./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-simple-array-sum.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 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:11:30,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:11:30,949 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:11:30,959 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:11:30,960 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:11:30,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:11:30,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:11:30,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:11:30,986 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:11:30,987 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:11:30,987 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:11:30,987 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:11:30,988 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:11:30,988 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:11:30,989 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:11:30,989 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:11:30,989 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:11:30,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:11:30,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:11:30,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:11:30,989 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:11:30,990 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:11:30,990 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:11:30,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:11:30,990 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:11:30,990 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:11:30,990 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:11:30,990 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:11:30,990 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:11:30,990 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:11:30,991 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:11:30,991 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:11:30,991 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:11:30,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:11:30,991 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:11:30,991 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:11:30,991 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:11:30,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:11:30,991 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:11:30,992 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:11:30,992 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:11:30,992 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:11:30,992 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 -> 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 [2025-02-06 13:11:31,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:11:31,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:11:31,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:11:31,271 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:11:31,271 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:11:31,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2025-02-06 13:11:32,554 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c05953dce/b42fdb265e5e481cb83fc83c2ca1f1fe/FLAG9d57b0fd4 [2025-02-06 13:11:32,781 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:11:32,784 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2025-02-06 13:11:32,793 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c05953dce/b42fdb265e5e481cb83fc83c2ca1f1fe/FLAG9d57b0fd4 [2025-02-06 13:11:32,808 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c05953dce/b42fdb265e5e481cb83fc83c2ca1f1fe [2025-02-06 13:11:32,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:11:32,811 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:11:32,812 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:11:32,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:11:32,816 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:11:32,817 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:11:32" (1/1) ... [2025-02-06 13:11:32,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c29319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:32, skipping insertion in model container [2025-02-06 13:11:32,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:11:32" (1/1) ... [2025-02-06 13:11:32,836 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:11:33,019 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:11:33,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:11:33,035 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:11:33,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:11:33,075 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:11:33,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33 WrapperNode [2025-02-06 13:11:33,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:11:33,077 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:11:33,078 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:11:33,078 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:11:33,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,118 INFO L138 Inliner]: procedures = 23, calls = 21, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 105 [2025-02-06 13:11:33,122 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:11:33,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:11:33,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:11:33,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:11:33,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,137 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,161 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-06 13:11:33,161 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,168 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:11:33,181 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:11:33,181 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:11:33,181 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:11:33,182 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (1/1) ... [2025-02-06 13:11:33,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:11:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:33,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:11:33,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:11:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:11:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:11:33,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:11:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:11:33,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:11:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:11:33,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:11:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:11:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:11:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:11:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:11:33,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:11:33,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:11:33,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:11:33,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:11:33,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:11:33,235 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:11:33,316 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:11:33,318 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:11:33,628 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:11:33,628 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:11:33,816 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:11:33,817 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:11:33,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:11:33 BoogieIcfgContainer [2025-02-06 13:11:33,817 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:11:33,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:11:33,821 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:11:33,825 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:11:33,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:11:32" (1/3) ... [2025-02-06 13:11:33,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fd8f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:11:33, skipping insertion in model container [2025-02-06 13:11:33,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:33" (2/3) ... [2025-02-06 13:11:33,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fd8f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:11:33, skipping insertion in model container [2025-02-06 13:11:33,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:11:33" (3/3) ... [2025-02-06 13:11:33,829 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2025-02-06 13:11:33,844 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:11:33,846 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-simple-array-sum.wvr.c that has 4 procedures, 52 locations, 1 initial locations, 5 loop locations, and 14 error locations. [2025-02-06 13:11:33,846 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:11:33,920 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:11:33,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 135 flow [2025-02-06 13:11:33,989 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2025-02-06 13:11:33,993 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:11:33,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 54 events. 6/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 38. Up to 3 conditions per place. [2025-02-06 13:11:33,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 135 flow [2025-02-06 13:11:34,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 124 flow [2025-02-06 13:11:34,013 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:11:34,028 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;@fb812b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:11:34,032 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2025-02-06 13:11:34,054 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:11:34,054 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:11:34,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:11:34,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:34,055 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:11:34,055 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:34,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:34,063 INFO L85 PathProgramCache]: Analyzing trace with hash 440642, now seen corresponding path program 1 times [2025-02-06 13:11:34,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:34,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214409062] [2025-02-06 13:11:34,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:34,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:11:34,165 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:11:34,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:34,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:34,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:34,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214409062] [2025-02-06 13:11:34,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214409062] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:34,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:34,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:11:34,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210807918] [2025-02-06 13:11:34,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:34,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:11:34,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:34,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:11:34,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:11:34,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-06 13:11:34,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:34,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:34,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-06 13:11:34,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:34,938 INFO L124 PetriNetUnfolderBase]: 2574/3856 cut-off events. [2025-02-06 13:11:34,939 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2025-02-06 13:11:34,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7631 conditions, 3856 events. 2574/3856 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21833 event pairs, 2104 based on Foata normal form. 1/2721 useless extension candidates. Maximal degree in co-relation 7075. Up to 3553 conditions per place. [2025-02-06 13:11:35,011 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 38 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2025-02-06 13:11:35,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 196 flow [2025-02-06 13:11:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:11:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:11:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2025-02-06 13:11:35,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47953216374269003 [2025-02-06 13:11:35,028 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 82 transitions. [2025-02-06 13:11:35,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 196 flow [2025-02-06 13:11:35,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:11:35,041 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 108 flow [2025-02-06 13:11:35,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2025-02-06 13:11:35,047 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2025-02-06 13:11:35,048 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 108 flow [2025-02-06 13:11:35,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:35,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:35,049 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:11:35,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:11:35,049 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:35,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:35,051 INFO L85 PathProgramCache]: Analyzing trace with hash 440643, now seen corresponding path program 1 times [2025-02-06 13:11:35,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:35,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750562509] [2025-02-06 13:11:35,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:35,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:35,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:11:35,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:11:35,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:35,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:35,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:35,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750562509] [2025-02-06 13:11:35,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750562509] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:35,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:35,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:11:35,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933070896] [2025-02-06 13:11:35,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:35,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:35,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:35,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:35,406 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-06 13:11:35,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:35,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:35,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-06 13:11:35,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:35,856 INFO L124 PetriNetUnfolderBase]: 2575/3859 cut-off events. [2025-02-06 13:11:35,856 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-02-06 13:11:35,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7494 conditions, 3859 events. 2575/3859 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21809 event pairs, 2104 based on Foata normal form. 0/2721 useless extension candidates. Maximal degree in co-relation 7465. Up to 3562 conditions per place. [2025-02-06 13:11:35,890 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 41 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2025-02-06 13:11:35,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 204 flow [2025-02-06 13:11:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-02-06 13:11:35,894 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2025-02-06 13:11:35,894 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 108 flow. Second operand 4 states and 98 transitions. [2025-02-06 13:11:35,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 204 flow [2025-02-06 13:11:35,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:35,898 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 131 flow [2025-02-06 13:11:35,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2025-02-06 13:11:35,899 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2025-02-06 13:11:35,899 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 131 flow [2025-02-06 13:11:35,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:35,900 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:35,900 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:11:35,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:11:35,901 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:35,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash 13660567, now seen corresponding path program 1 times [2025-02-06 13:11:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:35,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148385451] [2025-02-06 13:11:35,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:35,912 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:11:35,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:11:35,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:35,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:36,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:36,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148385451] [2025-02-06 13:11:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148385451] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:36,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:36,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:36,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056990191] [2025-02-06 13:11:36,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:36,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:36,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:36,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:36,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:36,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-06 13:11:36,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:36,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:36,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-06 13:11:36,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:36,560 INFO L124 PetriNetUnfolderBase]: 2576/3864 cut-off events. [2025-02-06 13:11:36,560 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-02-06 13:11:36,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 3864 events. 2576/3864 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21830 event pairs, 2104 based on Foata normal form. 0/2727 useless extension candidates. Maximal degree in co-relation 7474. Up to 3561 conditions per place. [2025-02-06 13:11:36,594 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 40 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2025-02-06 13:11:36,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 233 flow [2025-02-06 13:11:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2025-02-06 13:11:36,598 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-02-06 13:11:36,598 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 131 flow. Second operand 4 states and 108 transitions. [2025-02-06 13:11:36,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 233 flow [2025-02-06 13:11:36,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:36,600 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 162 flow [2025-02-06 13:11:36,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-02-06 13:11:36,602 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2025-02-06 13:11:36,602 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 162 flow [2025-02-06 13:11:36,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:36,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:36,603 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:11:36,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:11:36,603 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:36,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash 423471882, now seen corresponding path program 1 times [2025-02-06 13:11:36,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:36,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712830896] [2025-02-06 13:11:36,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:36,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:36,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:11:36,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:11:36,629 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:36,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:36,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:36,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712830896] [2025-02-06 13:11:36,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712830896] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:36,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512410838] [2025-02-06 13:11:36,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:36,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:36,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:36,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:36,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:11:37,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:11:37,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:11:37,037 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:37,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:37,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:11:37,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:37,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:11:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:37,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:37,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512410838] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:37,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:37,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:11:37,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203004828] [2025-02-06 13:11:37,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:37,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:11:37,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:37,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:11:37,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:11:37,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-06 13:11:37,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 162 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:37,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:37,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-06 13:11:37,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:38,047 INFO L124 PetriNetUnfolderBase]: 2577/3866 cut-off events. [2025-02-06 13:11:38,047 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2025-02-06 13:11:38,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7538 conditions, 3866 events. 2577/3866 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 21876 event pairs, 2104 based on Foata normal form. 0/2732 useless extension candidates. Maximal degree in co-relation 7478. Up to 3562 conditions per place. [2025-02-06 13:11:38,077 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 39 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2025-02-06 13:11:38,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 273 flow [2025-02-06 13:11:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:11:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:11:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2025-02-06 13:11:38,083 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3235867446393762 [2025-02-06 13:11:38,083 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 162 flow. Second operand 9 states and 166 transitions. [2025-02-06 13:11:38,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 273 flow [2025-02-06 13:11:38,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 273 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 13:11:38,087 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 195 flow [2025-02-06 13:11:38,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=195, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2025-02-06 13:11:38,088 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2025-02-06 13:11:38,089 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 195 flow [2025-02-06 13:11:38,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:38,089 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:38,089 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:11:38,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 13:11:38,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:38,294 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:38,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash 242727088, now seen corresponding path program 1 times [2025-02-06 13:11:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:38,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241173750] [2025-02-06 13:11:38,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:38,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:38,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:11:38,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:11:38,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:38,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241173750] [2025-02-06 13:11:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241173750] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:38,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903536336] [2025-02-06 13:11:38,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:38,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:38,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:38,532 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:38,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:11:38,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:11:38,588 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:11:38,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:38,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:38,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:11:38,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:38,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:11:38,712 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:11:38,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2025-02-06 13:11:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:38,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:38,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903536336] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:38,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:11:38,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2025-02-06 13:11:38,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989740365] [2025-02-06 13:11:38,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:38,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:11:38,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:38,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:11:38,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:11:38,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-06 13:11:38,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:38,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:38,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-06 13:11:38,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:39,481 INFO L124 PetriNetUnfolderBase]: 5148/7712 cut-off events. [2025-02-06 13:11:39,482 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2025-02-06 13:11:39,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15013 conditions, 7712 events. 5148/7712 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 48446 event pairs, 4208 based on Foata normal form. 1/5467 useless extension candidates. Maximal degree in co-relation 7511. Up to 3562 conditions per place. [2025-02-06 13:11:39,580 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 77 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2025-02-06 13:11:39,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 91 transitions, 439 flow [2025-02-06 13:11:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:11:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:11:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-02-06 13:11:39,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2025-02-06 13:11:39,581 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 195 flow. Second operand 5 states and 147 transitions. [2025-02-06 13:11:39,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 91 transitions, 439 flow [2025-02-06 13:11:39,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 91 transitions, 396 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-06 13:11:39,584 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 172 flow [2025-02-06 13:11:39,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2025-02-06 13:11:39,585 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2025-02-06 13:11:39,585 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 172 flow [2025-02-06 13:11:39,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:39,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:39,586 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:39,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:11:39,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:39,787 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:39,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1057525552, now seen corresponding path program 1 times [2025-02-06 13:11:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:39,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119064038] [2025-02-06 13:11:39,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:39,794 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:11:39,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:11:39,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:39,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:39,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:39,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119064038] [2025-02-06 13:11:39,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119064038] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:39,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:39,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:11:39,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905988140] [2025-02-06 13:11:39,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:39,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:11:39,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:39,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:11:39,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:11:39,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:11:39,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:39,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:39,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:11:39,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:40,633 INFO L124 PetriNetUnfolderBase]: 5351/8119 cut-off events. [2025-02-06 13:11:40,633 INFO L125 PetriNetUnfolderBase]: For 203/203 co-relation queries the response was YES. [2025-02-06 13:11:40,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15876 conditions, 8119 events. 5351/8119 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 50705 event pairs, 3820 based on Foata normal form. 0/5885 useless extension candidates. Maximal degree in co-relation 8644. Up to 4115 conditions per place. [2025-02-06 13:11:40,668 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 92 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2025-02-06 13:11:40,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 490 flow [2025-02-06 13:11:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:11:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:11:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2025-02-06 13:11:40,672 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5380116959064327 [2025-02-06 13:11:40,672 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 172 flow. Second operand 6 states and 184 transitions. [2025-02-06 13:11:40,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 490 flow [2025-02-06 13:11:40,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 473 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:11:40,674 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 191 flow [2025-02-06 13:11:40,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2025-02-06 13:11:40,675 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2025-02-06 13:11:40,677 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 191 flow [2025-02-06 13:11:40,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:40,677 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:40,677 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:40,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:11:40,677 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:40,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:40,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1332510990, now seen corresponding path program 1 times [2025-02-06 13:11:40,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:40,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136617702] [2025-02-06 13:11:40,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:40,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:40,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:11:40,689 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:11:40,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:40,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:40,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:40,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136617702] [2025-02-06 13:11:40,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136617702] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:40,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881232777] [2025-02-06 13:11:40,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:40,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:40,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:40,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:40,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:11:40,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:11:40,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:11:40,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:40,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:40,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:11:40,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:40,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:40,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881232777] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:40,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:40,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-06 13:11:40,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411322986] [2025-02-06 13:11:41,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:41,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:11:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:41,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:11:41,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:11:41,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-06 13:11:41,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 191 flow. Second operand has 13 states, 13 states have (on average 16.53846153846154) internal successors, (215), 13 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:41,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:41,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-06 13:11:41,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:41,881 INFO L124 PetriNetUnfolderBase]: 6287/9471 cut-off events. [2025-02-06 13:11:41,882 INFO L125 PetriNetUnfolderBase]: For 1687/1888 co-relation queries the response was YES. [2025-02-06 13:11:41,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19915 conditions, 9471 events. 6287/9471 cut-off events. For 1687/1888 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 59869 event pairs, 5244 based on Foata normal form. 1/6809 useless extension candidates. Maximal degree in co-relation 7814. Up to 5283 conditions per place. [2025-02-06 13:11:41,941 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 74 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2025-02-06 13:11:41,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 492 flow [2025-02-06 13:11:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:11:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:11:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2025-02-06 13:11:41,943 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4405458089668616 [2025-02-06 13:11:41,944 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 191 flow. Second operand 9 states and 226 transitions. [2025-02-06 13:11:41,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 492 flow [2025-02-06 13:11:41,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 475 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:11:41,951 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 259 flow [2025-02-06 13:11:41,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=259, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2025-02-06 13:11:41,952 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2025-02-06 13:11:41,953 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 259 flow [2025-02-06 13:11:41,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.53846153846154) internal successors, (215), 13 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:41,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:41,954 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:41,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:11:42,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:42,159 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:42,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1583711494, now seen corresponding path program 1 times [2025-02-06 13:11:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:42,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348234806] [2025-02-06 13:11:42,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:42,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:42,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:11:42,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:11:42,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:42,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:42,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348234806] [2025-02-06 13:11:42,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348234806] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:42,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:42,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:11:42,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579721422] [2025-02-06 13:11:42,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:42,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:11:42,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:42,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:11:42,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:11:42,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:11:42,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:42,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:42,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:11:42,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:42,811 INFO L124 PetriNetUnfolderBase]: 5983/9001 cut-off events. [2025-02-06 13:11:42,811 INFO L125 PetriNetUnfolderBase]: For 1179/1531 co-relation queries the response was YES. [2025-02-06 13:11:42,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18460 conditions, 9001 events. 5983/9001 cut-off events. For 1179/1531 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 54356 event pairs, 4818 based on Foata normal form. 0/6344 useless extension candidates. Maximal degree in co-relation 8586. Up to 7819 conditions per place. [2025-02-06 13:11:42,876 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 79 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2025-02-06 13:11:42,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 98 transitions, 529 flow [2025-02-06 13:11:42,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:11:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:11:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2025-02-06 13:11:42,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48830409356725146 [2025-02-06 13:11:42,878 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 259 flow. Second operand 6 states and 167 transitions. [2025-02-06 13:11:42,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 98 transitions, 529 flow [2025-02-06 13:11:42,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 497 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-02-06 13:11:42,943 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 268 flow [2025-02-06 13:11:42,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2025-02-06 13:11:42,944 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2025-02-06 13:11:42,944 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 268 flow [2025-02-06 13:11:42,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:42,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:42,944 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2025-02-06 13:11:42,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:11:42,944 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:42,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash 460886951, now seen corresponding path program 2 times [2025-02-06 13:11:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:42,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701317210] [2025-02-06 13:11:42,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:42,954 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-06 13:11:42,977 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:11:42,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:42,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:11:43,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:43,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701317210] [2025-02-06 13:11:43,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701317210] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123002886] [2025-02-06 13:11:43,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:43,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:43,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:43,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:43,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:11:43,246 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-06 13:11:43,271 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:11:43,271 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:43,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:43,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 13:11:43,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:43,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:11:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:11:43,490 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:11:43,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123002886] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:43,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:43,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 13 [2025-02-06 13:11:43,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169983149] [2025-02-06 13:11:43,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:43,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:11:43,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:43,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:11:43,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:11:43,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-06 13:11:43,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 268 flow. Second operand has 15 states, 15 states have (on average 14.733333333333333) internal successors, (221), 15 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:43,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:43,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-06 13:11:43,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:44,555 INFO L124 PetriNetUnfolderBase]: 5329/8079 cut-off events. [2025-02-06 13:11:44,555 INFO L125 PetriNetUnfolderBase]: For 1629/1947 co-relation queries the response was YES. [2025-02-06 13:11:44,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17574 conditions, 8079 events. 5329/8079 cut-off events. For 1629/1947 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 51585 event pairs, 4488 based on Foata normal form. 2/5983 useless extension candidates. Maximal degree in co-relation 8026. Up to 7590 conditions per place. [2025-02-06 13:11:44,610 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 38 selfloop transitions, 22 changer transitions 0/67 dead transitions. [2025-02-06 13:11:44,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 67 transitions, 391 flow [2025-02-06 13:11:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:11:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:11:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2025-02-06 13:11:44,612 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3458646616541353 [2025-02-06 13:11:44,612 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 268 flow. Second operand 7 states and 138 transitions. [2025-02-06 13:11:44,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 67 transitions, 391 flow [2025-02-06 13:11:44,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 67 transitions, 368 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:11:44,619 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 292 flow [2025-02-06 13:11:44,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2025-02-06 13:11:44,619 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2025-02-06 13:11:44,620 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 292 flow [2025-02-06 13:11:44,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.733333333333333) internal successors, (221), 15 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:44,620 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:44,620 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:44,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:11:44,821 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,SelfDestructingSolverStorable8 [2025-02-06 13:11:44,821 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:44,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1545397767, now seen corresponding path program 1 times [2025-02-06 13:11:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:44,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194879076] [2025-02-06 13:11:44,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:44,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:44,828 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:11:44,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:11:44,835 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:44,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194879076] [2025-02-06 13:11:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194879076] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618661072] [2025-02-06 13:11:45,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:45,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:45,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:11:45,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:11:45,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:11:45,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:45,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:45,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-06 13:11:45,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:45,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:11:45,107 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 [2025-02-06 13:11:45,157 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:11:45,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:11:45,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2025-02-06 13:11:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:11:45,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:11:45,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618661072] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:45,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:11:45,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2025-02-06 13:11:45,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672050447] [2025-02-06 13:11:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:45,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:11:45,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:45,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:11:45,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:11:45,768 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-06 13:11:45,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:45,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:45,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-06 13:11:45,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:46,533 INFO L124 PetriNetUnfolderBase]: 7337/10887 cut-off events. [2025-02-06 13:11:46,533 INFO L125 PetriNetUnfolderBase]: For 2087/2849 co-relation queries the response was YES. [2025-02-06 13:11:46,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23375 conditions, 10887 events. 7337/10887 cut-off events. For 2087/2849 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 68210 event pairs, 3380 based on Foata normal form. 0/7860 useless extension candidates. Maximal degree in co-relation 10917. Up to 5997 conditions per place. [2025-02-06 13:11:46,598 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 86 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2025-02-06 13:11:46,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 109 transitions, 594 flow [2025-02-06 13:11:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:11:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:11:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2025-02-06 13:11:46,600 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2025-02-06 13:11:46,600 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 292 flow. Second operand 7 states and 195 transitions. [2025-02-06 13:11:46,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 109 transitions, 594 flow [2025-02-06 13:11:46,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 587 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:46,606 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 340 flow [2025-02-06 13:11:46,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=340, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2025-02-06 13:11:46,606 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2025-02-06 13:11:46,606 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 340 flow [2025-02-06 13:11:46,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:46,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:46,607 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:46,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:11:46,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 13:11:46,809 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:46,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1545397768, now seen corresponding path program 1 times [2025-02-06 13:11:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:46,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542614383] [2025-02-06 13:11:46,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:46,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:46,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:11:46,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:11:46,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:46,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:11:46,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:46,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542614383] [2025-02-06 13:11:46,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542614383] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:46,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:46,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:46,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95783620] [2025-02-06 13:11:46,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:46,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:11:46,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:46,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:11:46,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:11:46,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-06 13:11:46,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 340 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:46,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:46,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-06 13:11:46,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:47,299 INFO L124 PetriNetUnfolderBase]: 5133/7763 cut-off events. [2025-02-06 13:11:47,299 INFO L125 PetriNetUnfolderBase]: For 7241/7761 co-relation queries the response was YES. [2025-02-06 13:11:47,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20366 conditions, 7763 events. 5133/7763 cut-off events. For 7241/7761 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 47322 event pairs, 4050 based on Foata normal form. 580/7146 useless extension candidates. Maximal degree in co-relation 10893. Up to 7180 conditions per place. [2025-02-06 13:11:47,337 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 50 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2025-02-06 13:11:47,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 456 flow [2025-02-06 13:11:47,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:11:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:11:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2025-02-06 13:11:47,338 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-02-06 13:11:47,338 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 340 flow. Second operand 5 states and 105 transitions. [2025-02-06 13:11:47,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 456 flow [2025-02-06 13:11:47,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 433 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 13:11:47,345 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 333 flow [2025-02-06 13:11:47,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2025-02-06 13:11:47,345 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2025-02-06 13:11:47,345 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 333 flow [2025-02-06 13:11:47,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:47,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:47,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:47,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:11:47,346 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:47,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1332472069, now seen corresponding path program 1 times [2025-02-06 13:11:47,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:47,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971071333] [2025-02-06 13:11:47,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:47,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:47,352 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:11:47,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:11:47,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:47,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:47,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:47,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971071333] [2025-02-06 13:11:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971071333] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:47,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:47,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747413649] [2025-02-06 13:11:47,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:47,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:47,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:47,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:47,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:47,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:11:47,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:47,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:47,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:11:47,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:47,989 INFO L124 PetriNetUnfolderBase]: 7019/10459 cut-off events. [2025-02-06 13:11:47,989 INFO L125 PetriNetUnfolderBase]: For 8921/9867 co-relation queries the response was YES. [2025-02-06 13:11:48,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26658 conditions, 10459 events. 7019/10459 cut-off events. For 8921/9867 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 59717 event pairs, 1562 based on Foata normal form. 232/9267 useless extension candidates. Maximal degree in co-relation 13651. Up to 6763 conditions per place. [2025-02-06 13:11:48,040 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 102 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2025-02-06 13:11:48,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 713 flow [2025-02-06 13:11:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2025-02-06 13:11:48,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-02-06 13:11:48,041 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 333 flow. Second operand 4 states and 133 transitions. [2025-02-06 13:11:48,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 713 flow [2025-02-06 13:11:48,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 699 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:11:48,046 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 344 flow [2025-02-06 13:11:48,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2025-02-06 13:11:48,046 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2025-02-06 13:11:48,046 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 344 flow [2025-02-06 13:11:48,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:48,046 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:48,047 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:48,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 13:11:48,047 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:48,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash 889948144, now seen corresponding path program 1 times [2025-02-06 13:11:48,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:48,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832597719] [2025-02-06 13:11:48,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:48,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:48,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:11:48,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:11:48,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:48,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:48,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:48,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832597719] [2025-02-06 13:11:48,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832597719] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:48,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613764625] [2025-02-06 13:11:48,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:48,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:48,252 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:48,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:11:48,300 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:11:48,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:11:48,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:48,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:48,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-06 13:11:48,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:48,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:11:48,337 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 [2025-02-06 13:11:48,381 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:11:48,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:11:48,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2025-02-06 13:11:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:11:48,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:11:48,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613764625] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:48,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:11:48,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2025-02-06 13:11:48,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073449202] [2025-02-06 13:11:48,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:48,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:11:48,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:48,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:11:48,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:11:48,945 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-06 13:11:48,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:48,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:48,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-06 13:11:48,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:49,757 INFO L124 PetriNetUnfolderBase]: 6077/9233 cut-off events. [2025-02-06 13:11:49,758 INFO L125 PetriNetUnfolderBase]: For 8955/9743 co-relation queries the response was YES. [2025-02-06 13:11:49,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24803 conditions, 9233 events. 6077/9233 cut-off events. For 8955/9743 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 55792 event pairs, 1786 based on Foata normal form. 0/7978 useless extension candidates. Maximal degree in co-relation 12740. Up to 5432 conditions per place. [2025-02-06 13:11:49,817 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 80 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2025-02-06 13:11:49,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 103 transitions, 648 flow [2025-02-06 13:11:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:11:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:11:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2025-02-06 13:11:49,818 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45363408521303256 [2025-02-06 13:11:49,818 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 344 flow. Second operand 7 states and 181 transitions. [2025-02-06 13:11:49,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 103 transitions, 648 flow [2025-02-06 13:11:49,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 648 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 13:11:49,824 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 399 flow [2025-02-06 13:11:49,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=399, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2025-02-06 13:11:49,825 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2025-02-06 13:11:49,825 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 399 flow [2025-02-06 13:11:49,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:49,825 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:49,825 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:49,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:11:50,026 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,SelfDestructingSolverStorable12 [2025-02-06 13:11:50,026 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:50,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:50,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1189975242, now seen corresponding path program 1 times [2025-02-06 13:11:50,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:50,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492786582] [2025-02-06 13:11:50,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:50,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:50,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:11:50,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:11:50,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:50,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:50,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:50,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492786582] [2025-02-06 13:11:50,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492786582] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:50,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366466082] [2025-02-06 13:11:50,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:50,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:50,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:50,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:50,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:11:50,212 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:11:50,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:11:50,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:50,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:50,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:11:50,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:50,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:50,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366466082] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:50,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:50,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:11:50,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482643965] [2025-02-06 13:11:50,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:50,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:11:50,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:50,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:11:50,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:11:50,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:11:50,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 399 flow. Second operand has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:50,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:50,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:11:50,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:51,312 INFO L124 PetriNetUnfolderBase]: 6763/10256 cut-off events. [2025-02-06 13:11:51,312 INFO L125 PetriNetUnfolderBase]: For 10958/11091 co-relation queries the response was YES. [2025-02-06 13:11:51,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29121 conditions, 10256 events. 6763/10256 cut-off events. For 10958/11091 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 59652 event pairs, 4146 based on Foata normal form. 186/9218 useless extension candidates. Maximal degree in co-relation 16337. Up to 5392 conditions per place. [2025-02-06 13:11:51,374 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 134 selfloop transitions, 24 changer transitions 0/164 dead transitions. [2025-02-06 13:11:51,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 164 transitions, 1069 flow [2025-02-06 13:11:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:11:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:11:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2025-02-06 13:11:51,376 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-02-06 13:11:51,376 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 399 flow. Second operand 10 states and 270 transitions. [2025-02-06 13:11:51,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 164 transitions, 1069 flow [2025-02-06 13:11:51,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 164 transitions, 1033 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-02-06 13:11:51,388 INFO L231 Difference]: Finished difference. Result has 97 places, 76 transitions, 472 flow [2025-02-06 13:11:51,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=472, PETRI_PLACES=97, PETRI_TRANSITIONS=76} [2025-02-06 13:11:51,389 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2025-02-06 13:11:51,389 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 76 transitions, 472 flow [2025-02-06 13:11:51,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:51,389 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:51,389 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:51,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 13:11:51,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:51,590 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:51,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1818589155, now seen corresponding path program 1 times [2025-02-06 13:11:51,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:51,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724961754] [2025-02-06 13:11:51,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:51,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:51,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:11:51,604 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:11:51,605 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:51,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:11:51,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:51,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724961754] [2025-02-06 13:11:51,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724961754] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:51,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:51,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:51,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485619436] [2025-02-06 13:11:51,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:51,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:51,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:51,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:51,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:51,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-06 13:11:51,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 76 transitions, 472 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:51,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:51,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-06 13:11:51,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:52,127 INFO L124 PetriNetUnfolderBase]: 4311/6736 cut-off events. [2025-02-06 13:11:52,127 INFO L125 PetriNetUnfolderBase]: For 13911/14416 co-relation queries the response was YES. [2025-02-06 13:11:52,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21616 conditions, 6736 events. 4311/6736 cut-off events. For 13911/14416 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 38302 event pairs, 3330 based on Foata normal form. 0/6274 useless extension candidates. Maximal degree in co-relation 11319. Up to 6152 conditions per place. [2025-02-06 13:11:52,167 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 60 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2025-02-06 13:11:52,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 74 transitions, 602 flow [2025-02-06 13:11:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2025-02-06 13:11:52,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2025-02-06 13:11:52,169 INFO L175 Difference]: Start difference. First operand has 97 places, 76 transitions, 472 flow. Second operand 4 states and 90 transitions. [2025-02-06 13:11:52,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 74 transitions, 602 flow [2025-02-06 13:11:52,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 74 transitions, 567 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-02-06 13:11:52,179 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 447 flow [2025-02-06 13:11:52,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=447, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2025-02-06 13:11:52,179 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2025-02-06 13:11:52,179 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 447 flow [2025-02-06 13:11:52,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:52,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:52,179 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:52,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:11:52,180 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:52,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1818589156, now seen corresponding path program 1 times [2025-02-06 13:11:52,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:52,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057709066] [2025-02-06 13:11:52,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:52,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:52,185 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:11:52,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:11:52,190 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:52,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:11:52,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:52,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057709066] [2025-02-06 13:11:52,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057709066] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:52,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628744231] [2025-02-06 13:11:52,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:52,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:52,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:52,334 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:52,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:11:52,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:11:52,406 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:11:52,406 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:52,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:52,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:11:52,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:52,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:11:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:11:52,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:11:52,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628744231] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:52,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:11:52,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2025-02-06 13:11:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103941061] [2025-02-06 13:11:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:52,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:11:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:52,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:11:52,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:11:52,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-06 13:11:52,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 447 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:52,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:52,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-06 13:11:52,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:53,155 INFO L124 PetriNetUnfolderBase]: 4130/6416 cut-off events. [2025-02-06 13:11:53,155 INFO L125 PetriNetUnfolderBase]: For 12813/13403 co-relation queries the response was YES. [2025-02-06 13:11:53,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20235 conditions, 6416 events. 4130/6416 cut-off events. For 12813/13403 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 35861 event pairs, 1962 based on Foata normal form. 0/6064 useless extension candidates. Maximal degree in co-relation 10812. Up to 3487 conditions per place. [2025-02-06 13:11:53,213 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 86 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2025-02-06 13:11:53,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 109 transitions, 803 flow [2025-02-06 13:11:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:11:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:11:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2025-02-06 13:11:53,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48830409356725146 [2025-02-06 13:11:53,215 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 447 flow. Second operand 6 states and 167 transitions. [2025-02-06 13:11:53,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 109 transitions, 803 flow [2025-02-06 13:11:53,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 795 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:53,228 INFO L231 Difference]: Finished difference. Result has 97 places, 75 transitions, 488 flow [2025-02-06 13:11:53,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=488, PETRI_PLACES=97, PETRI_TRANSITIONS=75} [2025-02-06 13:11:53,229 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2025-02-06 13:11:53,229 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 75 transitions, 488 flow [2025-02-06 13:11:53,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:53,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:53,230 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:53,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 13:11:53,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 13:11:53,430 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:53,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash 446717741, now seen corresponding path program 2 times [2025-02-06 13:11:53,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:53,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435325361] [2025-02-06 13:11:53,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:53,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:53,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:11:53,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:11:53,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:53,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:11:53,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:53,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435325361] [2025-02-06 13:11:53,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435325361] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:53,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543144743] [2025-02-06 13:11:53,772 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:53,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:53,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:53,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:53,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:11:53,836 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:11:53,852 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:11:53,853 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:53,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:53,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 13:11:53,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:53,860 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 [2025-02-06 13:11:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:11:53,922 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 [2025-02-06 13:11:53,928 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:11:53,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:11:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:11:54,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:54,182 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 [2025-02-06 13:11:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:11:54,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543144743] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:54,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:54,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2025-02-06 13:11:54,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707054667] [2025-02-06 13:11:54,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:54,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:11:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:54,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:11:54,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:11:54,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 57 [2025-02-06 13:11:54,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 75 transitions, 488 flow. Second operand has 22 states, 22 states have (on average 14.272727272727273) internal successors, (314), 22 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:54,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:54,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 57 [2025-02-06 13:11:54,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:56,623 INFO L124 PetriNetUnfolderBase]: 8412/12373 cut-off events. [2025-02-06 13:11:56,623 INFO L125 PetriNetUnfolderBase]: For 19974/20357 co-relation queries the response was YES. [2025-02-06 13:11:56,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42987 conditions, 12373 events. 8412/12373 cut-off events. For 19974/20357 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 72825 event pairs, 1724 based on Foata normal form. 280/12290 useless extension candidates. Maximal degree in co-relation 30540. Up to 2861 conditions per place. [2025-02-06 13:11:56,707 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 258 selfloop transitions, 36 changer transitions 0/300 dead transitions. [2025-02-06 13:11:56,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 300 transitions, 2126 flow [2025-02-06 13:11:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 13:11:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 13:11:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 453 transitions. [2025-02-06 13:11:56,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4182825484764543 [2025-02-06 13:11:56,710 INFO L175 Difference]: Start difference. First operand has 97 places, 75 transitions, 488 flow. Second operand 19 states and 453 transitions. [2025-02-06 13:11:56,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 300 transitions, 2126 flow [2025-02-06 13:11:56,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 300 transitions, 2069 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:11:56,751 INFO L231 Difference]: Finished difference. Result has 112 places, 85 transitions, 636 flow [2025-02-06 13:11:56,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=636, PETRI_PLACES=112, PETRI_TRANSITIONS=85} [2025-02-06 13:11:56,752 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 55 predicate places. [2025-02-06 13:11:56,752 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 85 transitions, 636 flow [2025-02-06 13:11:56,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.272727272727273) internal successors, (314), 22 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:56,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:56,753 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:56,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 13:11:56,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:56,954 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:56,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash 992718358, now seen corresponding path program 1 times [2025-02-06 13:11:56,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:56,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488957145] [2025-02-06 13:11:56,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:56,962 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:11:56,969 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:11:56,969 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:56,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:57,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:57,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488957145] [2025-02-06 13:11:57,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488957145] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:57,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859435569] [2025-02-06 13:11:57,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:57,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:57,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:57,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:57,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:11:57,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:11:57,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:11:57,122 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:57,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:57,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:11:57,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:57,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859435569] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:57,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:57,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:11:57,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897309505] [2025-02-06 13:11:57,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:57,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:11:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:57,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:11:57,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:11:57,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:11:57,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 85 transitions, 636 flow. Second operand has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:57,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:57,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:11:57,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:58,027 INFO L124 PetriNetUnfolderBase]: 5864/8899 cut-off events. [2025-02-06 13:11:58,027 INFO L125 PetriNetUnfolderBase]: For 30854/31686 co-relation queries the response was YES. [2025-02-06 13:11:58,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33318 conditions, 8899 events. 5864/8899 cut-off events. For 30854/31686 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 49583 event pairs, 3233 based on Foata normal form. 152/8829 useless extension candidates. Maximal degree in co-relation 25168. Up to 4848 conditions per place. [2025-02-06 13:11:58,083 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 124 selfloop transitions, 24 changer transitions 0/156 dead transitions. [2025-02-06 13:11:58,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 156 transitions, 1341 flow [2025-02-06 13:11:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:11:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:11:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2025-02-06 13:11:58,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4368421052631579 [2025-02-06 13:11:58,085 INFO L175 Difference]: Start difference. First operand has 112 places, 85 transitions, 636 flow. Second operand 10 states and 249 transitions. [2025-02-06 13:11:58,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 156 transitions, 1341 flow [2025-02-06 13:11:58,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 156 transitions, 1286 flow, removed 8 selfloop flow, removed 10 redundant places. [2025-02-06 13:11:58,113 INFO L231 Difference]: Finished difference. Result has 114 places, 89 transitions, 691 flow [2025-02-06 13:11:58,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=691, PETRI_PLACES=114, PETRI_TRANSITIONS=89} [2025-02-06 13:11:58,113 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2025-02-06 13:11:58,114 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 89 transitions, 691 flow [2025-02-06 13:11:58,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:58,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:58,114 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:58,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 13:11:58,314 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,SelfDestructingSolverStorable17 [2025-02-06 13:11:58,315 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:58,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash 6248755, now seen corresponding path program 1 times [2025-02-06 13:11:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932324112] [2025-02-06 13:11:58,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:58,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:58,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:11:58,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:11:58,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:58,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:58,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:58,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932324112] [2025-02-06 13:11:58,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932324112] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:58,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:58,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:58,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377232000] [2025-02-06 13:11:58,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:58,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:58,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:58,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:58,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:58,593 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-06 13:11:58,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 89 transitions, 691 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:58,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:58,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-06 13:11:58,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:59,194 INFO L124 PetriNetUnfolderBase]: 5316/8377 cut-off events. [2025-02-06 13:11:59,194 INFO L125 PetriNetUnfolderBase]: For 31793/32332 co-relation queries the response was YES. [2025-02-06 13:11:59,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32399 conditions, 8377 events. 5316/8377 cut-off events. For 31793/32332 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 48389 event pairs, 4166 based on Foata normal form. 1/8119 useless extension candidates. Maximal degree in co-relation 22986. Up to 7451 conditions per place. [2025-02-06 13:11:59,253 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 76 selfloop transitions, 2 changer transitions 17/104 dead transitions. [2025-02-06 13:11:59,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 104 transitions, 955 flow [2025-02-06 13:11:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:11:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:11:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2025-02-06 13:11:59,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2025-02-06 13:11:59,254 INFO L175 Difference]: Start difference. First operand has 114 places, 89 transitions, 691 flow. Second operand 5 states and 130 transitions. [2025-02-06 13:11:59,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 104 transitions, 955 flow [2025-02-06 13:11:59,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 104 transitions, 920 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-02-06 13:11:59,279 INFO L231 Difference]: Finished difference. Result has 113 places, 87 transitions, 642 flow [2025-02-06 13:11:59,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=642, PETRI_PLACES=113, PETRI_TRANSITIONS=87} [2025-02-06 13:11:59,280 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2025-02-06 13:11:59,280 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 87 transitions, 642 flow [2025-02-06 13:11:59,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:59,280 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:59,280 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:59,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-06 13:11:59,280 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:11:59,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:59,281 INFO L85 PathProgramCache]: Analyzing trace with hash 785421924, now seen corresponding path program 1 times [2025-02-06 13:11:59,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:59,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506321187] [2025-02-06 13:11:59,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:59,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:59,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:11:59,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:11:59,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:59,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:59,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:59,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506321187] [2025-02-06 13:11:59,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506321187] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:59,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336477705] [2025-02-06 13:11:59,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:59,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:59,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:59,370 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:59,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 13:11:59,427 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:11:59,448 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:11:59,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:59,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:59,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:11:59,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:59,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:59,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336477705] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:59,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:11:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 10 [2025-02-06 13:11:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199391489] [2025-02-06 13:11:59,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:59,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:11:59,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:59,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:11:59,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:11:59,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-06 13:11:59,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 87 transitions, 642 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:59,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:59,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-06 13:11:59,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:00,056 INFO L124 PetriNetUnfolderBase]: 4952/7688 cut-off events. [2025-02-06 13:12:00,056 INFO L125 PetriNetUnfolderBase]: For 28990/29583 co-relation queries the response was YES. [2025-02-06 13:12:00,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29116 conditions, 7688 events. 4952/7688 cut-off events. For 28990/29583 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 44202 event pairs, 3794 based on Foata normal form. 2/7444 useless extension candidates. Maximal degree in co-relation 29077. Up to 7008 conditions per place. [2025-02-06 13:12:00,113 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 55 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2025-02-06 13:12:00,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 79 transitions, 688 flow [2025-02-06 13:12:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:12:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:12:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2025-02-06 13:12:00,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39649122807017545 [2025-02-06 13:12:00,114 INFO L175 Difference]: Start difference. First operand has 113 places, 87 transitions, 642 flow. Second operand 5 states and 113 transitions. [2025-02-06 13:12:00,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 79 transitions, 688 flow [2025-02-06 13:12:00,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 79 transitions, 648 flow, removed 12 selfloop flow, removed 7 redundant places. [2025-02-06 13:12:00,144 INFO L231 Difference]: Finished difference. Result has 103 places, 79 transitions, 538 flow [2025-02-06 13:12:00,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=538, PETRI_PLACES=103, PETRI_TRANSITIONS=79} [2025-02-06 13:12:00,145 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2025-02-06 13:12:00,145 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 79 transitions, 538 flow [2025-02-06 13:12:00,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:00,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:00,145 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:00,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 13:12:00,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:00,346 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:00,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:00,346 INFO L85 PathProgramCache]: Analyzing trace with hash -261808621, now seen corresponding path program 1 times [2025-02-06 13:12:00,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:00,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956145956] [2025-02-06 13:12:00,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:00,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:00,352 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:12:00,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:12:00,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:00,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:12:00,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:00,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956145956] [2025-02-06 13:12:00,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956145956] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:12:00,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:12:00,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:12:00,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062076935] [2025-02-06 13:12:00,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:12:00,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:12:00,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:00,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:12:00,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:12:00,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:12:00,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 79 transitions, 538 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:00,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:00,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:12:00,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:01,300 INFO L124 PetriNetUnfolderBase]: 7798/12036 cut-off events. [2025-02-06 13:12:01,301 INFO L125 PetriNetUnfolderBase]: For 35602/35907 co-relation queries the response was YES. [2025-02-06 13:12:01,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43772 conditions, 12036 events. 7798/12036 cut-off events. For 35602/35907 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 73099 event pairs, 2447 based on Foata normal form. 266/12052 useless extension candidates. Maximal degree in co-relation 25177. Up to 6112 conditions per place. [2025-02-06 13:12:01,371 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 168 selfloop transitions, 17 changer transitions 0/193 dead transitions. [2025-02-06 13:12:01,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 193 transitions, 1710 flow [2025-02-06 13:12:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:12:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:12:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2025-02-06 13:12:01,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5350877192982456 [2025-02-06 13:12:01,373 INFO L175 Difference]: Start difference. First operand has 103 places, 79 transitions, 538 flow. Second operand 6 states and 183 transitions. [2025-02-06 13:12:01,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 193 transitions, 1710 flow [2025-02-06 13:12:01,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 193 transitions, 1680 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:12:01,399 INFO L231 Difference]: Finished difference. Result has 108 places, 91 transitions, 685 flow [2025-02-06 13:12:01,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=685, PETRI_PLACES=108, PETRI_TRANSITIONS=91} [2025-02-06 13:12:01,400 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2025-02-06 13:12:01,400 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 91 transitions, 685 flow [2025-02-06 13:12:01,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:01,401 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:01,401 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:01,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-06 13:12:01,401 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:01,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash -450596723, now seen corresponding path program 2 times [2025-02-06 13:12:01,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:01,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948882827] [2025-02-06 13:12:01,402 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:12:01,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:01,408 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:12:01,410 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 22 statements. [2025-02-06 13:12:01,411 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:12:01,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:12:01,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948882827] [2025-02-06 13:12:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948882827] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:12:01,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:12:01,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:12:01,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706287711] [2025-02-06 13:12:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:12:01,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:12:01,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:01,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:12:01,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:12:01,455 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:12:01,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 91 transitions, 685 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:01,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:01,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:12:01,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:02,608 INFO L124 PetriNetUnfolderBase]: 11139/16960 cut-off events. [2025-02-06 13:12:02,608 INFO L125 PetriNetUnfolderBase]: For 61560/62040 co-relation queries the response was YES. [2025-02-06 13:12:02,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64517 conditions, 16960 events. 11139/16960 cut-off events. For 61560/62040 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 103919 event pairs, 4227 based on Foata normal form. 292/16823 useless extension candidates. Maximal degree in co-relation 39564. Up to 6868 conditions per place. [2025-02-06 13:12:02,707 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 185 selfloop transitions, 14 changer transitions 0/207 dead transitions. [2025-02-06 13:12:02,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 207 transitions, 1934 flow [2025-02-06 13:12:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:12:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:12:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2025-02-06 13:12:02,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2025-02-06 13:12:02,708 INFO L175 Difference]: Start difference. First operand has 108 places, 91 transitions, 685 flow. Second operand 6 states and 180 transitions. [2025-02-06 13:12:02,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 207 transitions, 1934 flow [2025-02-06 13:12:02,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 207 transitions, 1905 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-02-06 13:12:02,766 INFO L231 Difference]: Finished difference. Result has 116 places, 99 transitions, 831 flow [2025-02-06 13:12:02,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=831, PETRI_PLACES=116, PETRI_TRANSITIONS=99} [2025-02-06 13:12:02,766 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2025-02-06 13:12:02,766 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 99 transitions, 831 flow [2025-02-06 13:12:02,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:02,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:02,767 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:02,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-06 13:12:02,767 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:02,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:02,767 INFO L85 PathProgramCache]: Analyzing trace with hash 292774205, now seen corresponding path program 3 times [2025-02-06 13:12:02,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:02,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258099658] [2025-02-06 13:12:02,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:12:02,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:02,774 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-02-06 13:12:02,776 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 22 statements. [2025-02-06 13:12:02,776 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 13:12:02,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:12:02,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:02,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258099658] [2025-02-06 13:12:02,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258099658] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:12:02,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:12:02,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:12:02,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971243680] [2025-02-06 13:12:02,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:12:02,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:12:02,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:02,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:12:02,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:12:02,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:12:02,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 99 transitions, 831 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:02,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:02,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:12:02,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:04,310 INFO L124 PetriNetUnfolderBase]: 10194/15596 cut-off events. [2025-02-06 13:12:04,310 INFO L125 PetriNetUnfolderBase]: For 57928/58567 co-relation queries the response was YES. [2025-02-06 13:12:04,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58609 conditions, 15596 events. 10194/15596 cut-off events. For 57928/58567 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 92098 event pairs, 2051 based on Foata normal form. 266/15616 useless extension candidates. Maximal degree in co-relation 47066. Up to 6263 conditions per place. [2025-02-06 13:12:04,427 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 157 selfloop transitions, 27 changer transitions 0/192 dead transitions. [2025-02-06 13:12:04,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 1834 flow [2025-02-06 13:12:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:12:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:12:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2025-02-06 13:12:04,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5292397660818714 [2025-02-06 13:12:04,428 INFO L175 Difference]: Start difference. First operand has 116 places, 99 transitions, 831 flow. Second operand 6 states and 181 transitions. [2025-02-06 13:12:04,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 1834 flow [2025-02-06 13:12:04,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 192 transitions, 1811 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-02-06 13:12:04,484 INFO L231 Difference]: Finished difference. Result has 122 places, 101 transitions, 927 flow [2025-02-06 13:12:04,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=927, PETRI_PLACES=122, PETRI_TRANSITIONS=101} [2025-02-06 13:12:04,484 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2025-02-06 13:12:04,484 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 101 transitions, 927 flow [2025-02-06 13:12:04,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:04,485 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:04,485 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:04,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-02-06 13:12:04,485 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:04,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash 416980095, now seen corresponding path program 2 times [2025-02-06 13:12:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:04,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882485429] [2025-02-06 13:12:04,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:12:04,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:04,492 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:12:04,502 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:12:04,502 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:12:04,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:12:04,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:04,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882485429] [2025-02-06 13:12:04,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882485429] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:04,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322793583] [2025-02-06 13:12:04,741 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:12:04,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:04,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:04,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:12:04,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 13:12:04,805 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:12:04,830 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:12:04,830 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:12:04,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:04,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 13:12:04,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:04,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:12:04,962 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2025-02-06 13:12:04,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2025-02-06 13:12:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:12:05,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:12:05,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322793583] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:12:05,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:12:05,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 20 [2025-02-06 13:12:05,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758504735] [2025-02-06 13:12:05,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:12:05,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:12:05,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:05,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:12:05,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:12:05,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 57 [2025-02-06 13:12:05,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 101 transitions, 927 flow. Second operand has 22 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:05,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:05,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 57 [2025-02-06 13:12:05,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:08,303 INFO L124 PetriNetUnfolderBase]: 10441/15845 cut-off events. [2025-02-06 13:12:08,304 INFO L125 PetriNetUnfolderBase]: For 61875/62279 co-relation queries the response was YES. [2025-02-06 13:12:08,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62272 conditions, 15845 events. 10441/15845 cut-off events. For 61875/62279 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 93035 event pairs, 1405 based on Foata normal form. 338/15871 useless extension candidates. Maximal degree in co-relation 44046. Up to 3759 conditions per place. [2025-02-06 13:12:08,481 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 201 selfloop transitions, 46 changer transitions 0/255 dead transitions. [2025-02-06 13:12:08,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 255 transitions, 2445 flow [2025-02-06 13:12:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 13:12:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 13:12:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 359 transitions. [2025-02-06 13:12:08,483 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3314866112650046 [2025-02-06 13:12:08,483 INFO L175 Difference]: Start difference. First operand has 122 places, 101 transitions, 927 flow. Second operand 19 states and 359 transitions. [2025-02-06 13:12:08,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 255 transitions, 2445 flow [2025-02-06 13:12:08,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 255 transitions, 2348 flow, removed 19 selfloop flow, removed 4 redundant places. [2025-02-06 13:12:08,603 INFO L231 Difference]: Finished difference. Result has 137 places, 114 transitions, 1163 flow [2025-02-06 13:12:08,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1163, PETRI_PLACES=137, PETRI_TRANSITIONS=114} [2025-02-06 13:12:08,603 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2025-02-06 13:12:08,603 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 114 transitions, 1163 flow [2025-02-06 13:12:08,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:08,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:08,604 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:08,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 13:12:08,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:08,804 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:08,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:08,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1609416128, now seen corresponding path program 1 times [2025-02-06 13:12:08,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:08,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487449905] [2025-02-06 13:12:08,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:08,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:08,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:12:08,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:12:08,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:08,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:12:08,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:08,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487449905] [2025-02-06 13:12:08,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487449905] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:08,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435623504] [2025-02-06 13:12:08,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:08,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:08,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:08,877 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) [2025-02-06 13:12:08,879 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 [2025-02-06 13:12:08,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:12:08,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:12:08,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:08,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:08,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:12:08,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:12:08,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:12:09,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435623504] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:09,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:12:09,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-06 13:12:09,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249579061] [2025-02-06 13:12:09,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:12:09,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:12:09,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:09,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:12:09,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:12:09,030 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:12:09,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 114 transitions, 1163 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:09,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:09,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:12:09,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:10,177 INFO L124 PetriNetUnfolderBase]: 11802/17712 cut-off events. [2025-02-06 13:12:10,177 INFO L125 PetriNetUnfolderBase]: For 72781/73124 co-relation queries the response was YES. [2025-02-06 13:12:10,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71015 conditions, 17712 events. 11802/17712 cut-off events. For 72781/73124 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 105536 event pairs, 3681 based on Foata normal form. 546/17312 useless extension candidates. Maximal degree in co-relation 53002. Up to 9840 conditions per place. [2025-02-06 13:12:10,345 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 154 selfloop transitions, 12 changer transitions 0/174 dead transitions. [2025-02-06 13:12:10,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 174 transitions, 2230 flow [2025-02-06 13:12:10,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:12:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:12:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2025-02-06 13:12:10,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2025-02-06 13:12:10,346 INFO L175 Difference]: Start difference. First operand has 137 places, 114 transitions, 1163 flow. Second operand 5 states and 126 transitions. [2025-02-06 13:12:10,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 174 transitions, 2230 flow [2025-02-06 13:12:10,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 174 transitions, 2185 flow, removed 9 selfloop flow, removed 10 redundant places. [2025-02-06 13:12:10,434 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 1141 flow [2025-02-06 13:12:10,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1141, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2025-02-06 13:12:10,434 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2025-02-06 13:12:10,434 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 1141 flow [2025-02-06 13:12:10,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:10,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:10,435 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:10,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 13:12:10,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:10,635 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:10,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash 41481525, now seen corresponding path program 1 times [2025-02-06 13:12:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:10,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58506216] [2025-02-06 13:12:10,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:10,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:10,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:12:10,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:12:10,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:10,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:12:10,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:10,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58506216] [2025-02-06 13:12:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58506216] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:10,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486454578] [2025-02-06 13:12:10,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:10,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:10,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:10,858 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) [2025-02-06 13:12:10,861 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 [2025-02-06 13:12:10,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:12:10,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:12:10,935 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:10,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:10,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:12:10,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:12:11,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:11,144 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 [2025-02-06 13:12:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:12:11,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486454578] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:12:11,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:12:11,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-02-06 13:12:11,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10728029] [2025-02-06 13:12:11,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:12:11,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:12:11,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:11,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:12:11,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:12:11,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:12:11,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 1141 flow. Second operand has 22 states, 22 states have (on average 16.772727272727273) internal successors, (369), 22 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:11,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:11,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:12:11,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:12,908 INFO L124 PetriNetUnfolderBase]: 8886/13871 cut-off events. [2025-02-06 13:12:12,908 INFO L125 PetriNetUnfolderBase]: For 70113/70493 co-relation queries the response was YES. [2025-02-06 13:12:12,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54437 conditions, 13871 events. 8886/13871 cut-off events. For 70113/70493 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 82401 event pairs, 3165 based on Foata normal form. 523/13878 useless extension candidates. Maximal degree in co-relation 39288. Up to 4121 conditions per place. [2025-02-06 13:12:13,019 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 146 selfloop transitions, 25 changer transitions 16/196 dead transitions. [2025-02-06 13:12:13,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 196 transitions, 1935 flow [2025-02-06 13:12:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:12:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:12:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 328 transitions. [2025-02-06 13:12:13,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2025-02-06 13:12:13,020 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 1141 flow. Second operand 14 states and 328 transitions. [2025-02-06 13:12:13,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 196 transitions, 1935 flow [2025-02-06 13:12:13,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 196 transitions, 1864 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-06 13:12:13,078 INFO L231 Difference]: Finished difference. Result has 143 places, 96 transitions, 877 flow [2025-02-06 13:12:13,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=877, PETRI_PLACES=143, PETRI_TRANSITIONS=96} [2025-02-06 13:12:13,078 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2025-02-06 13:12:13,078 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 96 transitions, 877 flow [2025-02-06 13:12:13,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.772727272727273) internal successors, (369), 22 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:13,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:13,079 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:13,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-06 13:12:13,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-06 13:12:13,279 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:13,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1845917751, now seen corresponding path program 1 times [2025-02-06 13:12:13,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:13,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662088377] [2025-02-06 13:12:13,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:13,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:13,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 13:12:13,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:12:13,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:13,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:12:13,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:13,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662088377] [2025-02-06 13:12:13,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662088377] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:13,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260366633] [2025-02-06 13:12:13,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:13,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:13,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:13,368 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) [2025-02-06 13:12:13,370 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 [2025-02-06 13:12:13,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 13:12:13,453 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:12:13,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:13,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:13,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:12:13,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:12:13,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:12:13,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260366633] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:13,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:12:13,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2025-02-06 13:12:13,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572450150] [2025-02-06 13:12:13,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:12:13,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:12:13,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:13,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:12:13,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:12:13,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:12:13,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 96 transitions, 877 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:13,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:13,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:12:13,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:14,393 INFO L124 PetriNetUnfolderBase]: 7874/12093 cut-off events. [2025-02-06 13:12:14,393 INFO L125 PetriNetUnfolderBase]: For 59074/59412 co-relation queries the response was YES. [2025-02-06 13:12:14,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47380 conditions, 12093 events. 7874/12093 cut-off events. For 59074/59412 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 69825 event pairs, 2072 based on Foata normal form. 65/11649 useless extension candidates. Maximal degree in co-relation 39922. Up to 8159 conditions per place. [2025-02-06 13:12:14,518 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 90 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2025-02-06 13:12:14,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 117 transitions, 1186 flow [2025-02-06 13:12:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:12:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:12:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2025-02-06 13:12:14,519 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4280701754385965 [2025-02-06 13:12:14,519 INFO L175 Difference]: Start difference. First operand has 143 places, 96 transitions, 877 flow. Second operand 5 states and 122 transitions. [2025-02-06 13:12:14,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 117 transitions, 1186 flow [2025-02-06 13:12:14,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 117 transitions, 1087 flow, removed 10 selfloop flow, removed 20 redundant places. [2025-02-06 13:12:14,569 INFO L231 Difference]: Finished difference. Result has 128 places, 94 transitions, 795 flow [2025-02-06 13:12:14,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=795, PETRI_PLACES=128, PETRI_TRANSITIONS=94} [2025-02-06 13:12:14,570 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2025-02-06 13:12:14,570 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 94 transitions, 795 flow [2025-02-06 13:12:14,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:14,570 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:14,570 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:14,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 13:12:14,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-06 13:12:14,771 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:14,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash -840658161, now seen corresponding path program 2 times [2025-02-06 13:12:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:14,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880076352] [2025-02-06 13:12:14,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:12:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:14,779 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:12:14,789 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:12:14,789 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:12:14,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:12:14,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:14,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880076352] [2025-02-06 13:12:14,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880076352] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:14,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432369253] [2025-02-06 13:12:14,882 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:12:14,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:14,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:14,885 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) [2025-02-06 13:12:14,886 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 [2025-02-06 13:12:14,942 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:12:14,966 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:12:14,966 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:12:14,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:14,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:12:14,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:12:15,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:12:15,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432369253] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:12:15,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:12:15,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-02-06 13:12:15,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861045098] [2025-02-06 13:12:15,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:12:15,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:12:15,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:15,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:12:15,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-02-06 13:12:15,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:12:15,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 94 transitions, 795 flow. Second operand has 19 states, 19 states have (on average 16.94736842105263) internal successors, (322), 19 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:15,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:15,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:12:15,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:17,085 INFO L124 PetriNetUnfolderBase]: 11892/18397 cut-off events. [2025-02-06 13:12:17,085 INFO L125 PetriNetUnfolderBase]: For 86403/86953 co-relation queries the response was YES. [2025-02-06 13:12:17,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71841 conditions, 18397 events. 11892/18397 cut-off events. For 86403/86953 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 113231 event pairs, 6210 based on Foata normal form. 203/18170 useless extension candidates. Maximal degree in co-relation 44565. Up to 9499 conditions per place. [2025-02-06 13:12:17,279 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 169 selfloop transitions, 40 changer transitions 0/218 dead transitions. [2025-02-06 13:12:17,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 218 transitions, 2075 flow [2025-02-06 13:12:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 13:12:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 13:12:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 357 transitions. [2025-02-06 13:12:17,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39144736842105265 [2025-02-06 13:12:17,280 INFO L175 Difference]: Start difference. First operand has 128 places, 94 transitions, 795 flow. Second operand 16 states and 357 transitions. [2025-02-06 13:12:17,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 218 transitions, 2075 flow [2025-02-06 13:12:17,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 218 transitions, 2036 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-02-06 13:12:17,389 INFO L231 Difference]: Finished difference. Result has 145 places, 116 transitions, 1183 flow [2025-02-06 13:12:17,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1183, PETRI_PLACES=145, PETRI_TRANSITIONS=116} [2025-02-06 13:12:17,390 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2025-02-06 13:12:17,390 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 116 transitions, 1183 flow [2025-02-06 13:12:17,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.94736842105263) internal successors, (322), 19 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:17,390 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:17,390 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:17,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-06 13:12:17,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-06 13:12:17,591 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:17,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash -372420728, now seen corresponding path program 1 times [2025-02-06 13:12:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:17,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302981441] [2025-02-06 13:12:17,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:17,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:17,598 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 13:12:17,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 13:12:17,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:17,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-06 13:12:17,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:17,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302981441] [2025-02-06 13:12:17,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302981441] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:17,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520830732] [2025-02-06 13:12:17,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:17,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:17,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:17,727 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) [2025-02-06 13:12:17,729 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 [2025-02-06 13:12:17,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 13:12:17,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 13:12:17,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:17,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:17,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:12:17,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-06 13:12:17,962 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:17,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-02-06 13:12:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-06 13:12:18,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520830732] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:12:18,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:12:18,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-06 13:12:18,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743042484] [2025-02-06 13:12:18,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:12:18,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 13:12:18,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:18,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 13:12:18,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:12:18,213 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2025-02-06 13:12:18,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 116 transitions, 1183 flow. Second operand has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:18,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:18,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2025-02-06 13:12:18,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:21,705 INFO L124 PetriNetUnfolderBase]: 24547/38182 cut-off events. [2025-02-06 13:12:21,705 INFO L125 PetriNetUnfolderBase]: For 186560/188291 co-relation queries the response was YES. [2025-02-06 13:12:22,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150418 conditions, 38182 events. 24547/38182 cut-off events. For 186560/188291 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 264239 event pairs, 3340 based on Foata normal form. 78/37203 useless extension candidates. Maximal degree in co-relation 97045. Up to 5250 conditions per place. [2025-02-06 13:12:22,602 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 434 selfloop transitions, 83 changer transitions 0/530 dead transitions. [2025-02-06 13:12:22,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 530 transitions, 5148 flow [2025-02-06 13:12:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-06 13:12:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-02-06 13:12:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 661 transitions. [2025-02-06 13:12:22,604 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5041952707856598 [2025-02-06 13:12:22,604 INFO L175 Difference]: Start difference. First operand has 145 places, 116 transitions, 1183 flow. Second operand 23 states and 661 transitions. [2025-02-06 13:12:22,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 530 transitions, 5148 flow [2025-02-06 13:12:22,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 530 transitions, 5142 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-02-06 13:12:22,912 INFO L231 Difference]: Finished difference. Result has 185 places, 190 transitions, 2305 flow [2025-02-06 13:12:22,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2305, PETRI_PLACES=185, PETRI_TRANSITIONS=190} [2025-02-06 13:12:22,913 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2025-02-06 13:12:22,913 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 190 transitions, 2305 flow [2025-02-06 13:12:22,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:22,914 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:22,914 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:22,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 13:12:23,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-06 13:12:23,114 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:23,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash 342086540, now seen corresponding path program 2 times [2025-02-06 13:12:23,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:23,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029659226] [2025-02-06 13:12:23,115 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:12:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:23,120 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-06 13:12:23,123 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 32 statements. [2025-02-06 13:12:23,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:12:23,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-06 13:12:23,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:23,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029659226] [2025-02-06 13:12:23,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029659226] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:12:23,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:12:23,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:12:23,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733759736] [2025-02-06 13:12:23,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:12:23,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:12:23,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:23,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:12:23,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:12:23,245 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-06 13:12:23,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 190 transitions, 2305 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:23,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:23,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-06 13:12:23,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:30,255 INFO L124 PetriNetUnfolderBase]: 38160/56488 cut-off events. [2025-02-06 13:12:30,255 INFO L125 PetriNetUnfolderBase]: For 526464/528342 co-relation queries the response was YES. [2025-02-06 13:12:30,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274488 conditions, 56488 events. 38160/56488 cut-off events. For 526464/528342 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 376466 event pairs, 10982 based on Foata normal form. 155/56469 useless extension candidates. Maximal degree in co-relation 236268. Up to 25208 conditions per place. [2025-02-06 13:12:31,221 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 260 selfloop transitions, 104 changer transitions 0/375 dead transitions. [2025-02-06 13:12:31,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 375 transitions, 4766 flow [2025-02-06 13:12:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:12:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:12:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2025-02-06 13:12:31,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4543859649122807 [2025-02-06 13:12:31,223 INFO L175 Difference]: Start difference. First operand has 185 places, 190 transitions, 2305 flow. Second operand 10 states and 259 transitions. [2025-02-06 13:12:31,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 375 transitions, 4766 flow [2025-02-06 13:12:33,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 375 transitions, 4679 flow, removed 21 selfloop flow, removed 4 redundant places. [2025-02-06 13:12:33,399 INFO L231 Difference]: Finished difference. Result has 196 places, 238 transitions, 3339 flow [2025-02-06 13:12:33,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2247, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3339, PETRI_PLACES=196, PETRI_TRANSITIONS=238} [2025-02-06 13:12:33,400 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 139 predicate places. [2025-02-06 13:12:33,400 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 238 transitions, 3339 flow [2025-02-06 13:12:33,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:33,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:33,400 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:33,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-02-06 13:12:33,400 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:33,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:33,401 INFO L85 PathProgramCache]: Analyzing trace with hash 340299080, now seen corresponding path program 3 times [2025-02-06 13:12:33,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:33,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219003993] [2025-02-06 13:12:33,401 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:12:33,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:33,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 4 equivalence classes. [2025-02-06 13:12:33,408 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 32 statements. [2025-02-06 13:12:33,409 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 13:12:33,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-06 13:12:33,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:33,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219003993] [2025-02-06 13:12:33,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219003993] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:12:33,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:12:33,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:12:33,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648740649] [2025-02-06 13:12:33,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:12:33,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:12:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:33,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:12:33,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:12:33,530 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2025-02-06 13:12:33,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 238 transitions, 3339 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:33,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:33,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2025-02-06 13:12:33,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:41,409 INFO L124 PetriNetUnfolderBase]: 40732/60132 cut-off events. [2025-02-06 13:12:41,410 INFO L125 PetriNetUnfolderBase]: For 670050/671844 co-relation queries the response was YES. [2025-02-06 13:12:42,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308108 conditions, 60132 events. 40732/60132 cut-off events. For 670050/671844 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 403907 event pairs, 2665 based on Foata normal form. 258/60338 useless extension candidates. Maximal degree in co-relation 276605. Up to 21588 conditions per place. [2025-02-06 13:12:42,457 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 264 selfloop transitions, 137 changer transitions 0/412 dead transitions. [2025-02-06 13:12:42,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 412 transitions, 5771 flow [2025-02-06 13:12:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:12:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:12:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2025-02-06 13:12:42,458 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4370015948963317 [2025-02-06 13:12:42,458 INFO L175 Difference]: Start difference. First operand has 196 places, 238 transitions, 3339 flow. Second operand 11 states and 274 transitions. [2025-02-06 13:12:42,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 412 transitions, 5771 flow [2025-02-06 13:12:46,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 412 transitions, 5634 flow, removed 65 selfloop flow, removed 2 redundant places. [2025-02-06 13:12:46,183 INFO L231 Difference]: Finished difference. Result has 208 places, 274 transitions, 4335 flow [2025-02-06 13:12:46,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3258, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4335, PETRI_PLACES=208, PETRI_TRANSITIONS=274} [2025-02-06 13:12:46,184 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 151 predicate places. [2025-02-06 13:12:46,184 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 274 transitions, 4335 flow [2025-02-06 13:12:46,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:46,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:46,184 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:46,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-02-06 13:12:46,184 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2025-02-06 13:12:46,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:46,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1029470383, now seen corresponding path program 1 times [2025-02-06 13:12:46,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:46,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767189468] [2025-02-06 13:12:46,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:46,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:46,190 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-06 13:12:46,195 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 13:12:46,195 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:46,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:12:46,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:46,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767189468] [2025-02-06 13:12:46,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767189468] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:46,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331989553] [2025-02-06 13:12:46,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:12:46,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:46,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:46,269 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:12:46,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 13:12:46,340 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-06 13:12:46,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 13:12:46,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:46,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:46,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:12:46,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:12:46,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:12:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331989553] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:46,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:12:46,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-06 13:12:46,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105911927] [2025-02-06 13:12:46,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:12:46,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:12:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:46,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:12:46,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:12:46,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2025-02-06 13:12:46,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 274 transitions, 4335 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:46,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:46,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2025-02-06 13:12:46,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand