./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/bigshot_s2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/bigshot_s2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:31:42,586 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:31:42,643 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:31:42,647 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:31:42,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:31:42,665 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:31:42,666 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:31:42,666 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:31:42,666 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:31:42,666 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:31:42,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:31:42,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:31:42,666 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:31:42,667 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:31:42,668 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:31:42,668 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:31:42,669 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:31:42,670 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:31:42,670 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:31:42,670 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:31:42,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:31:42,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:31:42,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:31:42,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:31:42,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:31:42,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:31:42,671 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:31:42,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:31:42,671 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:31:42,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:31:42,671 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:31:42,671 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:31:42,671 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-jdk21/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 -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2025-02-06 12:31:42,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:31:42,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:31:42,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:31:42,908 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:31:42,908 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:31:42,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s2.i [2025-02-06 12:31:44,171 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/af3dd591a/08783081484d469d9af4db04319624d2/FLAGdd77b646b [2025-02-06 12:31:44,471 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:31:44,472 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s2.i [2025-02-06 12:31:44,492 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/af3dd591a/08783081484d469d9af4db04319624d2/FLAGdd77b646b [2025-02-06 12:31:44,719 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/af3dd591a/08783081484d469d9af4db04319624d2 [2025-02-06 12:31:44,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:31:44,721 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:31:44,723 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:31:44,723 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:31:44,727 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:31:44,728 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,729 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d663d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44, skipping insertion in model container [2025-02-06 12:31:44,729 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,763 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:31:45,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:31:45,044 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:31:45,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:31:45,125 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:31:45,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45 WrapperNode [2025-02-06 12:31:45,126 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:31:45,127 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:31:45,127 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:31:45,127 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:31:45,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,144 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,162 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2025-02-06 12:31:45,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:31:45,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:31:45,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:31:45,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:31:45,167 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,169 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,183 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-02-06 12:31:45,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,197 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,198 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,199 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:31:45,203 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:31:45,203 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:31:45,203 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:31:45,204 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (1/1) ... [2025-02-06 12:31:45,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:31:45,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:45,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 12:31:45,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 12:31:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-02-06 12:31:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-02-06 12:31:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-02-06 12:31:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 12:31:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 12:31:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 12:31:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 12:31:45,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 12:31:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 12:31:45,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 12:31:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 12:31:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:31:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 12:31:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 12:31:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 12:31:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:31:45,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:31:45,255 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:31:45,371 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:31:45,372 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:31:45,540 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:31:45,540 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:31:45,608 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:31:45,610 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:31:45,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:31:45 BoogieIcfgContainer [2025-02-06 12:31:45,610 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:31:45,612 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:31:45,612 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:31:45,616 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:31:45,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:31:44" (1/3) ... [2025-02-06 12:31:45,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f4bff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:31:45, skipping insertion in model container [2025-02-06 12:31:45,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:45" (2/3) ... [2025-02-06 12:31:45,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f4bff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:31:45, skipping insertion in model container [2025-02-06 12:31:45,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:31:45" (3/3) ... [2025-02-06 12:31:45,618 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2025-02-06 12:31:45,628 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:31:45,630 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s2.i that has 3 procedures, 40 locations, 1 initial locations, 1 loop locations, and 10 error locations. [2025-02-06 12:31:45,630 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:31:45,684 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 12:31:45,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 44 transitions, 102 flow [2025-02-06 12:31:45,749 INFO L124 PetriNetUnfolderBase]: 5/42 cut-off events. [2025-02-06 12:31:45,750 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:31:45,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 5/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 84 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2025-02-06 12:31:45,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 44 transitions, 102 flow [2025-02-06 12:31:45,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 41 transitions, 94 flow [2025-02-06 12:31:45,772 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:31:45,790 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;@1c2f07c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:31:45,791 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-02-06 12:31:45,799 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:31:45,799 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2025-02-06 12:31:45,799 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:31:45,799 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:45,800 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:45,800 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:45,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1129391956, now seen corresponding path program 1 times [2025-02-06 12:31:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:45,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206626783] [2025-02-06 12:31:45,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:45,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:45,869 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:31:45,891 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:31:45,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:45,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:46,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:46,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206626783] [2025-02-06 12:31:46,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206626783] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:46,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:46,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:31:46,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729458853] [2025-02-06 12:31:46,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:46,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:31:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:46,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:31:46,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:31:46,162 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2025-02-06 12:31:46,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:46,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2025-02-06 12:31:46,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:46,222 INFO L124 PetriNetUnfolderBase]: 9/57 cut-off events. [2025-02-06 12:31:46,222 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:31:46,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 57 events. 9/57 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 144 event pairs, 2 based on Foata normal form. 4/52 useless extension candidates. Maximal degree in co-relation 77. Up to 20 conditions per place. [2025-02-06 12:31:46,224 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 16 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2025-02-06 12:31:46,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 122 flow [2025-02-06 12:31:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:31:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:31:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2025-02-06 12:31:46,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2025-02-06 12:31:46,234 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 94 flow. Second operand 4 states and 100 transitions. [2025-02-06 12:31:46,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 122 flow [2025-02-06 12:31:46,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 114 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:31:46,239 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 80 flow [2025-02-06 12:31:46,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2025-02-06 12:31:46,242 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2025-02-06 12:31:46,243 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 80 flow [2025-02-06 12:31:46,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:46,243 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:46,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 12:31:46,243 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:46,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash 651412442, now seen corresponding path program 1 times [2025-02-06 12:31:46,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:46,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578723469] [2025-02-06 12:31:46,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:46,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 12:31:46,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 12:31:46,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:46,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:46,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:46,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578723469] [2025-02-06 12:31:46,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578723469] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:46,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:46,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:31:46,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734018236] [2025-02-06 12:31:46,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:46,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:31:46,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:46,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:31:46,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:31:46,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2025-02-06 12:31:46,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2025-02-06 12:31:46,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:46,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2025-02-06 12:31:46,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:46,496 INFO L124 PetriNetUnfolderBase]: 14/74 cut-off events. [2025-02-06 12:31:46,496 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 12:31:46,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 74 events. 14/74 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 167 event pairs, 6 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 48. Up to 36 conditions per place. [2025-02-06 12:31:46,497 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 19 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2025-02-06 12:31:46,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 136 flow [2025-02-06 12:31:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:31:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:31:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2025-02-06 12:31:46,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2025-02-06 12:31:46,500 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 80 flow. Second operand 4 states and 105 transitions. [2025-02-06 12:31:46,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 136 flow [2025-02-06 12:31:46,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:31:46,502 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 97 flow [2025-02-06 12:31:46,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2025-02-06 12:31:46,502 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2025-02-06 12:31:46,502 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 97 flow [2025-02-06 12:31:46,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2025-02-06 12:31:46,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:46,503 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:46,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 12:31:46,504 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:46,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:46,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1282011161, now seen corresponding path program 1 times [2025-02-06 12:31:46,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:46,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148019577] [2025-02-06 12:31:46,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:46,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:46,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 12:31:46,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 12:31:46,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:46,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:46,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:46,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148019577] [2025-02-06 12:31:46,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148019577] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:46,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:46,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:31:46,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833665875] [2025-02-06 12:31:46,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:46,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:31:46,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:46,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:31:46,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:31:46,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2025-02-06 12:31:46,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:46,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2025-02-06 12:31:46,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:46,602 INFO L124 PetriNetUnfolderBase]: 11/71 cut-off events. [2025-02-06 12:31:46,605 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-02-06 12:31:46,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 71 events. 11/71 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 165 event pairs, 6 based on Foata normal form. 1/62 useless extension candidates. Maximal degree in co-relation 44. Up to 33 conditions per place. [2025-02-06 12:31:46,606 INFO L140 encePairwiseOnDemand]: 42/44 looper letters, 19 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2025-02-06 12:31:46,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 137 flow [2025-02-06 12:31:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:31:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:31:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2025-02-06 12:31:46,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2025-02-06 12:31:46,607 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 97 flow. Second operand 3 states and 82 transitions. [2025-02-06 12:31:46,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 137 flow [2025-02-06 12:31:46,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:31:46,608 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 92 flow [2025-02-06 12:31:46,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2025-02-06 12:31:46,609 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2025-02-06 12:31:46,609 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 92 flow [2025-02-06 12:31:46,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:46,609 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:46,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 12:31:46,609 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:46,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1606646826, now seen corresponding path program 1 times [2025-02-06 12:31:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:46,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207635060] [2025-02-06 12:31:46,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:46,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 12:31:46,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 12:31:46,624 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:46,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:46,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:46,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207635060] [2025-02-06 12:31:46,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207635060] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:46,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:46,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:31:46,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987202881] [2025-02-06 12:31:46,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:46,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:31:46,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:46,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:31:46,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:31:46,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2025-02-06 12:31:46,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:46,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2025-02-06 12:31:46,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:46,733 INFO L124 PetriNetUnfolderBase]: 13/76 cut-off events. [2025-02-06 12:31:46,733 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 12:31:46,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 76 events. 13/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 161 event pairs, 2 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 121. Up to 20 conditions per place. [2025-02-06 12:31:46,734 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 18 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2025-02-06 12:31:46,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 136 flow [2025-02-06 12:31:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:31:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:31:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-02-06 12:31:46,735 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2025-02-06 12:31:46,735 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 92 flow. Second operand 4 states and 98 transitions. [2025-02-06 12:31:46,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 136 flow [2025-02-06 12:31:46,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:31:46,736 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 95 flow [2025-02-06 12:31:46,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2025-02-06 12:31:46,737 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2025-02-06 12:31:46,737 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 95 flow [2025-02-06 12:31:46,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:46,737 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:46,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 12:31:46,737 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:46,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1733556124, now seen corresponding path program 1 times [2025-02-06 12:31:46,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:46,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713954840] [2025-02-06 12:31:46,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:46,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:46,742 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 12:31:46,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 12:31:46,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:46,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:46,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:46,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713954840] [2025-02-06 12:31:46,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713954840] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:46,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:46,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:31:46,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890683702] [2025-02-06 12:31:46,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:46,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:31:46,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:46,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:31:46,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:31:46,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2025-02-06 12:31:46,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2025-02-06 12:31:46,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:46,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2025-02-06 12:31:46,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:46,886 INFO L124 PetriNetUnfolderBase]: 12/64 cut-off events. [2025-02-06 12:31:46,887 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-06 12:31:46,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 64 events. 12/64 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 110 event pairs, 5 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 110. Up to 30 conditions per place. [2025-02-06 12:31:46,887 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 19 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2025-02-06 12:31:46,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 145 flow [2025-02-06 12:31:46,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:31:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:31:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2025-02-06 12:31:46,888 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2025-02-06 12:31:46,888 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 95 flow. Second operand 4 states and 105 transitions. [2025-02-06 12:31:46,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 145 flow [2025-02-06 12:31:46,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 137 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:31:46,889 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 98 flow [2025-02-06 12:31:46,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2025-02-06 12:31:46,890 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2025-02-06 12:31:46,890 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 98 flow [2025-02-06 12:31:46,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2025-02-06 12:31:46,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:46,891 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:46,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 12:31:46,891 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:46,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:46,894 INFO L85 PathProgramCache]: Analyzing trace with hash -971156562, now seen corresponding path program 1 times [2025-02-06 12:31:46,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:46,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075261172] [2025-02-06 12:31:46,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:46,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:46,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 12:31:46,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:31:46,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:46,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:47,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075261172] [2025-02-06 12:31:47,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075261172] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:47,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422375847] [2025-02-06 12:31:47,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:47,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:47,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:47,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:47,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 12:31:47,092 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 12:31:47,106 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:31:47,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:47,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:47,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 12:31:47,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:47,180 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:31:47,181 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 14 treesize of output 13 [2025-02-06 12:31:47,209 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:31:47,210 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 [2025-02-06 12:31:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:47,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:47,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422375847] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:47,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:47,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2025-02-06 12:31:47,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104683641] [2025-02-06 12:31:47,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:47,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 12:31:47,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:47,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 12:31:47,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-02-06 12:31:47,770 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2025-02-06 12:31:47,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 98 flow. Second operand has 13 states, 13 states have (on average 19.23076923076923) internal successors, (250), 13 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:47,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:47,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2025-02-06 12:31:47,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:47,914 INFO L124 PetriNetUnfolderBase]: 30/129 cut-off events. [2025-02-06 12:31:47,914 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-02-06 12:31:47,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 129 events. 30/129 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 220 event pairs, 6 based on Foata normal form. 12/139 useless extension candidates. Maximal degree in co-relation 239. Up to 35 conditions per place. [2025-02-06 12:31:47,915 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 30 selfloop transitions, 11 changer transitions 0/51 dead transitions. [2025-02-06 12:31:47,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 222 flow [2025-02-06 12:31:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:31:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:31:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2025-02-06 12:31:47,916 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5162337662337663 [2025-02-06 12:31:47,916 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 98 flow. Second operand 7 states and 159 transitions. [2025-02-06 12:31:47,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 222 flow [2025-02-06 12:31:47,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:31:47,917 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 152 flow [2025-02-06 12:31:47,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2025-02-06 12:31:47,918 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2025-02-06 12:31:47,918 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 152 flow [2025-02-06 12:31:47,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.23076923076923) internal successors, (250), 13 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:47,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:47,919 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:47,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 12:31:48,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:48,120 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:48,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1273547216, now seen corresponding path program 1 times [2025-02-06 12:31:48,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:48,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094892091] [2025-02-06 12:31:48,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:48,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:48,138 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 12:31:48,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:31:48,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:48,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:48,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094892091] [2025-02-06 12:31:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094892091] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344482564] [2025-02-06 12:31:48,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:48,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:48,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:48,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:48,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 12:31:48,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 12:31:48,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:31:48,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:48,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:48,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 12:31:48,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:48,413 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 [2025-02-06 12:31:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:48,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:48,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344482564] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:48,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:48,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 12:31:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006269331] [2025-02-06 12:31:48,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:48,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 12:31:48,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:48,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 12:31:48,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-02-06 12:31:48,847 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2025-02-06 12:31:48,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 152 flow. Second operand has 11 states, 11 states have (on average 21.727272727272727) internal successors, (239), 11 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:48,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:48,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2025-02-06 12:31:48,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:48,970 INFO L124 PetriNetUnfolderBase]: 25/120 cut-off events. [2025-02-06 12:31:48,971 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-02-06 12:31:48,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 120 events. 25/120 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 184 event pairs, 4 based on Foata normal form. 6/123 useless extension candidates. Maximal degree in co-relation 249. Up to 29 conditions per place. [2025-02-06 12:31:48,972 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 26 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2025-02-06 12:31:48,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 250 flow [2025-02-06 12:31:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:31:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:31:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2025-02-06 12:31:48,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2025-02-06 12:31:48,973 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 152 flow. Second operand 7 states and 173 transitions. [2025-02-06 12:31:48,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 250 flow [2025-02-06 12:31:48,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 234 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-02-06 12:31:48,974 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 186 flow [2025-02-06 12:31:48,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2025-02-06 12:31:48,975 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2025-02-06 12:31:48,975 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 186 flow [2025-02-06 12:31:48,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.727272727272727) internal successors, (239), 11 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:48,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:48,976 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] [2025-02-06 12:31:48,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 12:31:49,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:49,176 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:49,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:49,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1280635594, now seen corresponding path program 1 times [2025-02-06 12:31:49,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:49,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550694950] [2025-02-06 12:31:49,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:49,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:49,182 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 12:31:49,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 12:31:49,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:49,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:49,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:49,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550694950] [2025-02-06 12:31:49,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550694950] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:49,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:49,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 12:31:49,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100671482] [2025-02-06 12:31:49,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:49,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:31:49,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:49,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:31:49,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:31:49,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2025-02-06 12:31:49,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:49,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:49,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2025-02-06 12:31:49,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:49,538 INFO L124 PetriNetUnfolderBase]: 21/119 cut-off events. [2025-02-06 12:31:49,538 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2025-02-06 12:31:49,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 119 events. 21/119 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 185 event pairs, 12 based on Foata normal form. 2/120 useless extension candidates. Maximal degree in co-relation 272. Up to 51 conditions per place. [2025-02-06 12:31:49,539 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 23 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2025-02-06 12:31:49,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 42 transitions, 242 flow [2025-02-06 12:31:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:31:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:31:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2025-02-06 12:31:49,540 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2025-02-06 12:31:49,540 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 186 flow. Second operand 6 states and 145 transitions. [2025-02-06 12:31:49,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 42 transitions, 242 flow [2025-02-06 12:31:49,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 229 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 12:31:49,542 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 183 flow [2025-02-06 12:31:49,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2025-02-06 12:31:49,543 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2025-02-06 12:31:49,543 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 183 flow [2025-02-06 12:31:49,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:49,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:49,543 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:49,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 12:31:49,543 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:49,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 715229174, now seen corresponding path program 1 times [2025-02-06 12:31:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:49,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611538884] [2025-02-06 12:31:49,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:49,550 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 12:31:49,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 12:31:49,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:49,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:49,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:49,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611538884] [2025-02-06 12:31:49,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611538884] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:49,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613220947] [2025-02-06 12:31:49,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:49,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:49,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:49,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:49,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 12:31:49,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 12:31:49,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 12:31:49,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:49,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:49,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-06 12:31:49,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:49,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 12:31:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:49,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:50,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613220947] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:50,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:50,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-02-06 12:31:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137080452] [2025-02-06 12:31:50,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:50,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 12:31:50,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:50,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 12:31:50,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-06 12:31:50,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2025-02-06 12:31:50,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 183 flow. Second operand has 14 states, 14 states have (on average 24.142857142857142) internal successors, (338), 14 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:50,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:50,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2025-02-06 12:31:50,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:50,486 INFO L124 PetriNetUnfolderBase]: 18/114 cut-off events. [2025-02-06 12:31:50,486 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2025-02-06 12:31:50,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 114 events. 18/114 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 9 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 262. Up to 40 conditions per place. [2025-02-06 12:31:50,488 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 23 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2025-02-06 12:31:50,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 43 transitions, 244 flow [2025-02-06 12:31:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:31:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:31:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2025-02-06 12:31:50,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2025-02-06 12:31:50,489 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 183 flow. Second operand 7 states and 175 transitions. [2025-02-06 12:31:50,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 43 transitions, 244 flow [2025-02-06 12:31:50,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 43 transitions, 241 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:31:50,493 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 195 flow [2025-02-06 12:31:50,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=195, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2025-02-06 12:31:50,493 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2025-02-06 12:31:50,493 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 195 flow [2025-02-06 12:31:50,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.142857142857142) internal successors, (338), 14 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:50,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:50,495 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:50,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 12:31:50,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:50,700 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:50,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:50,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1789344798, now seen corresponding path program 2 times [2025-02-06 12:31:50,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:50,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027902180] [2025-02-06 12:31:50,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:50,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:50,718 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-06 12:31:50,733 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 12:31:50,733 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:31:50,733 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:51,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:51,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027902180] [2025-02-06 12:31:51,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027902180] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:51,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582275699] [2025-02-06 12:31:51,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:51,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:51,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:51,143 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:51,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 12:31:51,183 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-06 12:31:51,207 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 12:31:51,207 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:31:51,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:51,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 12:31:51,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:51,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 12:31:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:51,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:51,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582275699] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:51,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:51,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-02-06 12:31:51,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618634802] [2025-02-06 12:31:51,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:51,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 12:31:51,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:51,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 12:31:51,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-02-06 12:31:52,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2025-02-06 12:31:52,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 195 flow. Second operand has 17 states, 17 states have (on average 23.941176470588236) internal successors, (407), 17 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:52,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:52,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2025-02-06 12:31:52,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:52,309 INFO L124 PetriNetUnfolderBase]: 15/111 cut-off events. [2025-02-06 12:31:52,310 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2025-02-06 12:31:52,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 111 events. 15/111 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 156 event pairs, 6 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 266. Up to 31 conditions per place. [2025-02-06 12:31:52,311 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 23 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2025-02-06 12:31:52,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 44 transitions, 262 flow [2025-02-06 12:31:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 12:31:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 12:31:52,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2025-02-06 12:31:52,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2025-02-06 12:31:52,313 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 195 flow. Second operand 8 states and 199 transitions. [2025-02-06 12:31:52,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 44 transitions, 262 flow [2025-02-06 12:31:52,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 44 transitions, 250 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-06 12:31:52,321 INFO L231 Difference]: Finished difference. Result has 65 places, 39 transitions, 202 flow [2025-02-06 12:31:52,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=39} [2025-02-06 12:31:52,322 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2025-02-06 12:31:52,322 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 39 transitions, 202 flow [2025-02-06 12:31:52,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 23.941176470588236) internal successors, (407), 17 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:52,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:52,322 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:52,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 12:31:52,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 12:31:52,523 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:52,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:52,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1034683162, now seen corresponding path program 2 times [2025-02-06 12:31:52,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:52,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188446719] [2025-02-06 12:31:52,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:52,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:52,530 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-06 12:31:52,542 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-06 12:31:52,542 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:31:52,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:52,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:52,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188446719] [2025-02-06 12:31:52,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188446719] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:52,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363452390] [2025-02-06 12:31:52,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:52,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:52,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:52,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:52,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 12:31:52,744 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-06 12:31:52,764 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-06 12:31:52,765 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:31:52,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:52,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 12:31:52,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:52,790 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:31:52,790 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 14 treesize of output 13 [2025-02-06 12:31:52,798 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:31:52,798 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 [2025-02-06 12:31:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:53,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:53,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363452390] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:53,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:53,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2025-02-06 12:31:53,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615424816] [2025-02-06 12:31:53,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:53,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 12:31:53,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:53,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 12:31:53,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2025-02-06 12:31:53,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2025-02-06 12:31:53,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 39 transitions, 202 flow. Second operand has 22 states, 22 states have (on average 19.545454545454547) internal successors, (430), 22 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:53,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:53,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2025-02-06 12:31:53,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:54,100 INFO L124 PetriNetUnfolderBase]: 48/207 cut-off events. [2025-02-06 12:31:54,101 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2025-02-06 12:31:54,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 207 events. 48/207 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 6 based on Foata normal form. 8/213 useless extension candidates. Maximal degree in co-relation 605. Up to 38 conditions per place. [2025-02-06 12:31:54,102 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 46 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2025-02-06 12:31:54,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 486 flow [2025-02-06 12:31:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 12:31:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 12:31:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2025-02-06 12:31:54,103 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-06 12:31:54,103 INFO L175 Difference]: Start difference. First operand has 65 places, 39 transitions, 202 flow. Second operand 11 states and 242 transitions. [2025-02-06 12:31:54,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 486 flow [2025-02-06 12:31:54,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 470 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-02-06 12:31:54,107 INFO L231 Difference]: Finished difference. Result has 74 places, 48 transitions, 327 flow [2025-02-06 12:31:54,107 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=327, PETRI_PLACES=74, PETRI_TRANSITIONS=48} [2025-02-06 12:31:54,108 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2025-02-06 12:31:54,108 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 48 transitions, 327 flow [2025-02-06 12:31:54,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.545454545454547) internal successors, (430), 22 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:54,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:54,108 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:54,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 12:31:54,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-06 12:31:54,312 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:54,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2101888356, now seen corresponding path program 2 times [2025-02-06 12:31:54,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:54,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259179264] [2025-02-06 12:31:54,314 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:54,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:54,332 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-06 12:31:54,338 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 42 statements. [2025-02-06 12:31:54,338 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 12:31:54,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-06 12:31:54,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:54,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259179264] [2025-02-06 12:31:54,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259179264] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:54,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791759784] [2025-02-06 12:31:54,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:54,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:54,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:54,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:54,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 12:31:54,521 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-06 12:31:54,530 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 42 statements. [2025-02-06 12:31:54,530 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 12:31:54,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:54,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 12:31:54,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:54,575 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:31:54,577 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 14 treesize of output 13 [2025-02-06 12:31:54,589 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:31:54,589 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 [2025-02-06 12:31:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-06 12:31:55,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-06 12:31:55,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791759784] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:55,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:55,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-02-06 12:31:55,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367990626] [2025-02-06 12:31:55,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:55,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 12:31:55,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:55,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 12:31:55,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2025-02-06 12:31:56,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2025-02-06 12:31:56,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 48 transitions, 327 flow. Second operand has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:56,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:56,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2025-02-06 12:31:56,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:56,297 INFO L124 PetriNetUnfolderBase]: 55/207 cut-off events. [2025-02-06 12:31:56,297 INFO L125 PetriNetUnfolderBase]: For 587/587 co-relation queries the response was YES. [2025-02-06 12:31:56,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 207 events. 55/207 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 278 event pairs, 2 based on Foata normal form. 8/214 useless extension candidates. Maximal degree in co-relation 646. Up to 80 conditions per place. [2025-02-06 12:31:56,298 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 24 selfloop transitions, 19 changer transitions 0/52 dead transitions. [2025-02-06 12:31:56,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 52 transitions, 415 flow [2025-02-06 12:31:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:31:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:31:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2025-02-06 12:31:56,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2025-02-06 12:31:56,299 INFO L175 Difference]: Start difference. First operand has 74 places, 48 transitions, 327 flow. Second operand 6 states and 122 transitions. [2025-02-06 12:31:56,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 52 transitions, 415 flow [2025-02-06 12:31:56,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 52 transitions, 390 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 12:31:56,301 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 347 flow [2025-02-06 12:31:56,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2025-02-06 12:31:56,302 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2025-02-06 12:31:56,302 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 347 flow [2025-02-06 12:31:56,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:56,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:56,302 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:56,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 12:31:56,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-06 12:31:56,503 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:56,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:56,504 INFO L85 PathProgramCache]: Analyzing trace with hash 490545482, now seen corresponding path program 3 times [2025-02-06 12:31:56,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:56,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520368418] [2025-02-06 12:31:56,504 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:31:56,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:56,521 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 4 equivalence classes. [2025-02-06 12:31:56,534 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 12:31:56,534 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-06 12:31:56,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:57,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:57,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520368418] [2025-02-06 12:31:57,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520368418] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:57,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19141644] [2025-02-06 12:31:57,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:31:57,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:57,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:57,009 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:57,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 12:31:57,053 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 4 equivalence classes. [2025-02-06 12:31:57,080 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 12:31:57,080 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-06 12:31:57,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:57,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 12:31:57,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:57,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 12:31:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:57,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:57,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19141644] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:57,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:57,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2025-02-06 12:31:57,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16734746] [2025-02-06 12:31:57,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:57,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 12:31:57,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:57,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 12:31:57,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2025-02-06 12:31:57,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2025-02-06 12:31:57,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 347 flow. Second operand has 21 states, 21 states have (on average 23.142857142857142) internal successors, (486), 21 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:57,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:57,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2025-02-06 12:31:57,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:58,094 INFO L124 PetriNetUnfolderBase]: 40/190 cut-off events. [2025-02-06 12:31:58,094 INFO L125 PetriNetUnfolderBase]: For 704/704 co-relation queries the response was YES. [2025-02-06 12:31:58,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 190 events. 40/190 cut-off events. For 704/704 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 254 event pairs, 18 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 602. Up to 73 conditions per place. [2025-02-06 12:31:58,096 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 38 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2025-02-06 12:31:58,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 58 transitions, 474 flow [2025-02-06 12:31:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 12:31:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 12:31:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2025-02-06 12:31:58,100 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2025-02-06 12:31:58,100 INFO L175 Difference]: Start difference. First operand has 71 places, 48 transitions, 347 flow. Second operand 10 states and 241 transitions. [2025-02-06 12:31:58,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 58 transitions, 474 flow [2025-02-06 12:31:58,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 58 transitions, 446 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:31:58,104 INFO L231 Difference]: Finished difference. Result has 78 places, 48 transitions, 343 flow [2025-02-06 12:31:58,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=343, PETRI_PLACES=78, PETRI_TRANSITIONS=48} [2025-02-06 12:31:58,105 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2025-02-06 12:31:58,105 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 48 transitions, 343 flow [2025-02-06 12:31:58,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 23.142857142857142) internal successors, (486), 21 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:58,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:58,106 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:58,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 12:31:58,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:58,311 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:58,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash -303532702, now seen corresponding path program 4 times [2025-02-06 12:31:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:58,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080309860] [2025-02-06 12:31:58,311 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 12:31:58,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:58,334 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 52 statements into 2 equivalence classes. [2025-02-06 12:31:58,359 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-02-06 12:31:58,360 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 12:31:58,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080309860] [2025-02-06 12:31:58,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080309860] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826977045] [2025-02-06 12:31:58,795 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 12:31:58,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:58,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:58,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:58,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 12:31:58,851 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 52 statements into 2 equivalence classes. [2025-02-06 12:31:58,878 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-02-06 12:31:58,878 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 12:31:58,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:58,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 12:31:58,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:59,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 12:31:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:59,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:59,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826977045] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:59,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:59,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2025-02-06 12:31:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264176857] [2025-02-06 12:31:59,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:59,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 12:31:59,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:59,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 12:31:59,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2025-02-06 12:31:59,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2025-02-06 12:31:59,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 48 transitions, 343 flow. Second operand has 24 states, 24 states have (on average 22.583333333333332) internal successors, (542), 24 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:59,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:59,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2025-02-06 12:31:59,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:00,017 INFO L124 PetriNetUnfolderBase]: 29/177 cut-off events. [2025-02-06 12:32:00,017 INFO L125 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2025-02-06 12:32:00,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 177 events. 29/177 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 12 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 548. Up to 51 conditions per place. [2025-02-06 12:32:00,018 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2025-02-06 12:32:00,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 55 transitions, 435 flow [2025-02-06 12:32:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 12:32:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 12:32:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2025-02-06 12:32:00,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2025-02-06 12:32:00,020 INFO L175 Difference]: Start difference. First operand has 78 places, 48 transitions, 343 flow. Second operand 10 states and 237 transitions. [2025-02-06 12:32:00,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 55 transitions, 435 flow [2025-02-06 12:32:00,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 55 transitions, 413 flow, removed 3 selfloop flow, removed 8 redundant places. [2025-02-06 12:32:00,023 INFO L231 Difference]: Finished difference. Result has 81 places, 48 transitions, 345 flow [2025-02-06 12:32:00,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=81, PETRI_TRANSITIONS=48} [2025-02-06 12:32:00,025 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2025-02-06 12:32:00,025 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 48 transitions, 345 flow [2025-02-06 12:32:00,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 22.583333333333332) internal successors, (542), 24 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:00,026 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:00,026 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:00,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:00,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:00,226 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:00,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:00,227 INFO L85 PathProgramCache]: Analyzing trace with hash 14427382, now seen corresponding path program 5 times [2025-02-06 12:32:00,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:00,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619463561] [2025-02-06 12:32:00,227 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 12:32:00,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:00,232 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 6 equivalence classes. [2025-02-06 12:32:00,239 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 59 of 59 statements. [2025-02-06 12:32:00,239 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-06 12:32:00,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:00,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:00,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619463561] [2025-02-06 12:32:00,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619463561] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:00,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523544746] [2025-02-06 12:32:00,431 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 12:32:00,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:00,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:00,433 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:00,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 12:32:00,477 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 6 equivalence classes. [2025-02-06 12:32:00,504 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 59 of 59 statements. [2025-02-06 12:32:00,504 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-06 12:32:00,504 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:00,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 12:32:00,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:00,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 12:32:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:00,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:00,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523544746] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:00,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:00,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-02-06 12:32:00,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277475403] [2025-02-06 12:32:00,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:00,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 12:32:00,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:00,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 12:32:00,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-02-06 12:32:01,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2025-02-06 12:32:01,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 48 transitions, 345 flow. Second operand has 26 states, 26 states have (on average 23.615384615384617) internal successors, (614), 26 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:01,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:01,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2025-02-06 12:32:01,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:01,662 INFO L124 PetriNetUnfolderBase]: 26/172 cut-off events. [2025-02-06 12:32:01,662 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2025-02-06 12:32:01,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 172 events. 26/172 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 226 event pairs, 9 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 528. Up to 40 conditions per place. [2025-02-06 12:32:01,663 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2025-02-06 12:32:01,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 56 transitions, 443 flow [2025-02-06 12:32:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 12:32:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 12:32:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2025-02-06 12:32:01,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5599173553719008 [2025-02-06 12:32:01,664 INFO L175 Difference]: Start difference. First operand has 81 places, 48 transitions, 345 flow. Second operand 11 states and 271 transitions. [2025-02-06 12:32:01,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 56 transitions, 443 flow [2025-02-06 12:32:01,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 56 transitions, 419 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-02-06 12:32:01,666 INFO L231 Difference]: Finished difference. Result has 85 places, 48 transitions, 349 flow [2025-02-06 12:32:01,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=349, PETRI_PLACES=85, PETRI_TRANSITIONS=48} [2025-02-06 12:32:01,667 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2025-02-06 12:32:01,667 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 48 transitions, 349 flow [2025-02-06 12:32:01,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.615384615384617) internal successors, (614), 26 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:01,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:01,667 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:01,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 12:32:01,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:01,868 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:01,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1113818850, now seen corresponding path program 6 times [2025-02-06 12:32:01,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:01,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15244356] [2025-02-06 12:32:01,868 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 12:32:01,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:01,893 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 66 statements into 7 equivalence classes. [2025-02-06 12:32:01,915 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 66 of 66 statements. [2025-02-06 12:32:01,915 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-06 12:32:01,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:03,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:03,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15244356] [2025-02-06 12:32:03,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15244356] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:03,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042543040] [2025-02-06 12:32:03,277 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 12:32:03,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:03,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:03,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 12:32:03,336 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 66 statements into 7 equivalence classes. [2025-02-06 12:32:03,364 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 66 of 66 statements. [2025-02-06 12:32:03,364 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-06 12:32:03,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:03,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 12:32:03,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:03,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 12:32:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:03,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:04,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042543040] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:04,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:04,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 33 [2025-02-06 12:32:04,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677738069] [2025-02-06 12:32:04,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:04,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-06 12:32:04,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:04,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-06 12:32:04,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2025-02-06 12:32:05,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2025-02-06 12:32:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 48 transitions, 349 flow. Second operand has 34 states, 34 states have (on average 20.58823529411765) internal successors, (700), 34 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:05,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:05,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2025-02-06 12:32:05,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:06,293 INFO L124 PetriNetUnfolderBase]: 41/191 cut-off events. [2025-02-06 12:32:06,293 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2025-02-06 12:32:06,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 191 events. 41/191 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 223 event pairs, 8 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 599. Up to 39 conditions per place. [2025-02-06 12:32:06,294 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 49 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2025-02-06 12:32:06,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 71 transitions, 570 flow [2025-02-06 12:32:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 12:32:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 12:32:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 319 transitions. [2025-02-06 12:32:06,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-02-06 12:32:06,297 INFO L175 Difference]: Start difference. First operand has 85 places, 48 transitions, 349 flow. Second operand 15 states and 319 transitions. [2025-02-06 12:32:06,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 71 transitions, 570 flow [2025-02-06 12:32:06,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 71 transitions, 542 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-02-06 12:32:06,301 INFO L231 Difference]: Finished difference. Result has 92 places, 48 transitions, 359 flow [2025-02-06 12:32:06,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=359, PETRI_PLACES=92, PETRI_TRANSITIONS=48} [2025-02-06 12:32:06,302 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2025-02-06 12:32:06,302 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 48 transitions, 359 flow [2025-02-06 12:32:06,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.58823529411765) internal successors, (700), 34 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:06,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:06,302 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:06,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:06,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 12:32:06,503 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:06,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:06,503 INFO L85 PathProgramCache]: Analyzing trace with hash -753793510, now seen corresponding path program 3 times [2025-02-06 12:32:06,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:06,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255023962] [2025-02-06 12:32:06,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:32:06,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:06,509 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 9 equivalence classes. [2025-02-06 12:32:06,511 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 68 statements. [2025-02-06 12:32:06,511 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 12:32:06,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-06 12:32:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:06,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255023962] [2025-02-06 12:32:06,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255023962] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:06,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584493588] [2025-02-06 12:32:06,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:32:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:06,624 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:06,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 12:32:06,670 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 9 equivalence classes. [2025-02-06 12:32:06,683 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 68 statements. [2025-02-06 12:32:06,683 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 12:32:06,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:06,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 12:32:06,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:06,729 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:32:06,729 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 14 treesize of output 13 [2025-02-06 12:32:06,738 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:32:06,738 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 [2025-02-06 12:32:07,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:32:07,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-02-06 12:32:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-06 12:32:07,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-06 12:32:08,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584493588] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:08,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:08,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2025-02-06 12:32:08,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110096114] [2025-02-06 12:32:08,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:08,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 12:32:08,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:08,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 12:32:08,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2025-02-06 12:32:09,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2025-02-06 12:32:09,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 48 transitions, 359 flow. Second operand has 21 states, 21 states have (on average 18.714285714285715) internal successors, (393), 21 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:09,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:09,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2025-02-06 12:32:09,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:09,538 INFO L124 PetriNetUnfolderBase]: 50/198 cut-off events. [2025-02-06 12:32:09,538 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2025-02-06 12:32:09,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 198 events. 50/198 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 224 event pairs, 2 based on Foata normal form. 2/199 useless extension candidates. Maximal degree in co-relation 623. Up to 72 conditions per place. [2025-02-06 12:32:09,539 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 25 selfloop transitions, 23 changer transitions 0/55 dead transitions. [2025-02-06 12:32:09,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 55 transitions, 455 flow [2025-02-06 12:32:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 12:32:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 12:32:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2025-02-06 12:32:09,540 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2025-02-06 12:32:09,540 INFO L175 Difference]: Start difference. First operand has 92 places, 48 transitions, 359 flow. Second operand 9 states and 177 transitions. [2025-02-06 12:32:09,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 55 transitions, 455 flow [2025-02-06 12:32:09,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 55 transitions, 393 flow, removed 6 selfloop flow, removed 20 redundant places. [2025-02-06 12:32:09,543 INFO L231 Difference]: Finished difference. Result has 79 places, 48 transitions, 329 flow [2025-02-06 12:32:09,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=329, PETRI_PLACES=79, PETRI_TRANSITIONS=48} [2025-02-06 12:32:09,543 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2025-02-06 12:32:09,543 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 48 transitions, 329 flow [2025-02-06 12:32:09,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 18.714285714285715) internal successors, (393), 21 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:09,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:09,543 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:09,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:09,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 12:32:09,748 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:09,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash 371262192, now seen corresponding path program 1 times [2025-02-06 12:32:09,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:09,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272728554] [2025-02-06 12:32:09,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:09,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-02-06 12:32:09,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-02-06 12:32:09,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:09,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:10,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:10,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272728554] [2025-02-06 12:32:10,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272728554] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:10,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253906224] [2025-02-06 12:32:10,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:10,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:10,832 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:10,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 12:32:10,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-02-06 12:32:10,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-02-06 12:32:10,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:10,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:10,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-06 12:32:10,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:11,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:32:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:32:11,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2025-02-06 12:32:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:32:11,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2025-02-06 12:32:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:32:11,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2025-02-06 12:32:11,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:32:11,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2025-02-06 12:32:11,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:32:11,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2025-02-06 12:32:11,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:32:11,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2025-02-06 12:32:11,417 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2025-02-06 12:32:11,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2025-02-06 12:32:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 141 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:11,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:13,508 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_126| Int)) (or (forall ((v_ArrVal_294 Int)) (= 66 (select (select (store |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| (store (select |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_126| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_294)) c_~v~0.base) c_~v~0.offset))) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_126| (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1| 1)))) is different from false [2025-02-06 12:33:02,885 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_127| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_126| Int) (v_ArrVal_288 Int) (v_ArrVal_294 Int) (v_ArrVal_292 Int) (v_ArrVal_290 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_128| Int)) (or (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_127| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_128| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_128| (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_126| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_127| 1)) (= (select (select (store |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| (store (store (store (store (select |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1|) v_ArrVal_288) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_128| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_290) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_127| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_292) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_126| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_294)) c_~v~0.base) c_~v~0.offset) 66))) is different from false [2025-02-06 12:33:06,996 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_129| Int)) (or (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_129| (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1| 1)) (forall ((|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_127| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_126| Int) (v_ArrVal_288 Int) (v_ArrVal_294 Int) (v_ArrVal_292 Int) (v_ArrVal_290 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_128| Int)) (or (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_127| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_128| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_128| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_129| 1)) (= 66 (select (select (store |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| (store (store (store (store (select |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_129| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_288) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_128| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_290) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_127| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_292) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_126| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_294)) c_~v~0.base) c_~v~0.offset)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_126| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_127| 1)))))) is different from false