37,869 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2025-03-17 14:32:37,869 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 1114 flow. Second operand 14 states and 328 transitions. [2025-03-17 14:32:37,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 196 transitions, 1914 flow [2025-03-17 14:32:37,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 196 transitions, 1843 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-03-17 14:32:37,932 INFO L231 Difference]: Finished difference. Result has 143 places, 96 transitions, 861 flow [2025-03-17 14:32:37,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=861, PETRI_PLACES=143, PETRI_TRANSITIONS=96} [2025-03-17 14:32:37,932 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2025-03-17 14:32:37,932 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 96 transitions, 861 flow [2025-03-17 14:32:37,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.772727272727273) internal successors, (369), 22 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:37,933 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:37,933 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:37,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:38,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:38,133 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:38,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:38,134 INFO L85 PathProgramCache]: Analyzing trace with hash 977151947, now seen corresponding path program 1 times [2025-03-17 14:32:38,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:38,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530876270] [2025-03-17 14:32:38,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:38,138 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 14:32:38,141 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:32:38,141 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:38,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:38,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:38,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530876270] [2025-03-17 14:32:38,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530876270] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:38,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886079173] [2025-03-17 14:32:38,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:38,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:38,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:38,184 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 14:32:38,185 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 14:32:38,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 14:32:38,248 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:32:38,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:38,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:38,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:32:38,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:38,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:38,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886079173] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:38,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:32:38,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-03-17 14:32:38,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116671785] [2025-03-17 14:32:38,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:38,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:38,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:38,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:38,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:32:38,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:38,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 96 transitions, 861 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:38,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:38,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:38,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:39,351 INFO L124 PetriNetUnfolderBase]: 7876/12094 cut-off events. [2025-03-17 14:32:39,351 INFO L125 PetriNetUnfolderBase]: For 58504/58842 co-relation queries the response was YES. [2025-03-17 14:32:39,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46903 conditions, 12094 events. 7876/12094 cut-off events. For 58504/58842 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 70077 event pairs, 2072 based on Foata normal form. 65/11650 useless extension candidates. Maximal degree in co-relation 39511. Up to 8159 conditions per place. [2025-03-17 14:32:39,443 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 90 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2025-03-17 14:32:39,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 117 transitions, 1173 flow [2025-03-17 14:32:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2025-03-17 14:32:39,444 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4280701754385965 [2025-03-17 14:32:39,444 INFO L175 Difference]: Start difference. First operand has 143 places, 96 transitions, 861 flow. Second operand 5 states and 122 transitions. [2025-03-17 14:32:39,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 117 transitions, 1173 flow [2025-03-17 14:32:39,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 117 transitions, 1074 flow, removed 10 selfloop flow, removed 20 redundant places. [2025-03-17 14:32:39,499 INFO L231 Difference]: Finished difference. Result has 128 places, 94 transitions, 782 flow [2025-03-17 14:32:39,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=782, PETRI_PLACES=128, PETRI_TRANSITIONS=94} [2025-03-17 14:32:39,499 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2025-03-17 14:32:39,499 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 94 transitions, 782 flow [2025-03-17 14:32:39,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:39,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:39,499 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:39,505 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 14:32:39,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-17 14:32:39,700 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:39,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash -656334443, now seen corresponding path program 2 times [2025-03-17 14:32:39,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:39,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857763470] [2025-03-17 14:32:39,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:39,706 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 14:32:39,717 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:32:39,717 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:39,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:39,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:39,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857763470] [2025-03-17 14:32:39,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857763470] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:39,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701305635] [2025-03-17 14:32:39,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:39,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:39,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:39,819 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 14:32:39,821 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 14:32:39,874 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 14:32:39,899 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:32:39,900 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:39,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:39,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:32:39,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:40,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:32:40,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701305635] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:40,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:40,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-03-17 14:32:40,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151666683] [2025-03-17 14:32:40,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:40,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:32:40,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:40,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:32:40,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:32:40,127 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:32:40,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 94 transitions, 782 flow. Second operand has 19 states, 19 states have (on average 16.94736842105263) internal successors, (322), 19 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:40,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:40,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:32:40,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:41,779 INFO L124 PetriNetUnfolderBase]: 11911/18449 cut-off events. [2025-03-17 14:32:41,779 INFO L125 PetriNetUnfolderBase]: For 85929/86479 co-relation queries the response was YES. [2025-03-17 14:32:41,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71094 conditions, 18449 events. 11911/18449 cut-off events. For 85929/86479 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 113779 event pairs, 6210 based on Foata normal form. 203/18222 useless extension candidates. Maximal degree in co-relation 44059. Up to 9499 conditions per place. [2025-03-17 14:32:41,933 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 169 selfloop transitions, 40 changer transitions 0/218 dead transitions. [2025-03-17 14:32:41,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 218 transitions, 2054 flow [2025-03-17 14:32:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:32:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:32:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 357 transitions. [2025-03-17 14:32:41,934 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39144736842105265 [2025-03-17 14:32:41,934 INFO L175 Difference]: Start difference. First operand has 128 places, 94 transitions, 782 flow. Second operand 16 states and 357 transitions. [2025-03-17 14:32:41,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 218 transitions, 2054 flow [2025-03-17 14:32:42,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 218 transitions, 2015 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:42,039 INFO L231 Difference]: Finished difference. Result has 145 places, 116 transitions, 1163 flow [2025-03-17 14:32:42,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1163, PETRI_PLACES=145, PETRI_TRANSITIONS=116} [2025-03-17 14:32:42,040 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2025-03-17 14:32:42,040 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 116 transitions, 1163 flow [2025-03-17 14:32:42,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.94736842105263) internal successors, (322), 19 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:42,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:42,040 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:42,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-17 14:32:42,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-17 14:32:42,240 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:42,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:42,241 INFO L85 PathProgramCache]: Analyzing trace with hash 841458384, now seen corresponding path program 1 times [2025-03-17 14:32:42,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:42,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735577946] [2025-03-17 14:32:42,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:42,247 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 14:32:42,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:32:42,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:42,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-17 14:32:42,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:42,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735577946] [2025-03-17 14:32:42,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735577946] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:42,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183112087] [2025-03-17 14:32:42,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:42,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:42,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:42,345 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:42,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 14:32:42,396 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 14:32:42,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:32:42,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:42,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:42,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:32:42,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-17 14:32:42,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:42,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-03-17 14:32:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-17 14:32:42,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183112087] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:42,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:42,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-17 14:32:42,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276541652] [2025-03-17 14:32:42,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:42,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:32:42,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:42,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:32:42,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:32:42,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-03-17 14:32:42,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 116 transitions, 1163 flow. Second operand has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:42,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:42,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-03-17 14:32:42,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:47,207 INFO L124 PetriNetUnfolderBase]: 24543/38259 cut-off events. [2025-03-17 14:32:47,208 INFO L125 PetriNetUnfolderBase]: For 186845/188483 co-relation queries the response was YES. [2025-03-17 14:32:47,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148077 conditions, 38259 events. 24543/38259 cut-off events. For 186845/188483 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 266611 event pairs, 3202 based on Foata normal form. 70/37278 useless extension candidates. Maximal degree in co-relation 96094. Up to 5250 conditions per place. [2025-03-17 14:32:47,502 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 434 selfloop transitions, 83 changer transitions 0/530 dead transitions. [2025-03-17 14:32:47,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 530 transitions, 5079 flow [2025-03-17 14:32:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 14:32:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 14:32:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 661 transitions. [2025-03-17 14:32:47,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5041952707856598 [2025-03-17 14:32:47,503 INFO L175 Difference]: Start difference. First operand has 145 places, 116 transitions, 1163 flow. Second operand 23 states and 661 transitions. [2025-03-17 14:32:47,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 530 transitions, 5079 flow [2025-03-17 14:32:47,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 530 transitions, 5073 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-03-17 14:32:47,806 INFO L231 Difference]: Finished difference. Result has 185 places, 190 transitions, 2265 flow [2025-03-17 14:32:47,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2265, PETRI_PLACES=185, PETRI_TRANSITIONS=190} [2025-03-17 14:32:47,807 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2025-03-17 14:32:47,807 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 190 transitions, 2265 flow [2025-03-17 14:32:47,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:47,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:47,807 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:47,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-17 14:32:48,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-17 14:32:48,008 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:48,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1466637196, now seen corresponding path program 2 times [2025-03-17 14:32:48,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:48,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961599479] [2025-03-17 14:32:48,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:48,013 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 14:32:48,016 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 32 statements. [2025-03-17 14:32:48,016 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:32:48,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-17 14:32:48,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:48,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961599479] [2025-03-17 14:32:48,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961599479] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:48,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:48,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:32:48,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507780813] [2025-03-17 14:32:48,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:48,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:32:48,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:48,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:32:48,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:32:48,117 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-03-17 14:32:48,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 190 transitions, 2265 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:48,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:48,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-03-17 14:32:48,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:54,258 INFO L124 PetriNetUnfolderBase]: 38160/56528 cut-off events. [2025-03-17 14:32:54,259 INFO L125 PetriNetUnfolderBase]: For 528843/530721 co-relation queries the response was YES. [2025-03-17 14:32:54,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270668 conditions, 56528 events. 38160/56528 cut-off events. For 528843/530721 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 378189 event pairs, 10950 based on Foata normal form. 155/56515 useless extension candidates. Maximal degree in co-relation 232772. Up to 25208 conditions per place. [2025-03-17 14:32:54,790 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 260 selfloop transitions, 104 changer transitions 0/375 dead transitions. [2025-03-17 14:32:54,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 375 transitions, 4705 flow [2025-03-17 14:32:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:32:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:32:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2025-03-17 14:32:54,791 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4543859649122807 [2025-03-17 14:32:54,791 INFO L175 Difference]: Start difference. First operand has 185 places, 190 transitions, 2265 flow. Second operand 10 states and 259 transitions. [2025-03-17 14:32:54,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 375 transitions, 4705 flow [2025-03-17 14:32:56,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 375 transitions, 4634 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-03-17 14:32:56,384 INFO L231 Difference]: Finished difference. Result has 196 places, 238 transitions, 3295 flow [2025-03-17 14:32:56,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3295, PETRI_PLACES=196, PETRI_TRANSITIONS=238} [2025-03-17 14:32:56,384 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 139 predicate places. [2025-03-17 14:32:56,384 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 238 transitions, 3295 flow [2025-03-17 14:32:56,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:56,385 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:56,385 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:56,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-17 14:32:56,385 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:32:56,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:56,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1381732846, now seen corresponding path program 3 times [2025-03-17 14:32:56,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:56,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258632357] [2025-03-17 14:32:56,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:56,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:56,391 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 4 equivalence classes. [2025-03-17 14:32:56,394 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 32 statements. [2025-03-17 14:32:56,394 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:32:56,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-17 14:32:56,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:56,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258632357] [2025-03-17 14:32:56,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258632357] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:56,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:56,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:32:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360073525] [2025-03-17 14:32:56,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:56,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:32:56,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:56,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:32:56,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:32:56,488 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-03-17 14:32:56,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 238 transitions, 3295 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:56,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:56,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-03-17 14:32:56,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:03,815 INFO L124 PetriNetUnfolderBase]: 40732/60143 cut-off events. [2025-03-17 14:33:03,815 INFO L125 PetriNetUnfolderBase]: For 675423/677217 co-relation queries the response was YES. [2025-03-17 14:33:04,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304808 conditions, 60143 events. 40732/60143 cut-off events. For 675423/677217 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 405150 event pairs, 2720 based on Foata normal form. 258/60357 useless extension candidates. Maximal degree in co-relation 273629. Up to 21588 conditions per place. [2025-03-17 14:33:04,505 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 264 selfloop transitions, 137 changer transitions 0/412 dead transitions. [2025-03-17 14:33:04,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 412 transitions, 5719 flow [2025-03-17 14:33:04,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:33:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:33:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2025-03-17 14:33:04,506 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4370015948963317 [2025-03-17 14:33:04,506 INFO L175 Difference]: Start difference. First operand has 196 places, 238 transitions, 3295 flow. Second operand 11 states and 274 transitions. [2025-03-17 14:33:04,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 412 transitions, 5719 flow [2025-03-17 14:33:08,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 412 transitions, 5590 flow, removed 61 selfloop flow, removed 2 redundant places. [2025-03-17 14:33:08,024 INFO L231 Difference]: Finished difference. Result has 208 places, 274 transitions, 4291 flow [2025-03-17 14:33:08,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4291, PETRI_PLACES=208, PETRI_TRANSITIONS=274} [2025-03-17 14:33:08,024 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 151 predicate places. [2025-03-17 14:33:08,024 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 274 transitions, 4291 flow [2025-03-17 14:33:08,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:33:08,025 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:08,025 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:08,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-03-17 14:33:08,025 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:33:08,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:08,025 INFO L85 PathProgramCache]: Analyzing trace with hash -97982255, now seen corresponding path program 1 times [2025-03-17 14:33:08,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:08,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948121538] [2025-03-17 14:33:08,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:08,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:08,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-17 14:33:08,034 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 14:33:08,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:08,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:33:08,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:08,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948121538] [2025-03-17 14:33:08,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948121538] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:08,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503909807] [2025-03-17 14:33:08,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:08,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:08,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:08,083 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:33:08,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 14:33:08,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-17 14:33:08,158 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 14:33:08,158 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:08,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:08,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:33:08,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:33:08,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:33:08,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503909807] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:08,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:33:08,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-03-17 14:33:08,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47365652] [2025-03-17 14:33:08,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:08,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:33:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:08,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:33:08,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:33:08,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:33:08,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 274 transitions, 4291 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:33:08,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:08,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:33:08,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:15,137 INFO L124 PetriNetUnfolderBase]: 37266/57174 cut-off events. [2025-03-17 14:33:15,137 INFO L125 PetriNetUnfolderBase]: For 742465/744641 co-relation queries the response was YES. [2025-03-17 14:33:15,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301473 conditions, 57174 events. 37266/57174 cut-off events. For 742465/744641 co-relation queries the response was YES. Maximal size of possible extension queue 1225. Compared 410027 event pairs, 8844 based on Foata normal form. 1/56124 useless extension candidates. Maximal degree in co-relation 269805. Up to 40372 conditions per place. [2025-03-17 14:33:15,975 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 233 selfloop transitions, 47 changer transitions 24/320 dead transitions. [2025-03-17 14:33:15,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 320 transitions, 5499 flow [2025-03-17 14:33:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:33:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:33:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2025-03-17 14:33:15,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4280701754385965 [2025-03-17 14:33:15,976 INFO L175 Difference]: Start difference. First operand has 208 places, 274 transitions, 4291 flow. Second operand 5 states and 122 transitions. [2025-03-17 14:33:15,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 320 transitions, 5499 flow [2025-03-17 14:33:20,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 320 transitions, 5300 flow, removed 36 selfloop flow, removed 4 redundant places. [2025-03-17 14:33:20,634 INFO L231 Difference]: Finished difference. Result has 210 places, 255 transitions, 3965 flow [2025-03-17 14:33:20,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=4105, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3965, PETRI_PLACES=210, PETRI_TRANSITIONS=255} [2025-03-17 14:33:20,634 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 153 predicate places. [2025-03-17 14:33:20,634 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 255 transitions, 3965 flow [2025-03-17 14:33:20,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:33:20,634 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:20,634 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:20,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-17 14:33:20,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:20,835 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-03-17 14:33:20,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1925157486, now seen corresponding path program 3 times [2025-03-17 14:33:20,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:20,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100672378] [2025-03-17 14:33:20,836 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:33:20,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:20,843 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 5 equivalence classes. [2025-03-17 14:33:20,850 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 34 statements. [2025-03-17 14:33:20,853 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:33:20,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-17 14:33:20,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:20,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100672378] [2025-03-17 14:33:20,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100672378] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:20,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548021469] [2025-03-17 14:33:20,965 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:33:20,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:20,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:20,968 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:33:20,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 14:33:21,017 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 5 equivalence classes. [2025-03-17 14:33:21,032 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 34 statements. [2025-03-17 14:33:21,032 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:33:21,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:21,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:33:21,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:21,047 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 14:33:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-17 14:33:21,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-17 14:33:21,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548021469] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:21,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:21,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2025-03-17 14:33:21,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624623654] [2025-03-17 14:33:21,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:21,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:33:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:21,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:33:21,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:33:21,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-03-17 14:33:21,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 255 transitions, 3965 flow. Second operand has 22 states, 22 states have (on average 17.136363636363637) internal successors, (377), 22 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:33:21,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:21,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-03-17 14:33:21,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:27,130 INFO L124 PetriNetUnfolderBase]: 28587/43057 cut-off events. [2025-03-17 14:33:27,131 INFO L125 PetriNetUnfolderBase]: For 596187/598705 co-relation queries the response was YES. [2025-03-17 14:33:27,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239819 conditions, 43057 events. 28587/43057 cut-off events. For 596187/598705 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 295984 event pairs, 4833 based on Foata normal form. 1512/44479 useless extension candidates. Maximal degree in co-relation 207478. Up to 22531 conditions per place. [2025-03-17 14:33:27,944 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 235 selfloop transitions, 95 changer transitions 0/345 dead transitions. [2025-03-17 14:33:27,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 345 transitions, 5440 flow [2025-03-17 14:33:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:33:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:33:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2025-03-17 14:33:27,945 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2025-03-17 14:33:27,945 INFO L175 Difference]: Start difference. First operand has 210 places, 255 transitions, 3965 flow. Second operand 8 states and 198 transitions. [2025-03-17 14:33:27,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 345 transitions, 5440 flow