./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 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/weaver/chl-chromosome-subst.wvr.c -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 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:01:55,594 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:01:55,647 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:01:55,651 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:01:55,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:01:55,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:01:55,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:01:55,668 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:01:55,668 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:01:55,669 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:01:55,669 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:01:55,669 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:01:55,670 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:01:55,670 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:01:55,670 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:01:55,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:01:55,670 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:01:55,670 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:01:55,671 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:01:55,671 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:01:55,672 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:01:55,672 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:01:55,672 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:01:55,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:01:55,672 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:01:55,672 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:01:55,673 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:01:55,673 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:01:55,673 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 -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2025-01-10 01:01:55,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:01:55,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:01:55,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:01:55,934 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:01:55,934 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:01:55,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2025-01-10 01:01:57,087 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/417461417/4cafe3a9d4d64313bcd4b9ad21e7c651/FLAG4b7288de5 [2025-01-10 01:01:57,358 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:01:57,359 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2025-01-10 01:01:57,365 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/417461417/4cafe3a9d4d64313bcd4b9ad21e7c651/FLAG4b7288de5 [2025-01-10 01:01:57,646 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/417461417/4cafe3a9d4d64313bcd4b9ad21e7c651 [2025-01-10 01:01:57,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:01:57,649 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:01:57,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:01:57,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:01:57,653 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:01:57,653 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,654 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612771ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57, skipping insertion in model container [2025-01-10 01:01:57,654 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,667 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:01:57,801 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-10 01:01:57,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:01:57,817 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:01:57,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:01:57,860 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:01:57,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57 WrapperNode [2025-01-10 01:01:57,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:01:57,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:01:57,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:01:57,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:01:57,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,874 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,898 INFO L138 Inliner]: procedures = 25, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 255 [2025-01-10 01:01:57,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:01:57,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:01:57,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:01:57,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:01:57,905 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,907 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,921 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-01-10 01:01:57,921 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,921 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,930 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,931 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,934 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,938 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:01:57,941 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:01:57,941 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:01:57,941 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:01:57,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (1/1) ... [2025-01-10 01:01:57,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:01:57,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:01:57,968 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) [2025-01-10 01:01:57,972 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 [2025-01-10 01:01:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:01:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:01:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:01:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:01:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:01:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-01-10 01:01:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-01-10 01:01:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:01:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:01:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:01:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:01:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:01:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:01:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:01:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:01:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:01:57,990 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 01:01:58,082 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:01:58,085 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:01:58,482 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:01:58,482 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:01:58,753 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:01:58,754 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:01:58,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:01:58 BoogieIcfgContainer [2025-01-10 01:01:58,755 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:01:58,756 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:01:58,756 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:01:58,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:01:58,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:01:57" (1/3) ... [2025-01-10 01:01:58,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9889fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:01:58, skipping insertion in model container [2025-01-10 01:01:58,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:01:57" (2/3) ... [2025-01-10 01:01:58,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9889fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:01:58, skipping insertion in model container [2025-01-10 01:01:58,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:01:58" (3/3) ... [2025-01-10 01:01:58,762 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2025-01-10 01:01:58,774 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:01:58,776 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-subst.wvr.c that has 4 procedures, 55 locations, 1 initial locations, 6 loop locations, and 20 error locations. [2025-01-10 01:01:58,776 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:01:58,840 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-01-10 01:01:58,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2025-01-10 01:01:58,898 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2025-01-10 01:01:58,900 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:01:58,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 140 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2025-01-10 01:01:58,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2025-01-10 01:01:58,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2025-01-10 01:01:58,915 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:01:58,929 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b22e409, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:01:58,929 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2025-01-10 01:01:58,931 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:01:58,931 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-10 01:01:58,931 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:01:58,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:58,932 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:01:58,932 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:01:58,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 842088, now seen corresponding path program 1 times [2025-01-10 01:01:58,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:58,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663048667] [2025-01-10 01:01:58,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:58,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:59,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:01:59,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:01:59,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:59,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:01:59,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:59,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663048667] [2025-01-10 01:01:59,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663048667] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:59,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:59,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:01:59,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114590713] [2025-01-10 01:01:59,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:59,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:01:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:59,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:01:59,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:01:59,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-01-10 01:01:59,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2025-01-10 01:01:59,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:59,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-01-10 01:01:59,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:59,410 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2025-01-10 01:01:59,411 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-01-10 01:01:59,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 443 events. 202/443 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2068 event pairs, 124 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 672. Up to 293 conditions per place. [2025-01-10 01:01:59,417 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2025-01-10 01:01:59,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2025-01-10 01:01:59,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:01:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:01:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2025-01-10 01:01:59,427 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-01-10 01:01:59,429 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2025-01-10 01:01:59,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2025-01-10 01:01:59,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:01:59,435 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2025-01-10 01:01:59,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2025-01-10 01:01:59,441 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2025-01-10 01:01:59,442 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2025-01-10 01:01:59,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2025-01-10 01:01:59,442 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:59,442 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:01:59,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:01:59,443 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:01:59,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash 842089, now seen corresponding path program 1 times [2025-01-10 01:01:59,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:59,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418084606] [2025-01-10 01:01:59,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:59,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:59,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:01:59,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:01:59,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:59,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:01:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:01:59,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:01:59,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418084606] [2025-01-10 01:01:59,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418084606] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:01:59,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:01:59,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:01:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517009244] [2025-01-10 01:01:59,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:01:59,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:01:59,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:01:59,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:01:59,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:01:59,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-01-10 01:01:59,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2025-01-10 01:01:59,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:01:59,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-01-10 01:01:59,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:01:59,819 INFO L124 PetriNetUnfolderBase]: 205/452 cut-off events. [2025-01-10 01:01:59,819 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:01:59,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 452 events. 205/452 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2105 event pairs, 124 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 734. Up to 306 conditions per place. [2025-01-10 01:01:59,824 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 34 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2025-01-10 01:01:59,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 214 flow [2025-01-10 01:01:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:01:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:01:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2025-01-10 01:01:59,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2025-01-10 01:01:59,826 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2025-01-10 01:01:59,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 214 flow [2025-01-10 01:01:59,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:01:59,828 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 166 flow [2025-01-10 01:01:59,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2025-01-10 01:01:59,829 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2025-01-10 01:01:59,829 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 166 flow [2025-01-10 01:01:59,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2025-01-10 01:01:59,829 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:01:59,829 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-01-10 01:01:59,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:01:59,829 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:01:59,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:01:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash 809274690, now seen corresponding path program 1 times [2025-01-10 01:01:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:01:59,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530616120] [2025-01-10 01:01:59,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:01:59,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:01:59,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:01:59,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:01:59,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:01:59,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:00,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530616120] [2025-01-10 01:02:00,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530616120] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:00,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832390447] [2025-01-10 01:02:00,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:00,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:00,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:00,034 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) [2025-01-10 01:02:00,035 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 [2025-01-10 01:02:00,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:02:00,090 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:02:00,090 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:00,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:00,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:02:00,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:00,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:00,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:00,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832390447] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:00,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:00,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-01-10 01:02:00,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456643588] [2025-01-10 01:02:00,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:00,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:02:00,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:00,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:02:00,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:02:00,386 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-01-10 01:02:00,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 166 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2025-01-10 01:02:00,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:00,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-01-10 01:02:00,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:00,648 INFO L124 PetriNetUnfolderBase]: 208/473 cut-off events. [2025-01-10 01:02:00,649 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-01-10 01:02:00,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 473 events. 208/473 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2130 event pairs, 124 based on Foata normal form. 6/395 useless extension candidates. Maximal degree in co-relation 766. Up to 307 conditions per place. [2025-01-10 01:02:00,654 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2025-01-10 01:02:00,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 368 flow [2025-01-10 01:02:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:02:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:02:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2025-01-10 01:02:00,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2025-01-10 01:02:00,656 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 166 flow. Second operand 6 states and 233 transitions. [2025-01-10 01:02:00,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 368 flow [2025-01-10 01:02:00,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:02:00,658 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 292 flow [2025-01-10 01:02:00,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2025-01-10 01:02:00,659 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2025-01-10 01:02:00,659 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 292 flow [2025-01-10 01:02:00,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2025-01-10 01:02:00,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:00,659 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-01-10 01:02:00,666 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 [2025-01-10 01:02:00,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:00,860 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:00,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1575254861, now seen corresponding path program 2 times [2025-01-10 01:02:00,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:00,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849264099] [2025-01-10 01:02:00,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:00,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:00,867 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-01-10 01:02:00,874 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:02:00,874 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:02:00,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:01,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:01,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849264099] [2025-01-10 01:02:01,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849264099] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:01,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527296266] [2025-01-10 01:02:01,092 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:01,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:01,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:01,094 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) [2025-01-10 01:02:01,095 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 [2025-01-10 01:02:01,136 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-01-10 01:02:01,147 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:02:01,147 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:02:01,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:01,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-10 01:02:01,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:01,163 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 [2025-01-10 01:02:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:01,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:01,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527296266] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:01,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:01,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2025-01-10 01:02:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165118343] [2025-01-10 01:02:01,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:01,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 01:02:01,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:01,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 01:02:01,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2025-01-10 01:02:01,911 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-01-10 01:02:01,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 292 flow. Second operand has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 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) [2025-01-10 01:02:01,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:01,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-01-10 01:02:01,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:02,317 INFO L124 PetriNetUnfolderBase]: 208/470 cut-off events. [2025-01-10 01:02:02,317 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2025-01-10 01:02:02,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 470 events. 208/470 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2119 event pairs, 124 based on Foata normal form. 3/392 useless extension candidates. Maximal degree in co-relation 798. Up to 295 conditions per place. [2025-01-10 01:02:02,320 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 22 selfloop transitions, 37 changer transitions 0/78 dead transitions. [2025-01-10 01:02:02,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 404 flow [2025-01-10 01:02:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:02:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:02:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 348 transitions. [2025-01-10 01:02:02,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2025-01-10 01:02:02,322 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 292 flow. Second operand 11 states and 348 transitions. [2025-01-10 01:02:02,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 404 flow [2025-01-10 01:02:02,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 330 flow, removed 15 selfloop flow, removed 5 redundant places. [2025-01-10 01:02:02,324 INFO L231 Difference]: Finished difference. Result has 61 places, 78 transitions, 292 flow [2025-01-10 01:02:02,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=292, PETRI_PLACES=61, PETRI_TRANSITIONS=78} [2025-01-10 01:02:02,325 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2025-01-10 01:02:02,325 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 78 transitions, 292 flow [2025-01-10 01:02:02,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 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) [2025-01-10 01:02:02,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:02,326 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:02,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-10 01:02:02,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:02,527 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:02,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -715652188, now seen corresponding path program 1 times [2025-01-10 01:02:02,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:02,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116028538] [2025-01-10 01:02:02,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:02,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:02,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:02:02,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:02:02,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:02,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:02:02,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:02,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116028538] [2025-01-10 01:02:02,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116028538] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:02,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937795463] [2025-01-10 01:02:02,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:02,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:02,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:02,633 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) [2025-01-10 01:02:02,634 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 [2025-01-10 01:02:02,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:02:02,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:02:02,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:02,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:02,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:02:02,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:02:02,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:02:02,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937795463] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:02,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:02,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-01-10 01:02:02,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153437833] [2025-01-10 01:02:02,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:02,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 01:02:02,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:02,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 01:02:02,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:02:02,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-01-10 01:02:02,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 78 transitions, 292 flow. Second operand has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 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) [2025-01-10 01:02:02,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:02,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-01-10 01:02:02,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:02,935 INFO L124 PetriNetUnfolderBase]: 202/467 cut-off events. [2025-01-10 01:02:02,936 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:02:02,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 467 events. 202/467 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2077 event pairs, 124 based on Foata normal form. 9/395 useless extension candidates. Maximal degree in co-relation 734. Up to 296 conditions per place. [2025-01-10 01:02:02,938 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 35 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2025-01-10 01:02:02,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 380 flow [2025-01-10 01:02:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:02:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:02:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2025-01-10 01:02:02,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2025-01-10 01:02:02,939 INFO L175 Difference]: Start difference. First operand has 61 places, 78 transitions, 292 flow. Second operand 7 states and 268 transitions. [2025-01-10 01:02:02,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 380 flow [2025-01-10 01:02:02,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 340 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:02,941 INFO L231 Difference]: Finished difference. Result has 63 places, 75 transitions, 296 flow [2025-01-10 01:02:02,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=63, PETRI_TRANSITIONS=75} [2025-01-10 01:02:02,942 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2025-01-10 01:02:02,942 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 75 transitions, 296 flow [2025-01-10 01:02:02,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 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) [2025-01-10 01:02:02,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:02,943 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:02,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-10 01:02:03,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:03,147 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:03,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1442878685, now seen corresponding path program 1 times [2025-01-10 01:02:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:03,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420355938] [2025-01-10 01:02:03,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:03,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:03,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-10 01:02:03,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-10 01:02:03,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:03,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-01-10 01:02:03,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:03,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420355938] [2025-01-10 01:02:03,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420355938] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:03,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785601748] [2025-01-10 01:02:03,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:03,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:03,796 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) [2025-01-10 01:02:03,797 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 [2025-01-10 01:02:03,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-10 01:02:03,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-10 01:02:03,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:03,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:03,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-01-10 01:02:03,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:03,922 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 [2025-01-10 01:02:03,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:03,992 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:03,992 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 [2025-01-10 01:02:03,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 01:02:04,252 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2025-01-10 01:02:04,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2025-01-10 01:02:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:04,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:05,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785601748] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:05,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 25 [2025-01-10 01:02:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670331579] [2025-01-10 01:02:05,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:05,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:02:05,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:05,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:02:05,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2025-01-10 01:02:05,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-01-10 01:02:05,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 296 flow. Second operand has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 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) [2025-01-10 01:02:05,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:05,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-01-10 01:02:05,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:06,106 INFO L124 PetriNetUnfolderBase]: 459/939 cut-off events. [2025-01-10 01:02:06,106 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:02:06,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 939 events. 459/939 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4883 event pairs, 169 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 1600. Up to 351 conditions per place. [2025-01-10 01:02:06,111 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 69 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2025-01-10 01:02:06,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 485 flow [2025-01-10 01:02:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:02:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:02:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2025-01-10 01:02:06,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2025-01-10 01:02:06,112 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 296 flow. Second operand 6 states and 211 transitions. [2025-01-10 01:02:06,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 485 flow [2025-01-10 01:02:06,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 452 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-01-10 01:02:06,114 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 288 flow [2025-01-10 01:02:06,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2025-01-10 01:02:06,114 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2025-01-10 01:02:06,114 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 288 flow [2025-01-10 01:02:06,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 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) [2025-01-10 01:02:06,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:06,114 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:06,121 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 [2025-01-10 01:02:06,319 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,SelfDestructingSolverStorable5 [2025-01-10 01:02:06,319 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:06,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1442878686, now seen corresponding path program 2 times [2025-01-10 01:02:06,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:06,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510886765] [2025-01-10 01:02:06,319 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:06,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:06,329 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-01-10 01:02:06,339 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 38 statements. [2025-01-10 01:02:06,339 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:02:06,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-01-10 01:02:06,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:06,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510886765] [2025-01-10 01:02:06,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510886765] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:06,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:06,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:02:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485594423] [2025-01-10 01:02:06,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:06,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:02:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:06,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:02:06,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:02:06,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2025-01-10 01:02:06,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2025-01-10 01:02:06,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:06,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2025-01-10 01:02:06,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:06,567 INFO L124 PetriNetUnfolderBase]: 526/1138 cut-off events. [2025-01-10 01:02:06,567 INFO L125 PetriNetUnfolderBase]: For 361/373 co-relation queries the response was YES. [2025-01-10 01:02:06,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2281 conditions, 1138 events. 526/1138 cut-off events. For 361/373 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6830 event pairs, 377 based on Foata normal form. 67/1042 useless extension candidates. Maximal degree in co-relation 2149. Up to 762 conditions per place. [2025-01-10 01:02:06,573 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 56 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2025-01-10 01:02:06,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 402 flow [2025-01-10 01:02:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:02:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:02:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2025-01-10 01:02:06,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2025-01-10 01:02:06,574 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 288 flow. Second operand 5 states and 143 transitions. [2025-01-10 01:02:06,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 402 flow [2025-01-10 01:02:06,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 394 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:06,576 INFO L231 Difference]: Finished difference. Result has 63 places, 74 transitions, 282 flow [2025-01-10 01:02:06,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=63, PETRI_TRANSITIONS=74} [2025-01-10 01:02:06,576 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2025-01-10 01:02:06,577 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 74 transitions, 282 flow [2025-01-10 01:02:06,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2025-01-10 01:02:06,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:06,577 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:06,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-10 01:02:06,577 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:06,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1779565472, now seen corresponding path program 1 times [2025-01-10 01:02:06,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:06,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014060102] [2025-01-10 01:02:06,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:06,595 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-10 01:02:06,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-10 01:02:06,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:06,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-10 01:02:06,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:06,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014060102] [2025-01-10 01:02:06,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014060102] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:06,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:06,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:02:06,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345616585] [2025-01-10 01:02:06,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:06,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:02:06,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:06,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:02:06,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:02:06,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2025-01-10 01:02:06,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 74 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2025-01-10 01:02:06,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:06,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2025-01-10 01:02:06,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:06,906 INFO L124 PetriNetUnfolderBase]: 400/787 cut-off events. [2025-01-10 01:02:06,906 INFO L125 PetriNetUnfolderBase]: For 142/169 co-relation queries the response was YES. [2025-01-10 01:02:06,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1601 conditions, 787 events. 400/787 cut-off events. For 142/169 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3708 event pairs, 299 based on Foata normal form. 29/763 useless extension candidates. Maximal degree in co-relation 1469. Up to 592 conditions per place. [2025-01-10 01:02:06,909 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 54 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2025-01-10 01:02:06,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 392 flow [2025-01-10 01:02:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:02:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:02:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-01-10 01:02:06,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2025-01-10 01:02:06,911 INFO L175 Difference]: Start difference. First operand has 63 places, 74 transitions, 282 flow. Second operand 5 states and 147 transitions. [2025-01-10 01:02:06,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 392 flow [2025-01-10 01:02:06,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:02:06,912 INFO L231 Difference]: Finished difference. Result has 62 places, 72 transitions, 279 flow [2025-01-10 01:02:06,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=62, PETRI_TRANSITIONS=72} [2025-01-10 01:02:06,913 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2025-01-10 01:02:06,913 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 72 transitions, 279 flow [2025-01-10 01:02:06,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2025-01-10 01:02:06,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:06,913 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:06,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-10 01:02:06,913 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:06,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:06,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1779565471, now seen corresponding path program 1 times [2025-01-10 01:02:06,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:06,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118814639] [2025-01-10 01:02:06,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:06,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:06,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-10 01:02:06,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-10 01:02:06,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:06,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:07,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:07,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118814639] [2025-01-10 01:02:07,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118814639] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:07,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547063745] [2025-01-10 01:02:07,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:07,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:07,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:07,280 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) [2025-01-10 01:02:07,281 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 [2025-01-10 01:02:07,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-10 01:02:07,380 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-10 01:02:07,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:07,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:07,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:02:07,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:07,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:07,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:02:07,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-10 01:02:07,500 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:07,501 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 [2025-01-10 01:02:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:07,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:07,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-01-10 01:02:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:07,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547063745] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:07,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:07,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-01-10 01:02:07,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025908759] [2025-01-10 01:02:07,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:07,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-10 01:02:07,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:07,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-10 01:02:07,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2025-01-10 01:02:08,577 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-01-10 01:02:08,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 72 transitions, 279 flow. Second operand has 26 states, 26 states have (on average 27.192307692307693) internal successors, (707), 26 states have internal predecessors, (707), 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) [2025-01-10 01:02:08,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:08,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-01-10 01:02:08,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:09,146 INFO L124 PetriNetUnfolderBase]: 539/1067 cut-off events. [2025-01-10 01:02:09,147 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2025-01-10 01:02:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 1067 events. 539/1067 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5344 event pairs, 169 based on Foata normal form. 52/1049 useless extension candidates. Maximal degree in co-relation 2119. Up to 377 conditions per place. [2025-01-10 01:02:09,152 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 72 selfloop transitions, 19 changer transitions 0/106 dead transitions. [2025-01-10 01:02:09,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 545 flow [2025-01-10 01:02:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-10 01:02:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-01-10 01:02:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 465 transitions. [2025-01-10 01:02:09,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-01-10 01:02:09,155 INFO L175 Difference]: Start difference. First operand has 62 places, 72 transitions, 279 flow. Second operand 15 states and 465 transitions. [2025-01-10 01:02:09,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 545 flow [2025-01-10 01:02:09,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 540 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:02:09,159 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 332 flow [2025-01-10 01:02:09,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=332, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2025-01-10 01:02:09,160 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2025-01-10 01:02:09,160 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 332 flow [2025-01-10 01:02:09,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 27.192307692307693) internal successors, (707), 26 states have internal predecessors, (707), 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) [2025-01-10 01:02:09,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:09,161 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:09,168 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 [2025-01-10 01:02:09,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:09,362 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:09,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:09,363 INFO L85 PathProgramCache]: Analyzing trace with hash 619105366, now seen corresponding path program 1 times [2025-01-10 01:02:09,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:09,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010385202] [2025-01-10 01:02:09,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:09,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:09,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-10 01:02:09,388 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-10 01:02:09,388 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:09,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-01-10 01:02:09,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010385202] [2025-01-10 01:02:09,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010385202] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496062387] [2025-01-10 01:02:09,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:09,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:09,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:09,854 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) [2025-01-10 01:02:09,855 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 [2025-01-10 01:02:09,920 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-10 01:02:09,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-10 01:02:09,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:09,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:09,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-01-10 01:02:09,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:09,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:09,967 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 [2025-01-10 01:02:10,043 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:10,043 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 [2025-01-10 01:02:10,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 01:02:10,246 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2025-01-10 01:02:10,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2025-01-10 01:02:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:10,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:11,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496062387] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:11,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:11,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9] total 26 [2025-01-10 01:02:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476163852] [2025-01-10 01:02:11,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:11,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:02:11,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:11,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:02:11,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2025-01-10 01:02:11,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-01-10 01:02:11,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 332 flow. Second operand has 11 states, 11 states have (on average 29.09090909090909) internal successors, (320), 11 states have internal predecessors, (320), 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) [2025-01-10 01:02:11,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:11,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-01-10 01:02:11,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:11,819 INFO L124 PetriNetUnfolderBase]: 1093/2062 cut-off events. [2025-01-10 01:02:11,819 INFO L125 PetriNetUnfolderBase]: For 1407/1460 co-relation queries the response was YES. [2025-01-10 01:02:11,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4593 conditions, 2062 events. 1093/2062 cut-off events. For 1407/1460 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12524 event pairs, 458 based on Foata normal form. 0/1795 useless extension candidates. Maximal degree in co-relation 4446. Up to 853 conditions per place. [2025-01-10 01:02:11,827 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 71 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2025-01-10 01:02:11,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 548 flow [2025-01-10 01:02:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:02:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:02:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2025-01-10 01:02:11,829 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2025-01-10 01:02:11,829 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 332 flow. Second operand 6 states and 209 transitions. [2025-01-10 01:02:11,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 548 flow [2025-01-10 01:02:11,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 547 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:02:11,831 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 356 flow [2025-01-10 01:02:11,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2025-01-10 01:02:11,831 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2025-01-10 01:02:11,831 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 356 flow [2025-01-10 01:02:11,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.09090909090909) internal successors, (320), 11 states have internal predecessors, (320), 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) [2025-01-10 01:02:11,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:11,832 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:11,837 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 [2025-01-10 01:02:12,033 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,SelfDestructingSolverStorable9 [2025-01-10 01:02:12,033 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:12,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2012397974, now seen corresponding path program 1 times [2025-01-10 01:02:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:12,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052298859] [2025-01-10 01:02:12,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:12,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:12,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:12,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:12,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-10 01:02:12,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:12,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052298859] [2025-01-10 01:02:12,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052298859] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:12,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:12,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:02:12,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837830096] [2025-01-10 01:02:12,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:12,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:02:12,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:12,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:02:12,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:02:12,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2025-01-10 01:02:12,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 356 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2025-01-10 01:02:12,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:12,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2025-01-10 01:02:12,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:12,266 INFO L124 PetriNetUnfolderBase]: 733/1475 cut-off events. [2025-01-10 01:02:12,266 INFO L125 PetriNetUnfolderBase]: For 1440/1521 co-relation queries the response was YES. [2025-01-10 01:02:12,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3580 conditions, 1475 events. 733/1475 cut-off events. For 1440/1521 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8654 event pairs, 590 based on Foata normal form. 51/1418 useless extension candidates. Maximal degree in co-relation 3429. Up to 1093 conditions per place. [2025-01-10 01:02:12,275 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 56 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-01-10 01:02:12,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 73 transitions, 468 flow [2025-01-10 01:02:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:02:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:02:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2025-01-10 01:02:12,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2025-01-10 01:02:12,276 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 356 flow. Second operand 4 states and 127 transitions. [2025-01-10 01:02:12,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 73 transitions, 468 flow [2025-01-10 01:02:12,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:12,278 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 348 flow [2025-01-10 01:02:12,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2025-01-10 01:02:12,278 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2025-01-10 01:02:12,278 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 348 flow [2025-01-10 01:02:12,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2025-01-10 01:02:12,280 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:12,280 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:12,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-01-10 01:02:12,280 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:12,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:12,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2012397975, now seen corresponding path program 1 times [2025-01-10 01:02:12,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:12,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262640816] [2025-01-10 01:02:12,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:12,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:12,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:12,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:12,306 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:12,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-10 01:02:12,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:12,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262640816] [2025-01-10 01:02:12,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262640816] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:12,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582813951] [2025-01-10 01:02:12,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:12,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:12,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:12,513 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) [2025-01-10 01:02:12,515 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 [2025-01-10 01:02:12,579 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:12,612 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:12,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:12,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:12,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-01-10 01:02:12,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:12,624 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 [2025-01-10 01:02:12,723 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-10 01:02:12,724 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 [2025-01-10 01:02:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:12,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-01-10 01:02:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582813951] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:12,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:12,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 10] total 15 [2025-01-10 01:02:12,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908749851] [2025-01-10 01:02:12,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:12,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:02:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:12,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:02:12,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:02:12,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:02:12,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:12,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:12,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:02:12,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:13,124 INFO L124 PetriNetUnfolderBase]: 942/1753 cut-off events. [2025-01-10 01:02:13,124 INFO L125 PetriNetUnfolderBase]: For 1449/1494 co-relation queries the response was YES. [2025-01-10 01:02:13,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4366 conditions, 1753 events. 942/1753 cut-off events. For 1449/1494 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10013 event pairs, 458 based on Foata normal form. 65/1702 useless extension candidates. Maximal degree in co-relation 4216. Up to 918 conditions per place. [2025-01-10 01:02:13,133 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 72 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2025-01-10 01:02:13,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 90 transitions, 565 flow [2025-01-10 01:02:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:02:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:02:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2025-01-10 01:02:13,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-01-10 01:02:13,134 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 348 flow. Second operand 5 states and 186 transitions. [2025-01-10 01:02:13,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 90 transitions, 565 flow [2025-01-10 01:02:13,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 562 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:02:13,136 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 364 flow [2025-01-10 01:02:13,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=364, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2025-01-10 01:02:13,139 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2025-01-10 01:02:13,140 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 364 flow [2025-01-10 01:02:13,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:13,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:13,140 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:13,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-10 01:02:13,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:13,341 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:13,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash -765405338, now seen corresponding path program 1 times [2025-01-10 01:02:13,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:13,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625589265] [2025-01-10 01:02:13,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:13,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:13,353 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:13,370 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:13,370 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:13,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-01-10 01:02:13,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:13,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625589265] [2025-01-10 01:02:13,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625589265] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:13,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258048992] [2025-01-10 01:02:13,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:13,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:13,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:13,755 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) [2025-01-10 01:02:13,757 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 [2025-01-10 01:02:13,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:13,856 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:13,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:13,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:13,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-01-10 01:02:13,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:13,865 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 [2025-01-10 01:02:13,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:13,934 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-10 01:02:13,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-01-10 01:02:13,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 01:02:13,998 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-10 01:02:13,998 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 [2025-01-10 01:02:14,011 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:14,012 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 [2025-01-10 01:02:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:14,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258048992] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:14,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:14,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2025-01-10 01:02:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890723949] [2025-01-10 01:02:14,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:14,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-10 01:02:14,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:14,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-10 01:02:14,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2025-01-10 01:02:15,830 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2025-01-10 01:02:15,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 364 flow. Second operand has 30 states, 30 states have (on average 23.166666666666668) internal successors, (695), 30 states have internal predecessors, (695), 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) [2025-01-10 01:02:15,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:15,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2025-01-10 01:02:15,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:16,702 INFO L124 PetriNetUnfolderBase]: 2404/4034 cut-off events. [2025-01-10 01:02:16,703 INFO L125 PetriNetUnfolderBase]: For 4742/4954 co-relation queries the response was YES. [2025-01-10 01:02:16,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10888 conditions, 4034 events. 2404/4034 cut-off events. For 4742/4954 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 22765 event pairs, 431 based on Foata normal form. 174/4147 useless extension candidates. Maximal degree in co-relation 10737. Up to 795 conditions per place. [2025-01-10 01:02:16,726 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 126 selfloop transitions, 18 changer transitions 0/154 dead transitions. [2025-01-10 01:02:16,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 154 transitions, 934 flow [2025-01-10 01:02:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:02:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:02:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 399 transitions. [2025-01-10 01:02:16,728 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5115384615384615 [2025-01-10 01:02:16,728 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 364 flow. Second operand 13 states and 399 transitions. [2025-01-10 01:02:16,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 154 transitions, 934 flow [2025-01-10 01:02:16,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 920 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:02:16,732 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 425 flow [2025-01-10 01:02:16,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=425, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2025-01-10 01:02:16,733 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 34 predicate places. [2025-01-10 01:02:16,733 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 425 flow [2025-01-10 01:02:16,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 23.166666666666668) internal successors, (695), 30 states have internal predecessors, (695), 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) [2025-01-10 01:02:16,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:16,733 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:16,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 01:02:16,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:16,934 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:16,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2082111202, now seen corresponding path program 1 times [2025-01-10 01:02:16,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:16,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239245855] [2025-01-10 01:02:16,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:16,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:16,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-10 01:02:16,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:02:16,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:16,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:17,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:17,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239245855] [2025-01-10 01:02:17,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239245855] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:17,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138511497] [2025-01-10 01:02:17,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:17,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:17,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:17,226 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) [2025-01-10 01:02:17,228 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 [2025-01-10 01:02:17,302 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-10 01:02:17,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:02:17,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:17,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:17,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:02:17,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:17,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:02:17,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-10 01:02:17,462 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:17,462 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 [2025-01-10 01:02:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:17,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:17,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-01-10 01:02:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:17,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138511497] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:17,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:17,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-01-10 01:02:17,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644753292] [2025-01-10 01:02:17,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:17,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-10 01:02:17,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:17,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-10 01:02:17,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2025-01-10 01:02:21,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-01-10 01:02:25,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-01-10 01:02:30,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-01-10 01:02:30,360 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2025-01-10 01:02:30,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 425 flow. Second operand has 26 states, 26 states have (on average 23.653846153846153) internal successors, (615), 26 states have internal predecessors, (615), 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) [2025-01-10 01:02:30,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:30,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2025-01-10 01:02:30,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:31,085 INFO L124 PetriNetUnfolderBase]: 3486/5972 cut-off events. [2025-01-10 01:02:31,086 INFO L125 PetriNetUnfolderBase]: For 10904/11614 co-relation queries the response was YES. [2025-01-10 01:02:31,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16516 conditions, 5972 events. 3486/5972 cut-off events. For 10904/11614 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 38910 event pairs, 1256 based on Foata normal form. 0/5771 useless extension candidates. Maximal degree in co-relation 16351. Up to 2119 conditions per place. [2025-01-10 01:02:31,117 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 77 selfloop transitions, 20 changer transitions 0/111 dead transitions. [2025-01-10 01:02:31,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 111 transitions, 819 flow [2025-01-10 01:02:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-10 01:02:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-01-10 01:02:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 399 transitions. [2025-01-10 01:02:31,121 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44333333333333336 [2025-01-10 01:02:31,121 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 425 flow. Second operand 15 states and 399 transitions. [2025-01-10 01:02:31,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 111 transitions, 819 flow [2025-01-10 01:02:31,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 111 transitions, 785 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-01-10 01:02:31,126 INFO L231 Difference]: Finished difference. Result has 106 places, 78 transitions, 470 flow [2025-01-10 01:02:31,126 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=470, PETRI_PLACES=106, PETRI_TRANSITIONS=78} [2025-01-10 01:02:31,127 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 46 predicate places. [2025-01-10 01:02:31,127 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 78 transitions, 470 flow [2025-01-10 01:02:31,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.653846153846153) internal successors, (615), 26 states have internal predecessors, (615), 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) [2025-01-10 01:02:31,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:31,127 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:31,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 01:02:31,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:31,328 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:31,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1179199548, now seen corresponding path program 1 times [2025-01-10 01:02:31,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:31,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437543640] [2025-01-10 01:02:31,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:31,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-10 01:02:31,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-10 01:02:31,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:31,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-01-10 01:02:31,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:31,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437543640] [2025-01-10 01:02:31,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437543640] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:31,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926399423] [2025-01-10 01:02:31,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:31,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:31,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:31,682 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) [2025-01-10 01:02:31,683 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 [2025-01-10 01:02:31,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-10 01:02:31,791 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-10 01:02:31,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:31,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:31,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-01-10 01:02:31,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:31,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:31,838 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-10 01:02:31,838 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 12 treesize of output 14 [2025-01-10 01:02:32,011 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2025-01-10 01:02:32,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2025-01-10 01:02:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:32,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926399423] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:32,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:32,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2025-01-10 01:02:32,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791578196] [2025-01-10 01:02:32,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:32,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-10 01:02:32,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:32,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-10 01:02:32,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2025-01-10 01:02:33,355 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2025-01-10 01:02:33,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 78 transitions, 470 flow. Second operand has 30 states, 30 states have (on average 23.366666666666667) internal successors, (701), 30 states have internal predecessors, (701), 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) [2025-01-10 01:02:33,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:33,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2025-01-10 01:02:33,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:35,064 INFO L124 PetriNetUnfolderBase]: 7539/13416 cut-off events. [2025-01-10 01:02:35,064 INFO L125 PetriNetUnfolderBase]: For 19594/20405 co-relation queries the response was YES. [2025-01-10 01:02:35,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38161 conditions, 13416 events. 7539/13416 cut-off events. For 19594/20405 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 104129 event pairs, 1664 based on Foata normal form. 633/13891 useless extension candidates. Maximal degree in co-relation 37948. Up to 2596 conditions per place. [2025-01-10 01:02:35,137 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 120 selfloop transitions, 27 changer transitions 0/161 dead transitions. [2025-01-10 01:02:35,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 161 transitions, 1195 flow [2025-01-10 01:02:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-10 01:02:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-01-10 01:02:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 550 transitions. [2025-01-10 01:02:35,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-01-10 01:02:35,138 INFO L175 Difference]: Start difference. First operand has 106 places, 78 transitions, 470 flow. Second operand 20 states and 550 transitions. [2025-01-10 01:02:35,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 161 transitions, 1195 flow [2025-01-10 01:02:35,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 161 transitions, 1162 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-01-10 01:02:35,157 INFO L231 Difference]: Finished difference. Result has 119 places, 86 transitions, 578 flow [2025-01-10 01:02:35,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=578, PETRI_PLACES=119, PETRI_TRANSITIONS=86} [2025-01-10 01:02:35,157 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 59 predicate places. [2025-01-10 01:02:35,157 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 86 transitions, 578 flow [2025-01-10 01:02:35,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 23.366666666666667) internal successors, (701), 30 states have internal predecessors, (701), 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) [2025-01-10 01:02:35,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:35,158 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:35,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-10 01:02:35,362 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,SelfDestructingSolverStorable14 [2025-01-10 01:02:35,362 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:35,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash -120937000, now seen corresponding path program 1 times [2025-01-10 01:02:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:35,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736395207] [2025-01-10 01:02:35,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:35,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-10 01:02:35,379 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-10 01:02:35,379 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:35,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-10 01:02:35,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736395207] [2025-01-10 01:02:35,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736395207] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274879732] [2025-01-10 01:02:35,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:35,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:35,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:35,521 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) [2025-01-10 01:02:35,527 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 [2025-01-10 01:02:35,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-10 01:02:35,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-10 01:02:35,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:35,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:35,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 01:02:35,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:35,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:35,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-01-10 01:02:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:35,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274879732] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:35,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:35,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2025-01-10 01:02:35,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645504601] [2025-01-10 01:02:35,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:35,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 01:02:35,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:35,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 01:02:35,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2025-01-10 01:02:36,324 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:02:36,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 86 transitions, 578 flow. Second operand has 21 states, 21 states have (on average 30.61904761904762) internal successors, (643), 21 states have internal predecessors, (643), 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) [2025-01-10 01:02:36,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:36,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:02:36,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:37,566 INFO L124 PetriNetUnfolderBase]: 6006/11291 cut-off events. [2025-01-10 01:02:37,566 INFO L125 PetriNetUnfolderBase]: For 26676/28208 co-relation queries the response was YES. [2025-01-10 01:02:37,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34483 conditions, 11291 events. 6006/11291 cut-off events. For 26676/28208 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 90533 event pairs, 2903 based on Foata normal form. 644/11725 useless extension candidates. Maximal degree in co-relation 34260. Up to 4828 conditions per place. [2025-01-10 01:02:37,647 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 86 selfloop transitions, 20 changer transitions 0/123 dead transitions. [2025-01-10 01:02:37,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 123 transitions, 1034 flow [2025-01-10 01:02:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:02:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:02:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 362 transitions. [2025-01-10 01:02:37,649 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2025-01-10 01:02:37,649 INFO L175 Difference]: Start difference. First operand has 119 places, 86 transitions, 578 flow. Second operand 10 states and 362 transitions. [2025-01-10 01:02:37,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 123 transitions, 1034 flow [2025-01-10 01:02:37,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 1006 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-01-10 01:02:37,690 INFO L231 Difference]: Finished difference. Result has 123 places, 87 transitions, 610 flow [2025-01-10 01:02:37,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=610, PETRI_PLACES=123, PETRI_TRANSITIONS=87} [2025-01-10 01:02:37,692 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 63 predicate places. [2025-01-10 01:02:37,692 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 87 transitions, 610 flow [2025-01-10 01:02:37,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.61904761904762) internal successors, (643), 21 states have internal predecessors, (643), 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) [2025-01-10 01:02:37,692 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:37,692 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:37,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 01:02:37,893 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,SelfDestructingSolverStorable15 [2025-01-10 01:02:37,893 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:37,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:37,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2099518863, now seen corresponding path program 1 times [2025-01-10 01:02:37,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:37,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373990328] [2025-01-10 01:02:37,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:37,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:37,906 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-10 01:02:37,916 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-10 01:02:37,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:37,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-10 01:02:38,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:38,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373990328] [2025-01-10 01:02:38,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373990328] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:38,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830774840] [2025-01-10 01:02:38,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:38,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:38,168 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) [2025-01-10 01:02:38,170 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 [2025-01-10 01:02:38,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-10 01:02:38,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-10 01:02:38,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:38,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:38,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:02:38,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:38,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:38,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-01-10 01:02:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:38,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830774840] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:38,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:38,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 24 [2025-01-10 01:02:38,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344171333] [2025-01-10 01:02:38,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:38,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-10 01:02:38,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:38,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-10 01:02:38,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2025-01-10 01:02:39,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:02:39,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 87 transitions, 610 flow. Second operand has 25 states, 25 states have (on average 30.12) internal successors, (753), 25 states have internal predecessors, (753), 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) [2025-01-10 01:02:39,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:39,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:02:39,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:40,443 INFO L124 PetriNetUnfolderBase]: 5998/11264 cut-off events. [2025-01-10 01:02:40,443 INFO L125 PetriNetUnfolderBase]: For 28789/29551 co-relation queries the response was YES. [2025-01-10 01:02:40,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37274 conditions, 11264 events. 5998/11264 cut-off events. For 28789/29551 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 88928 event pairs, 1664 based on Foata normal form. 633/11653 useless extension candidates. Maximal degree in co-relation 37044. Up to 2920 conditions per place. [2025-01-10 01:02:40,499 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 125 selfloop transitions, 22 changer transitions 0/164 dead transitions. [2025-01-10 01:02:40,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 164 transitions, 1343 flow [2025-01-10 01:02:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 01:02:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-10 01:02:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 453 transitions. [2025-01-10 01:02:40,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2025-01-10 01:02:40,500 INFO L175 Difference]: Start difference. First operand has 123 places, 87 transitions, 610 flow. Second operand 12 states and 453 transitions. [2025-01-10 01:02:40,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 164 transitions, 1343 flow [2025-01-10 01:02:40,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 164 transitions, 1285 flow, removed 2 selfloop flow, removed 8 redundant places. [2025-01-10 01:02:40,542 INFO L231 Difference]: Finished difference. Result has 129 places, 88 transitions, 637 flow [2025-01-10 01:02:40,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=637, PETRI_PLACES=129, PETRI_TRANSITIONS=88} [2025-01-10 01:02:40,542 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 69 predicate places. [2025-01-10 01:02:40,543 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 88 transitions, 637 flow [2025-01-10 01:02:40,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.12) internal successors, (753), 25 states have internal predecessors, (753), 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) [2025-01-10 01:02:40,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:40,543 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:40,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-10 01:02:40,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-10 01:02:40,744 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:40,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2134223681, now seen corresponding path program 1 times [2025-01-10 01:02:40,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:40,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823198570] [2025-01-10 01:02:40,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:40,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:40,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-01-10 01:02:40,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-01-10 01:02:40,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:40,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:41,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:41,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823198570] [2025-01-10 01:02:41,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823198570] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:41,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175518883] [2025-01-10 01:02:41,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:41,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:41,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:41,085 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:02:41,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-10 01:02:41,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-01-10 01:02:41,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-01-10 01:02:41,193 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:41,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:41,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-10 01:02:41,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:41,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:41,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:02:41,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-10 01:02:41,289 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:41,290 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 [2025-01-10 01:02:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:41,389 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:41,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-01-10 01:02:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:41,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175518883] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:41,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:41,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2025-01-10 01:02:41,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008112910] [2025-01-10 01:02:41,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:41,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-10 01:02:41,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:41,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-10 01:02:41,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2025-01-10 01:02:42,813 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-01-10 01:02:42,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 88 transitions, 637 flow. Second operand has 32 states, 32 states have (on average 26.96875) internal successors, (863), 32 states have internal predecessors, (863), 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) [2025-01-10 01:02:42,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:42,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-01-10 01:02:42,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:44,896 INFO L124 PetriNetUnfolderBase]: 7173/13447 cut-off events. [2025-01-10 01:02:44,896 INFO L125 PetriNetUnfolderBase]: For 48030/49653 co-relation queries the response was YES. [2025-01-10 01:02:44,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47509 conditions, 13447 events. 7173/13447 cut-off events. For 48030/49653 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 107334 event pairs, 1472 based on Foata normal form. 534/13777 useless extension candidates. Maximal degree in co-relation 47276. Up to 2769 conditions per place. [2025-01-10 01:02:44,996 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 160 selfloop transitions, 23 changer transitions 0/200 dead transitions. [2025-01-10 01:02:44,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 200 transitions, 1706 flow [2025-01-10 01:02:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-10 01:02:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-01-10 01:02:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 592 transitions. [2025-01-10 01:02:44,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2025-01-10 01:02:44,998 INFO L175 Difference]: Start difference. First operand has 129 places, 88 transitions, 637 flow. Second operand 18 states and 592 transitions. [2025-01-10 01:02:44,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 200 transitions, 1706 flow [2025-01-10 01:02:45,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 200 transitions, 1612 flow, removed 6 selfloop flow, removed 10 redundant places. [2025-01-10 01:02:45,045 INFO L231 Difference]: Finished difference. Result has 139 places, 90 transitions, 671 flow [2025-01-10 01:02:45,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=671, PETRI_PLACES=139, PETRI_TRANSITIONS=90} [2025-01-10 01:02:45,045 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2025-01-10 01:02:45,045 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 90 transitions, 671 flow [2025-01-10 01:02:45,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 26.96875) internal successors, (863), 32 states have internal predecessors, (863), 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) [2025-01-10 01:02:45,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:45,046 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:45,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-10 01:02:45,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-10 01:02:45,246 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:45,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash 693249214, now seen corresponding path program 1 times [2025-01-10 01:02:45,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:45,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641929258] [2025-01-10 01:02:45,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:45,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:45,258 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-01-10 01:02:45,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-01-10 01:02:45,274 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:45,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-01-10 01:02:45,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641929258] [2025-01-10 01:02:45,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641929258] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007684893] [2025-01-10 01:02:45,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:45,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:45,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:45,586 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:02:45,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-10 01:02:45,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-01-10 01:02:45,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-01-10 01:02:45,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:45,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:45,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-10 01:02:45,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:45,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:02:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:02:45,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-10 01:02:45,818 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:45,818 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 [2025-01-10 01:02:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:45,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:46,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-01-10 01:02:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:46,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007684893] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:46,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:46,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2025-01-10 01:02:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247322250] [2025-01-10 01:02:46,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:46,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-10 01:02:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:46,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-10 01:02:46,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2025-01-10 01:02:51,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-01-10 01:02:55,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-01-10 01:02:55,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2025-01-10 01:02:55,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 90 transitions, 671 flow. Second operand has 29 states, 29 states have (on average 24.620689655172413) internal successors, (714), 29 states have internal predecessors, (714), 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) [2025-01-10 01:02:55,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:55,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2025-01-10 01:02:55,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:58,608 INFO L124 PetriNetUnfolderBase]: 17266/28943 cut-off events. [2025-01-10 01:02:58,608 INFO L125 PetriNetUnfolderBase]: For 109645/113416 co-relation queries the response was YES. [2025-01-10 01:02:58,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103721 conditions, 28943 events. 17266/28943 cut-off events. For 109645/113416 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 229000 event pairs, 3459 based on Foata normal form. 1146/29941 useless extension candidates. Maximal degree in co-relation 103485. Up to 5626 conditions per place. [2025-01-10 01:02:58,880 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 162 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2025-01-10 01:02:58,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 201 transitions, 1931 flow [2025-01-10 01:02:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-10 01:02:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-01-10 01:02:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 523 transitions. [2025-01-10 01:02:58,882 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4842592592592593 [2025-01-10 01:02:58,882 INFO L175 Difference]: Start difference. First operand has 139 places, 90 transitions, 671 flow. Second operand 18 states and 523 transitions. [2025-01-10 01:02:58,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 201 transitions, 1931 flow [2025-01-10 01:02:58,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 201 transitions, 1862 flow, removed 0 selfloop flow, removed 14 redundant places. [2025-01-10 01:02:58,989 INFO L231 Difference]: Finished difference. Result has 146 places, 93 transitions, 721 flow [2025-01-10 01:02:58,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=721, PETRI_PLACES=146, PETRI_TRANSITIONS=93} [2025-01-10 01:02:58,990 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 86 predicate places. [2025-01-10 01:02:58,990 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 93 transitions, 721 flow [2025-01-10 01:02:58,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 24.620689655172413) internal successors, (714), 29 states have internal predecessors, (714), 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) [2025-01-10 01:02:58,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:58,990 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:58,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-10 01:02:59,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:59,191 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:59,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:59,191 INFO L85 PathProgramCache]: Analyzing trace with hash 15889976, now seen corresponding path program 1 times [2025-01-10 01:02:59,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:59,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532363181] [2025-01-10 01:02:59,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:59,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:59,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-01-10 01:02:59,206 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-01-10 01:02:59,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:59,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-10 01:02:59,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532363181] [2025-01-10 01:02:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532363181] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550482817] [2025-01-10 01:02:59,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:59,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:59,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:59,401 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:02:59,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-10 01:02:59,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-01-10 01:02:59,528 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-01-10 01:02:59,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:59,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:59,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-01-10 01:02:59,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:59,537 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 [2025-01-10 01:02:59,638 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-10 01:02:59,638 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 [2025-01-10 01:02:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:59,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-01-10 01:02:59,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550482817] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:59,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:59,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 6] total 21 [2025-01-10 01:02:59,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737025386] [2025-01-10 01:02:59,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:59,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-10 01:02:59,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:59,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-10 01:02:59,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2025-01-10 01:03:00,507 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:03:00,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 93 transitions, 721 flow. Second operand has 22 states, 22 states have (on average 30.318181818181817) internal successors, (667), 22 states have internal predecessors, (667), 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) [2025-01-10 01:03:00,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:00,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:03:00,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:03,502 INFO L124 PetriNetUnfolderBase]: 12881/23555 cut-off events. [2025-01-10 01:03:03,502 INFO L125 PetriNetUnfolderBase]: For 93386/96137 co-relation queries the response was YES. [2025-01-10 01:03:03,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87334 conditions, 23555 events. 12881/23555 cut-off events. For 93386/96137 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 199664 event pairs, 3459 based on Foata normal form. 1146/24135 useless extension candidates. Maximal degree in co-relation 87094. Up to 6008 conditions per place. [2025-01-10 01:03:03,688 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 158 selfloop transitions, 23 changer transitions 0/199 dead transitions. [2025-01-10 01:03:03,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 199 transitions, 1915 flow [2025-01-10 01:03:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:03:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:03:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 486 transitions. [2025-01-10 01:03:03,689 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2025-01-10 01:03:03,689 INFO L175 Difference]: Start difference. First operand has 146 places, 93 transitions, 721 flow. Second operand 13 states and 486 transitions. [2025-01-10 01:03:03,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 199 transitions, 1915 flow [2025-01-10 01:03:03,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 199 transitions, 1874 flow, removed 2 selfloop flow, removed 13 redundant places. [2025-01-10 01:03:03,843 INFO L231 Difference]: Finished difference. Result has 148 places, 94 transitions, 752 flow [2025-01-10 01:03:03,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=752, PETRI_PLACES=148, PETRI_TRANSITIONS=94} [2025-01-10 01:03:03,844 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 88 predicate places. [2025-01-10 01:03:03,844 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 94 transitions, 752 flow [2025-01-10 01:03:03,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 30.318181818181817) internal successors, (667), 22 states have internal predecessors, (667), 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) [2025-01-10 01:03:03,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:03,844 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:03:03,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-10 01:03:04,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:04,045 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:03:04,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:04,045 INFO L85 PathProgramCache]: Analyzing trace with hash 673774947, now seen corresponding path program 2 times [2025-01-10 01:03:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:04,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999858856] [2025-01-10 01:03:04,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:04,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:04,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-10 01:03:04,073 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-10 01:03:04,073 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:03:04,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-01-10 01:03:04,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999858856] [2025-01-10 01:03:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999858856] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:03:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492830589] [2025-01-10 01:03:04,352 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:04,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:04,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:03:04,354 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:03:04,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-10 01:03:04,447 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-10 01:03:04,491 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-10 01:03:04,491 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:03:04,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:04,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-01-10 01:03:04,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:03:04,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:03:04,612 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-10 01:03:04,612 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 12 treesize of output 14 [2025-01-10 01:03:04,924 INFO L349 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2025-01-10 01:03:04,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 25 [2025-01-10 01:03:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-10 01:03:05,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:03:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-10 01:03:05,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492830589] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:03:05,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:03:05,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 18] total 43 [2025-01-10 01:03:05,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915502710] [2025-01-10 01:03:05,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:03:05,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-01-10 01:03:05,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:05,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-01-10 01:03:05,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1567, Unknown=0, NotChecked=0, Total=1980 [2025-01-10 01:03:07,354 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2025-01-10 01:03:07,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 94 transitions, 752 flow. Second operand has 45 states, 45 states have (on average 24.333333333333332) internal successors, (1095), 45 states have internal predecessors, (1095), 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) [2025-01-10 01:03:07,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:07,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2025-01-10 01:03:07,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:14,210 INFO L124 PetriNetUnfolderBase]: 30541/46216 cut-off events. [2025-01-10 01:03:14,210 INFO L125 PetriNetUnfolderBase]: For 228714/235350 co-relation queries the response was YES. [2025-01-10 01:03:14,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183931 conditions, 46216 events. 30541/46216 cut-off events. For 228714/235350 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 333466 event pairs, 2145 based on Foata normal form. 900/44119 useless extension candidates. Maximal degree in co-relation 183688. Up to 7038 conditions per place. [2025-01-10 01:03:14,693 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 248 selfloop transitions, 29 changer transitions 0/288 dead transitions. [2025-01-10 01:03:14,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 288 transitions, 2759 flow [2025-01-10 01:03:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-10 01:03:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-01-10 01:03:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 697 transitions. [2025-01-10 01:03:14,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.505072463768116 [2025-01-10 01:03:14,694 INFO L175 Difference]: Start difference. First operand has 148 places, 94 transitions, 752 flow. Second operand 23 states and 697 transitions. [2025-01-10 01:03:14,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 288 transitions, 2759 flow [2025-01-10 01:03:14,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 288 transitions, 2607 flow, removed 8 selfloop flow, removed 15 redundant places. [2025-01-10 01:03:14,997 INFO L231 Difference]: Finished difference. Result has 155 places, 94 transitions, 743 flow [2025-01-10 01:03:14,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=743, PETRI_PLACES=155, PETRI_TRANSITIONS=94} [2025-01-10 01:03:14,998 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 95 predicate places. [2025-01-10 01:03:14,998 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 94 transitions, 743 flow [2025-01-10 01:03:14,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 24.333333333333332) internal successors, (1095), 45 states have internal predecessors, (1095), 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) [2025-01-10 01:03:14,998 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:14,998 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:03:15,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-10 01:03:15,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:15,199 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:03:15,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1781543564, now seen corresponding path program 1 times [2025-01-10 01:03:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:15,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317193702] [2025-01-10 01:03:15,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:03:15,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:15,208 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-10 01:03:15,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-10 01:03:15,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:03:15,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-01-10 01:03:15,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:15,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317193702] [2025-01-10 01:03:15,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317193702] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:03:15,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:03:15,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:03:15,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70673316] [2025-01-10 01:03:15,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:03:15,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:03:15,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:15,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:03:15,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:03:15,282 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-01-10 01:03:15,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 94 transitions, 743 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2025-01-10 01:03:15,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:15,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-01-10 01:03:15,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:18,260 INFO L124 PetriNetUnfolderBase]: 12004/22716 cut-off events. [2025-01-10 01:03:18,261 INFO L125 PetriNetUnfolderBase]: For 96252/98775 co-relation queries the response was YES. [2025-01-10 01:03:18,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85724 conditions, 22716 events. 12004/22716 cut-off events. For 96252/98775 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 196535 event pairs, 8603 based on Foata normal form. 30/22154 useless extension candidates. Maximal degree in co-relation 85480. Up to 14921 conditions per place. [2025-01-10 01:03:18,482 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 96 selfloop transitions, 2 changer transitions 1/118 dead transitions. [2025-01-10 01:03:18,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 118 transitions, 1114 flow [2025-01-10 01:03:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:03:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:03:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2025-01-10 01:03:18,483 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7388888888888889 [2025-01-10 01:03:18,483 INFO L175 Difference]: Start difference. First operand has 155 places, 94 transitions, 743 flow. Second operand 3 states and 133 transitions. [2025-01-10 01:03:18,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 118 transitions, 1114 flow [2025-01-10 01:03:18,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 118 transitions, 1056 flow, removed 1 selfloop flow, removed 21 redundant places. [2025-01-10 01:03:18,652 INFO L231 Difference]: Finished difference. Result has 137 places, 94 transitions, 693 flow [2025-01-10 01:03:18,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=693, PETRI_PLACES=137, PETRI_TRANSITIONS=94} [2025-01-10 01:03:18,653 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 77 predicate places. [2025-01-10 01:03:18,653 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 94 transitions, 693 flow [2025-01-10 01:03:18,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2025-01-10 01:03:18,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:18,653 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:03:18,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-01-10 01:03:18,653 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:03:18,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:18,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1958184746, now seen corresponding path program 2 times [2025-01-10 01:03:18,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:18,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466030689] [2025-01-10 01:03:18,654 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:18,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:18,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-01-10 01:03:18,687 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-01-10 01:03:18,687 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:03:18,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-01-10 01:03:19,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466030689] [2025-01-10 01:03:19,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466030689] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:03:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751301604] [2025-01-10 01:03:19,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:19,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:03:19,208 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:03:19,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-10 01:03:19,485 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-01-10 01:03:19,533 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-01-10 01:03:19,533 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:03:19,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:19,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-01-10 01:03:19,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:03:19,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:03:19,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:03:19,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-10 01:03:19,670 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-10 01:03:19,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-01-10 01:03:19,758 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-10 01:03:19,759 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 16 treesize of output 15 [2025-01-10 01:03:19,775 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:03:19,775 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 [2025-01-10 01:03:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:03:19,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:03:20,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2025-01-10 01:03:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:03:20,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751301604] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:03:20,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:03:20,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 13] total 36 [2025-01-10 01:03:20,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879912334] [2025-01-10 01:03:20,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:03:20,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-01-10 01:03:20,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:20,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-01-10 01:03:20,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2025-01-10 01:03:22,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2025-01-10 01:03:22,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 94 transitions, 693 flow. Second operand has 38 states, 38 states have (on average 22.63157894736842) internal successors, (860), 38 states have internal predecessors, (860), 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) [2025-01-10 01:03:22,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:22,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2025-01-10 01:03:22,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand