./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d 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-more-dec-subseq.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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:40:37,992 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:40:38,057 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:40:38,063 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:40:38,063 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:40:38,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:40:38,087 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:40:38,087 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:40:38,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:40:38,087 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:40:38,087 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:40:38,087 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:40:38,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:40:38,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:40:38,089 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:40:38,089 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:40:38,089 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:40:38,090 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:40:38,090 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:40:38,090 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:40:38,090 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:40:38,090 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:40:38,090 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:40:38,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:40:38,090 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:40:38,091 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:40:38,091 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:40:38,091 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:40:38,091 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:40:38,091 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:40:38,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:40:38,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:40:38,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:40:38,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:40:38,092 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:40:38,092 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:40:38,092 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:40:38,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:40:38,092 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:40:38,092 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:40:38,092 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:40:38,093 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:40:38,093 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 -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2025-02-08 08:40:38,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:40:38,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:40:38,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:40:38,389 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:40:38,389 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:40:38,391 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2025-02-08 08:40:39,644 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9863a515a/302f950d80b94d90a7ee191607ef9325/FLAGdbfdea0c2 [2025-02-08 08:40:39,939 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:40:39,940 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2025-02-08 08:40:39,948 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9863a515a/302f950d80b94d90a7ee191607ef9325/FLAGdbfdea0c2 [2025-02-08 08:40:39,969 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9863a515a/302f950d80b94d90a7ee191607ef9325 [2025-02-08 08:40:39,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:40:39,972 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:40:39,973 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:40:39,974 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:40:39,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:40:39,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:40:39" (1/1) ... [2025-02-08 08:40:39,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab8a5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:39, skipping insertion in model container [2025-02-08 08:40:39,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:40:39" (1/1) ... [2025-02-08 08:40:39,997 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:40:40,163 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:40:40,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:40:40,181 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:40:40,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:40:40,225 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:40:40,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40 WrapperNode [2025-02-08 08:40:40,226 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:40:40,227 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:40:40,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:40:40,228 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:40:40,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,240 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,262 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 177 [2025-02-08 08:40:40,264 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:40:40,265 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:40:40,265 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:40:40,265 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:40:40,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,280 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,299 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-08 08:40:40,300 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,300 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,305 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,309 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:40:40,312 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:40:40,312 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:40:40,312 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:40:40,312 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (1/1) ... [2025-02-08 08:40:40,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:40:40,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:40,335 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) [2025-02-08 08:40:40,338 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 [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:40:40,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:40:40,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:40:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:40:40,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:40:40,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:40:40,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:40:40,356 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:40:40,428 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:40:40,430 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:40:40,754 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:40:40,755 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:40:40,965 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:40:40,965 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:40:40,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:40:40 BoogieIcfgContainer [2025-02-08 08:40:40,965 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:40:40,969 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:40:40,970 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:40:40,973 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:40:40,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:40:39" (1/3) ... [2025-02-08 08:40:40,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472106e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:40:40, skipping insertion in model container [2025-02-08 08:40:40,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:40" (2/3) ... [2025-02-08 08:40:40,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472106e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:40:40, skipping insertion in model container [2025-02-08 08:40:40,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:40:40" (3/3) ... [2025-02-08 08:40:40,976 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2025-02-08 08:40:40,989 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:40:40,990 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-dec-subseq.wvr.c that has 3 procedures, 49 locations, 1 initial locations, 4 loop locations, and 18 error locations. [2025-02-08 08:40:40,990 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:40:41,049 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 08:40:41,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 120 flow [2025-02-08 08:40:41,108 INFO L124 PetriNetUnfolderBase]: 5/51 cut-off events. [2025-02-08 08:40:41,110 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:40:41,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 5/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 134 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2025-02-08 08:40:41,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 53 transitions, 120 flow [2025-02-08 08:40:41,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 50 transitions, 112 flow [2025-02-08 08:40:41,127 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:40:41,139 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;@c6272f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:40:41,143 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2025-02-08 08:40:41,146 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:40:41,147 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:40:41,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:40:41,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:41,148 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:40:41,148 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:41,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:41,153 INFO L85 PathProgramCache]: Analyzing trace with hash 514821, now seen corresponding path program 1 times [2025-02-08 08:40:41,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:41,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566723534] [2025-02-08 08:40:41,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:41,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:41,217 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:40:41,240 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:40:41,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:41,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:41,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:41,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566723534] [2025-02-08 08:40:41,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566723534] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:41,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:41,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:40:41,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157605462] [2025-02-08 08:40:41,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:41,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:40:41,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:41,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:40:41,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:40:41,444 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-08 08:40:41,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:41,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:41,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-08 08:40:41,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:41,666 INFO L124 PetriNetUnfolderBase]: 285/545 cut-off events. [2025-02-08 08:40:41,667 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-08 08:40:41,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 545 events. 285/545 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2936 event pairs, 200 based on Foata normal form. 1/350 useless extension candidates. Maximal degree in co-relation 969. Up to 454 conditions per place. [2025-02-08 08:40:41,677 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 30 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2025-02-08 08:40:41,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 168 flow [2025-02-08 08:40:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:40:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:40:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2025-02-08 08:40:41,689 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2025-02-08 08:40:41,690 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 86 transitions. [2025-02-08 08:40:41,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 168 flow [2025-02-08 08:40:41,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 160 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:40:41,698 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 100 flow [2025-02-08 08:40:41,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2025-02-08 08:40:41,703 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2025-02-08 08:40:41,703 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 100 flow [2025-02-08 08:40:41,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:41,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:41,704 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:40:41,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:40:41,704 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:41,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 514822, now seen corresponding path program 1 times [2025-02-08 08:40:41,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:41,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611135839] [2025-02-08 08:40:41,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:41,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:40:41,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:40:41,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:41,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611135839] [2025-02-08 08:40:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611135839] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:42,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:42,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:42,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18872305] [2025-02-08 08:40:42,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:42,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:42,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:42,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:42,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:42,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-08 08:40:42,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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) [2025-02-08 08:40:42,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:42,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-08 08:40:42,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:42,259 INFO L124 PetriNetUnfolderBase]: 286/548 cut-off events. [2025-02-08 08:40:42,259 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:40:42,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 548 events. 286/548 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2947 event pairs, 200 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 999. Up to 463 conditions per place. [2025-02-08 08:40:42,263 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 33 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2025-02-08 08:40:42,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 180 flow [2025-02-08 08:40:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-02-08 08:40:42,265 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-08 08:40:42,265 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 100 flow. Second operand 4 states and 106 transitions. [2025-02-08 08:40:42,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 180 flow [2025-02-08 08:40:42,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:42,267 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 123 flow [2025-02-08 08:40:42,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2025-02-08 08:40:42,268 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2025-02-08 08:40:42,268 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 123 flow [2025-02-08 08:40:42,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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) [2025-02-08 08:40:42,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:42,268 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:40:42,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:40:42,269 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:42,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:42,269 INFO L85 PathProgramCache]: Analyzing trace with hash 15960407, now seen corresponding path program 1 times [2025-02-08 08:40:42,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:42,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910237365] [2025-02-08 08:40:42,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:42,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:42,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:40:42,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:40:42,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:42,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:42,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:42,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910237365] [2025-02-08 08:40:42,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910237365] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:42,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:42,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941404837] [2025-02-08 08:40:42,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:42,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:40:42,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:42,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:40:42,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:40:42,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-08 08:40:42,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 123 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) [2025-02-08 08:40:42,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:42,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-08 08:40:42,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:42,800 INFO L124 PetriNetUnfolderBase]: 287/551 cut-off events. [2025-02-08 08:40:42,800 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:40:42,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 551 events. 287/551 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2978 event pairs, 200 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 1020. Up to 462 conditions per place. [2025-02-08 08:40:42,807 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 33 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2025-02-08 08:40:42,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 209 flow [2025-02-08 08:40:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2025-02-08 08:40:42,811 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47547169811320755 [2025-02-08 08:40:42,811 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 123 flow. Second operand 5 states and 126 transitions. [2025-02-08 08:40:42,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 209 flow [2025-02-08 08:40:42,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:40:42,813 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 157 flow [2025-02-08 08:40:42,814 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2025-02-08 08:40:42,814 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2025-02-08 08:40:42,814 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 157 flow [2025-02-08 08:40:42,815 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) [2025-02-08 08:40:42,815 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:42,815 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:40:42,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:40:42,815 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:42,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 15960440, now seen corresponding path program 1 times [2025-02-08 08:40:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:42,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477281488] [2025-02-08 08:40:42,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:42,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:42,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:40:42,826 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:40:42,826 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:42,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:42,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:42,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477281488] [2025-02-08 08:40:42,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477281488] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:42,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:42,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14832882] [2025-02-08 08:40:42,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:42,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:42,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:42,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:42,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:42,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2025-02-08 08:40:42,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:42,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:42,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2025-02-08 08:40:42,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:43,019 INFO L124 PetriNetUnfolderBase]: 272/497 cut-off events. [2025-02-08 08:40:43,019 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-08 08:40:43,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 497 events. 272/497 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2412 event pairs, 200 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 960. Up to 439 conditions per place. [2025-02-08 08:40:43,023 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 35 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2025-02-08 08:40:43,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 225 flow [2025-02-08 08:40:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2025-02-08 08:40:43,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2025-02-08 08:40:43,026 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 157 flow. Second operand 4 states and 88 transitions. [2025-02-08 08:40:43,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 225 flow [2025-02-08 08:40:43,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:40:43,029 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 154 flow [2025-02-08 08:40:43,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2025-02-08 08:40:43,030 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2025-02-08 08:40:43,031 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 154 flow [2025-02-08 08:40:43,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:43,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:43,032 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:40:43,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:40:43,032 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:43,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:43,033 INFO L85 PathProgramCache]: Analyzing trace with hash 15960441, now seen corresponding path program 1 times [2025-02-08 08:40:43,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:43,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174121074] [2025-02-08 08:40:43,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:43,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:43,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:40:43,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:40:43,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:43,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:43,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:43,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174121074] [2025-02-08 08:40:43,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174121074] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:43,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:43,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848872157] [2025-02-08 08:40:43,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:43,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:40:43,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:43,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:40:43,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:40:43,100 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-08 08:40:43,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:43,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:43,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-08 08:40:43,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:43,202 INFO L124 PetriNetUnfolderBase]: 263/486 cut-off events. [2025-02-08 08:40:43,202 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-08 08:40:43,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 486 events. 263/486 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2436 event pairs, 179 based on Foata normal form. 1/339 useless extension candidates. Maximal degree in co-relation 923. Up to 423 conditions per place. [2025-02-08 08:40:43,206 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 33 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2025-02-08 08:40:43,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 219 flow [2025-02-08 08:40:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:40:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:40:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2025-02-08 08:40:43,207 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2025-02-08 08:40:43,207 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 154 flow. Second operand 3 states and 91 transitions. [2025-02-08 08:40:43,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 219 flow [2025-02-08 08:40:43,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:43,208 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 150 flow [2025-02-08 08:40:43,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2025-02-08 08:40:43,209 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2025-02-08 08:40:43,209 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 150 flow [2025-02-08 08:40:43,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:43,212 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:43,212 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:40:43,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:40:43,212 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:43,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:43,213 INFO L85 PathProgramCache]: Analyzing trace with hash 494760005, now seen corresponding path program 1 times [2025-02-08 08:40:43,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:43,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464133510] [2025-02-08 08:40:43,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:43,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:43,233 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:43,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:43,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:43,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:43,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:43,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464133510] [2025-02-08 08:40:43,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464133510] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326698544] [2025-02-08 08:40:43,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:43,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:43,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:43,441 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) [2025-02-08 08:40:43,443 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 [2025-02-08 08:40:43,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:43,505 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:43,505 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:43,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:43,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:40:43,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:43,586 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 [2025-02-08 08:40:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:43,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:43,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326698544] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:43,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:43,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:40:43,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053904257] [2025-02-08 08:40:43,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:43,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:40:43,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:43,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:40:43,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:40:43,911 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-08 08:40:43,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 150 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:43,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:43,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-08 08:40:43,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:44,177 INFO L124 PetriNetUnfolderBase]: 264/488 cut-off events. [2025-02-08 08:40:44,177 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-02-08 08:40:44,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 488 events. 264/488 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2446 event pairs, 179 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 925. Up to 423 conditions per place. [2025-02-08 08:40:44,180 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 30 selfloop transitions, 10 changer transitions 0/49 dead transitions. [2025-02-08 08:40:44,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 243 flow [2025-02-08 08:40:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:40:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:40:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2025-02-08 08:40:44,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2025-02-08 08:40:44,183 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 150 flow. Second operand 8 states and 176 transitions. [2025-02-08 08:40:44,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 243 flow [2025-02-08 08:40:44,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:40:44,185 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 179 flow [2025-02-08 08:40:44,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2025-02-08 08:40:44,187 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-02-08 08:40:44,188 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 179 flow [2025-02-08 08:40:44,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:44,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:44,188 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:40:44,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 08:40:44,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:44,393 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:44,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1841902562, now seen corresponding path program 1 times [2025-02-08 08:40:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:44,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198819073] [2025-02-08 08:40:44,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:44,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:44,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:44,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:44,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:44,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:44,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:44,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198819073] [2025-02-08 08:40:44,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198819073] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:44,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455200429] [2025-02-08 08:40:44,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:44,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:44,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:44,596 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) [2025-02-08 08:40:44,599 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 [2025-02-08 08:40:44,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:44,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:44,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:44,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:44,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:40:44,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:44,688 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 [2025-02-08 08:40:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:44,821 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:44,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455200429] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:44,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:44,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:40:44,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051213494] [2025-02-08 08:40:44,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:44,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:40:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:44,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:40:44,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:40:45,245 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-08 08:40:45,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 179 flow. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:45,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:45,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-08 08:40:45,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:45,552 INFO L124 PetriNetUnfolderBase]: 264/487 cut-off events. [2025-02-08 08:40:45,552 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-08 08:40:45,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 487 events. 264/487 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2435 event pairs, 179 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 923. Up to 414 conditions per place. [2025-02-08 08:40:45,556 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 25 selfloop transitions, 14 changer transitions 0/48 dead transitions. [2025-02-08 08:40:45,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 48 transitions, 253 flow [2025-02-08 08:40:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:40:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:40:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2025-02-08 08:40:45,557 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42048517520215634 [2025-02-08 08:40:45,557 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 179 flow. Second operand 7 states and 156 transitions. [2025-02-08 08:40:45,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 48 transitions, 253 flow [2025-02-08 08:40:45,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 207 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-08 08:40:45,559 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 157 flow [2025-02-08 08:40:45,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=157, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2025-02-08 08:40:45,560 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2025-02-08 08:40:45,560 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 157 flow [2025-02-08 08:40:45,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:45,560 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:45,560 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:40:45,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 08:40:45,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:45,765 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:45,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:45,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1841902528, now seen corresponding path program 1 times [2025-02-08 08:40:45,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:45,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279001752] [2025-02-08 08:40:45,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:45,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:45,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:45,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:45,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:45,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:45,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279001752] [2025-02-08 08:40:45,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279001752] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:45,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551448316] [2025-02-08 08:40:45,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:45,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:45,898 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) [2025-02-08 08:40:45,900 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 [2025-02-08 08:40:45,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:45,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:45,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:45,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:45,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:40:45,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:46,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:46,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-08 08:40:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551448316] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:46,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:46,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-08 08:40:46,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406011724] [2025-02-08 08:40:46,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:46,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:40:46,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:46,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:40:46,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:40:46,109 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2025-02-08 08:40:46,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 157 flow. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:46,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:46,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2025-02-08 08:40:46,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:46,278 INFO L124 PetriNetUnfolderBase]: 264/486 cut-off events. [2025-02-08 08:40:46,278 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-08 08:40:46,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 486 events. 264/486 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2440 event pairs, 179 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 903. Up to 414 conditions per place. [2025-02-08 08:40:46,281 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 33 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2025-02-08 08:40:46,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 47 transitions, 233 flow [2025-02-08 08:40:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2025-02-08 08:40:46,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2025-02-08 08:40:46,282 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 157 flow. Second operand 5 states and 127 transitions. [2025-02-08 08:40:46,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 47 transitions, 233 flow [2025-02-08 08:40:46,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 208 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-08 08:40:46,284 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 142 flow [2025-02-08 08:40:46,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2025-02-08 08:40:46,284 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2025-02-08 08:40:46,284 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 142 flow [2025-02-08 08:40:46,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:46,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:46,285 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:46,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 08:40:46,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:46,486 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:46,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash -965022040, now seen corresponding path program 1 times [2025-02-08 08:40:46,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:46,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131392171] [2025-02-08 08:40:46,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:46,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:46,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:40:46,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:40:46,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:46,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:46,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131392171] [2025-02-08 08:40:46,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131392171] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606155690] [2025-02-08 08:40:46,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:46,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:46,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:46,654 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) [2025-02-08 08:40:46,656 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 [2025-02-08 08:40:46,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:40:46,720 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:40:46,720 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:46,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:46,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:40:46,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:46,764 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:40:46,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606155690] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:46,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:40:46,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2025-02-08 08:40:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709614460] [2025-02-08 08:40:46,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:46,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:46,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:46,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:46,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-02-08 08:40:46,786 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2025-02-08 08:40:46,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:46,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:46,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2025-02-08 08:40:46,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:46,929 INFO L124 PetriNetUnfolderBase]: 488/848 cut-off events. [2025-02-08 08:40:46,929 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:40:46,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1717 conditions, 848 events. 488/848 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4347 event pairs, 159 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 1660. Up to 478 conditions per place. [2025-02-08 08:40:46,934 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 61 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2025-02-08 08:40:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 69 transitions, 317 flow [2025-02-08 08:40:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2025-02-08 08:40:46,936 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5613207547169812 [2025-02-08 08:40:46,936 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 142 flow. Second operand 4 states and 119 transitions. [2025-02-08 08:40:46,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 69 transitions, 317 flow [2025-02-08 08:40:46,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:40:46,939 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 149 flow [2025-02-08 08:40:46,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2025-02-08 08:40:46,939 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2025-02-08 08:40:46,940 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 149 flow [2025-02-08 08:40:46,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:46,940 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:46,940 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:46,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:40:47,140 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 [2025-02-08 08:40:47,140 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:47,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:47,141 INFO L85 PathProgramCache]: Analyzing trace with hash 326769641, now seen corresponding path program 1 times [2025-02-08 08:40:47,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:47,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830373254] [2025-02-08 08:40:47,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:47,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:47,147 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:40:47,153 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:40:47,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:47,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:47,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:47,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830373254] [2025-02-08 08:40:47,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830373254] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:47,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:47,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:47,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784850639] [2025-02-08 08:40:47,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:47,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:47,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:47,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:47,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:47,211 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-08 08:40:47,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:47,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:47,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-08 08:40:47,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:47,377 INFO L124 PetriNetUnfolderBase]: 473/915 cut-off events. [2025-02-08 08:40:47,377 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-08 08:40:47,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 915 events. 473/915 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5364 event pairs, 381 based on Foata normal form. 37/754 useless extension candidates. Maximal degree in co-relation 1468. Up to 664 conditions per place. [2025-02-08 08:40:47,384 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 55 selfloop transitions, 4 changer transitions 1/68 dead transitions. [2025-02-08 08:40:47,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 334 flow [2025-02-08 08:40:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2025-02-08 08:40:47,385 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2025-02-08 08:40:47,386 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 149 flow. Second operand 5 states and 155 transitions. [2025-02-08 08:40:47,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 334 flow [2025-02-08 08:40:47,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:47,387 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 177 flow [2025-02-08 08:40:47,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2025-02-08 08:40:47,391 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-02-08 08:40:47,391 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 177 flow [2025-02-08 08:40:47,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:47,391 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:47,391 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:47,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 08:40:47,391 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:47,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash 646905226, now seen corresponding path program 1 times [2025-02-08 08:40:47,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:47,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945011054] [2025-02-08 08:40:47,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:47,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:47,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:40:47,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:40:47,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:47,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:47,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:47,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945011054] [2025-02-08 08:40:47,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945011054] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:47,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365628347] [2025-02-08 08:40:47,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:47,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:47,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:47,619 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) [2025-02-08 08:40:47,621 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 [2025-02-08 08:40:47,667 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:40:47,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:40:47,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:47,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:47,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-08 08:40:47,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:47,704 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 [2025-02-08 08:40:47,770 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:40:47,771 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 18 treesize of output 17 [2025-02-08 08:40:47,785 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:40:47,786 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 [2025-02-08 08:40:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:47,856 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:40:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365628347] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:47,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:40:47,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 7 [2025-02-08 08:40:47,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235559761] [2025-02-08 08:40:47,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:47,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:40:47,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:47,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:40:47,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:40:47,915 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-08 08:40:47,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:47,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:47,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-08 08:40:47,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:48,062 INFO L124 PetriNetUnfolderBase]: 382/758 cut-off events. [2025-02-08 08:40:48,063 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2025-02-08 08:40:48,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 758 events. 382/758 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4259 event pairs, 300 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 1298. Up to 654 conditions per place. [2025-02-08 08:40:48,067 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 34 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2025-02-08 08:40:48,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 247 flow [2025-02-08 08:40:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2025-02-08 08:40:48,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4377358490566038 [2025-02-08 08:40:48,069 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 177 flow. Second operand 5 states and 116 transitions. [2025-02-08 08:40:48,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 247 flow [2025-02-08 08:40:48,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:48,071 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 174 flow [2025-02-08 08:40:48,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2025-02-08 08:40:48,072 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-02-08 08:40:48,072 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 174 flow [2025-02-08 08:40:48,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:48,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:48,073 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:48,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 08:40:48,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-08 08:40:48,277 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:48,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash 646905225, now seen corresponding path program 1 times [2025-02-08 08:40:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:48,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116860660] [2025-02-08 08:40:48,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:48,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:40:48,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:40:48,294 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:48,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:40:48,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116860660] [2025-02-08 08:40:48,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116860660] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:48,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:48,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:40:48,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098336187] [2025-02-08 08:40:48,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:48,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:40:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:48,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:40:48,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:40:48,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2025-02-08 08:40:48,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 174 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:48,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:48,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2025-02-08 08:40:48,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:48,621 INFO L124 PetriNetUnfolderBase]: 355/691 cut-off events. [2025-02-08 08:40:48,622 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-02-08 08:40:48,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 691 events. 355/691 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3489 event pairs, 279 based on Foata normal form. 0/638 useless extension candidates. Maximal degree in co-relation 1035. Up to 615 conditions per place. [2025-02-08 08:40:48,626 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 33 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2025-02-08 08:40:48,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 45 transitions, 242 flow [2025-02-08 08:40:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2025-02-08 08:40:48,627 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2025-02-08 08:40:48,627 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 174 flow. Second operand 5 states and 110 transitions. [2025-02-08 08:40:48,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 45 transitions, 242 flow [2025-02-08 08:40:48,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 233 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:40:48,629 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 167 flow [2025-02-08 08:40:48,630 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2025-02-08 08:40:48,630 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2025-02-08 08:40:48,630 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 167 flow [2025-02-08 08:40:48,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:48,630 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:48,630 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:48,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 08:40:48,630 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:48,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash 493061936, now seen corresponding path program 1 times [2025-02-08 08:40:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:48,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984856313] [2025-02-08 08:40:48,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:48,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:48,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:40:48,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:40:48,644 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:48,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:48,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:48,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984856313] [2025-02-08 08:40:48,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984856313] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:48,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309040449] [2025-02-08 08:40:48,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:48,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:48,729 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) [2025-02-08 08:40:48,732 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 [2025-02-08 08:40:48,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:40:48,794 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:40:48,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:48,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:48,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:40:48,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:48,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:48,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309040449] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:48,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-02-08 08:40:48,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070736492] [2025-02-08 08:40:48,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:48,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:40:48,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:48,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:40:48,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:40:49,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2025-02-08 08:40:49,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 167 flow. Second operand has 15 states, 15 states have (on average 20.066666666666666) internal successors, (301), 15 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:49,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:49,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2025-02-08 08:40:49,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:49,364 INFO L124 PetriNetUnfolderBase]: 549/1077 cut-off events. [2025-02-08 08:40:49,365 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2025-02-08 08:40:49,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2353 conditions, 1077 events. 549/1077 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5996 event pairs, 186 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 1584. Up to 274 conditions per place. [2025-02-08 08:40:49,371 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 82 selfloop transitions, 21 changer transitions 0/110 dead transitions. [2025-02-08 08:40:49,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 110 transitions, 542 flow [2025-02-08 08:40:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:40:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 08:40:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 295 transitions. [2025-02-08 08:40:49,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5060034305317325 [2025-02-08 08:40:49,373 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 167 flow. Second operand 11 states and 295 transitions. [2025-02-08 08:40:49,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 110 transitions, 542 flow [2025-02-08 08:40:49,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 110 transitions, 532 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:40:49,375 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 254 flow [2025-02-08 08:40:49,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2025-02-08 08:40:49,376 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2025-02-08 08:40:49,376 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 254 flow [2025-02-08 08:40:49,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.066666666666666) internal successors, (301), 15 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:49,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:49,376 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:49,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 08:40:49,577 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 [2025-02-08 08:40:49,577 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:49,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash -356303561, now seen corresponding path program 2 times [2025-02-08 08:40:49,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:49,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83884575] [2025-02-08 08:40:49,578 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:40:49,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:49,587 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-08 08:40:49,605 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:40:49,605 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:40:49,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:49,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:49,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83884575] [2025-02-08 08:40:49,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83884575] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:49,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599251555] [2025-02-08 08:40:49,803 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:40:49,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:49,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:49,806 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) [2025-02-08 08:40:49,808 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 [2025-02-08 08:40:49,854 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-08 08:40:49,874 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:40:49,874 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:40:49,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:49,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 08:40:49,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:49,886 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 [2025-02-08 08:40:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:50,021 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:50,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599251555] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:50,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:50,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-02-08 08:40:50,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151063182] [2025-02-08 08:40:50,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:50,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-08 08:40:50,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:50,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-08 08:40:50,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2025-02-08 08:40:50,503 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2025-02-08 08:40:50,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 254 flow. Second operand has 19 states, 19 states have (on average 15.0) internal successors, (285), 19 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:50,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:50,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2025-02-08 08:40:50,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:51,067 INFO L124 PetriNetUnfolderBase]: 737/1413 cut-off events. [2025-02-08 08:40:51,068 INFO L125 PetriNetUnfolderBase]: For 295/295 co-relation queries the response was YES. [2025-02-08 08:40:51,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3326 conditions, 1413 events. 737/1413 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7877 event pairs, 246 based on Foata normal form. 68/1381 useless extension candidates. Maximal degree in co-relation 2178. Up to 290 conditions per place. [2025-02-08 08:40:51,077 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 89 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2025-02-08 08:40:51,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 605 flow [2025-02-08 08:40:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:40:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:40:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2025-02-08 08:40:51,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2025-02-08 08:40:51,079 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 254 flow. Second operand 10 states and 238 transitions. [2025-02-08 08:40:51,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 605 flow [2025-02-08 08:40:51,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 599 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:51,082 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 295 flow [2025-02-08 08:40:51,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=295, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2025-02-08 08:40:51,083 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2025-02-08 08:40:51,083 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 295 flow [2025-02-08 08:40:51,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.0) internal successors, (285), 19 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:51,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:51,083 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:51,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 08:40:51,284 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 [2025-02-08 08:40:51,284 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:51,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1906047158, now seen corresponding path program 1 times [2025-02-08 08:40:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:51,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663063907] [2025-02-08 08:40:51,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:51,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:51,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:40:51,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:40:51,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:51,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:51,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:51,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663063907] [2025-02-08 08:40:51,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663063907] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:51,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:51,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:51,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995582250] [2025-02-08 08:40:51,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:51,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:51,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:51,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:51,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:51,345 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2025-02-08 08:40:51,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:51,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:51,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2025-02-08 08:40:51,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:51,507 INFO L124 PetriNetUnfolderBase]: 645/1261 cut-off events. [2025-02-08 08:40:51,508 INFO L125 PetriNetUnfolderBase]: For 785/785 co-relation queries the response was YES. [2025-02-08 08:40:51,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3163 conditions, 1261 events. 645/1261 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6973 event pairs, 186 based on Foata normal form. 40/1193 useless extension candidates. Maximal degree in co-relation 2061. Up to 712 conditions per place. [2025-02-08 08:40:51,516 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 52 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2025-02-08 08:40:51,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 433 flow [2025-02-08 08:40:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-02-08 08:40:51,518 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2025-02-08 08:40:51,518 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 295 flow. Second operand 4 states and 114 transitions. [2025-02-08 08:40:51,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 433 flow [2025-02-08 08:40:51,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 64 transitions, 408 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-02-08 08:40:51,521 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 271 flow [2025-02-08 08:40:51,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2025-02-08 08:40:51,522 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 20 predicate places. [2025-02-08 08:40:51,522 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 271 flow [2025-02-08 08:40:51,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:51,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:51,522 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:51,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-08 08:40:51,523 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:51,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash 817100351, now seen corresponding path program 3 times [2025-02-08 08:40:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:51,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536716543] [2025-02-08 08:40:51,523 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:40:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:51,530 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-02-08 08:40:51,540 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 20 statements. [2025-02-08 08:40:51,540 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:40:51,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-08 08:40:51,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536716543] [2025-02-08 08:40:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536716543] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878245042] [2025-02-08 08:40:51,697 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:40:51,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:51,699 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) [2025-02-08 08:40:51,702 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 [2025-02-08 08:40:51,747 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-02-08 08:40:51,765 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 20 statements. [2025-02-08 08:40:51,765 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:40:51,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:51,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:40:51,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-08 08:40:51,830 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:51,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2025-02-08 08:40:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-08 08:40:52,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878245042] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:52,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:52,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-08 08:40:52,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401694426] [2025-02-08 08:40:52,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:52,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:40:52,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:52,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:40:52,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:40:52,251 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2025-02-08 08:40:52,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 271 flow. Second operand has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:52,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:52,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2025-02-08 08:40:52,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:52,582 INFO L124 PetriNetUnfolderBase]: 749/1365 cut-off events. [2025-02-08 08:40:52,582 INFO L125 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2025-02-08 08:40:52,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 1365 events. 749/1365 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7098 event pairs, 60 based on Foata normal form. 20/1292 useless extension candidates. Maximal degree in co-relation 2255. Up to 450 conditions per place. [2025-02-08 08:40:52,591 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 59 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2025-02-08 08:40:52,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 492 flow [2025-02-08 08:40:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:40:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:40:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2025-02-08 08:40:52,595 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42452830188679247 [2025-02-08 08:40:52,595 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 271 flow. Second operand 8 states and 180 transitions. [2025-02-08 08:40:52,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 492 flow [2025-02-08 08:40:52,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 476 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:40:52,599 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 303 flow [2025-02-08 08:40:52,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2025-02-08 08:40:52,600 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2025-02-08 08:40:52,601 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 303 flow [2025-02-08 08:40:52,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:52,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:52,602 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] [2025-02-08 08:40:52,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 08:40:52,802 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 [2025-02-08 08:40:52,803 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:52,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:52,803 INFO L85 PathProgramCache]: Analyzing trace with hash -883002514, now seen corresponding path program 1 times [2025-02-08 08:40:52,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:52,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343010785] [2025-02-08 08:40:52,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:52,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:52,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:40:52,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:40:52,821 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:52,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:52,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:52,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343010785] [2025-02-08 08:40:52,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343010785] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:52,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:52,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:52,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831313670] [2025-02-08 08:40:52,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:52,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:40:52,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:52,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:40:52,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:40:52,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-08 08:40:52,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 303 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) [2025-02-08 08:40:52,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:52,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-08 08:40:52,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:53,018 INFO L124 PetriNetUnfolderBase]: 748/1461 cut-off events. [2025-02-08 08:40:53,018 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2025-02-08 08:40:53,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3645 conditions, 1461 events. 748/1461 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8545 event pairs, 367 based on Foata normal form. 6/1335 useless extension candidates. Maximal degree in co-relation 2677. Up to 810 conditions per place. [2025-02-08 08:40:53,025 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 53 selfloop transitions, 2 changer transitions 4/68 dead transitions. [2025-02-08 08:40:53,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 493 flow [2025-02-08 08:40:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:40:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:40:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-02-08 08:40:53,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2025-02-08 08:40:53,027 INFO L175 Difference]: Start difference. First operand has 75 places, 52 transitions, 303 flow. Second operand 3 states and 96 transitions. [2025-02-08 08:40:53,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 493 flow [2025-02-08 08:40:53,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 463 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-08 08:40:53,031 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 270 flow [2025-02-08 08:40:53,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2025-02-08 08:40:53,032 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2025-02-08 08:40:53,032 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 270 flow [2025-02-08 08:40:53,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) [2025-02-08 08:40:53,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:53,033 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] [2025-02-08 08:40:53,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-08 08:40:53,033 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:53,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:53,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794046, now seen corresponding path program 1 times [2025-02-08 08:40:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:53,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317270004] [2025-02-08 08:40:53,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:53,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:53,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 08:40:53,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 08:40:53,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:53,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:40:53,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:53,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317270004] [2025-02-08 08:40:53,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317270004] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:53,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:53,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:53,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550029258] [2025-02-08 08:40:53,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:53,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:40:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:53,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:40:53,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:40:53,088 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-08 08:40:53,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:53,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:53,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-08 08:40:53,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:53,217 INFO L124 PetriNetUnfolderBase]: 637/1242 cut-off events. [2025-02-08 08:40:53,218 INFO L125 PetriNetUnfolderBase]: For 1152/1158 co-relation queries the response was YES. [2025-02-08 08:40:53,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3255 conditions, 1242 events. 637/1242 cut-off events. For 1152/1158 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6674 event pairs, 271 based on Foata normal form. 28/1187 useless extension candidates. Maximal degree in co-relation 3191. Up to 812 conditions per place. [2025-02-08 08:40:53,226 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 50 selfloop transitions, 2 changer transitions 6/67 dead transitions. [2025-02-08 08:40:53,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 67 transitions, 455 flow [2025-02-08 08:40:53,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:40:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:40:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-02-08 08:40:53,228 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2025-02-08 08:40:53,228 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 270 flow. Second operand 3 states and 96 transitions. [2025-02-08 08:40:53,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 67 transitions, 455 flow [2025-02-08 08:40:53,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 451 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:53,231 INFO L231 Difference]: Finished difference. Result has 73 places, 52 transitions, 280 flow [2025-02-08 08:40:53,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=73, PETRI_TRANSITIONS=52} [2025-02-08 08:40:53,233 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2025-02-08 08:40:53,233 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 52 transitions, 280 flow [2025-02-08 08:40:53,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:53,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:53,233 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] [2025-02-08 08:40:53,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-08 08:40:53,234 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:40:53,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:53,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1293123125, now seen corresponding path program 1 times [2025-02-08 08:40:53,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:53,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560490300] [2025-02-08 08:40:53,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:53,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:53,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-08 08:40:53,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:40:53,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:53,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:53,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:53,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560490300] [2025-02-08 08:40:53,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560490300] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:53,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673179181] [2025-02-08 08:40:53,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:53,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:53,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:53,843 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) [2025-02-08 08:40:53,845 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 [2025-02-08 08:40:53,897 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-08 08:40:53,925 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:40:53,925 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:53,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:53,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-08 08:40:53,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:53,945 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 [2025-02-08 08:40:53,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-02-08 08:40:54,036 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:40:54,037 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 [2025-02-08 08:40:54,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2025-02-08 08:40:54,546 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2025-02-08 08:40:54,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2025-02-08 08:40:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:54,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:55,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:40:55,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2025-02-08 08:40:55,997 INFO L349 Elim1Store]: treesize reduction 9, result has 80.9 percent of original size [2025-02-08 08:40:55,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 181 [2025-02-08 08:40:56,013 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-08 08:40:56,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:40:56,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 120 [2025-02-08 08:40:56,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:40:56,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2025-02-08 08:40:56,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:40:56,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2025-02-08 08:40:56,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:40:56,334 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 70 treesize of output 63 [2025-02-08 08:40:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:56,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673179181] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:56,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:56,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 35 [2025-02-08 08:40:56,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911995370] [2025-02-08 08:40:56,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:56,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-08 08:40:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:56,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-08 08:40:56,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=995, Unknown=4, NotChecked=0, Total=1260 [2025-02-08 08:41:01,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:41:01,190 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 53 [2025-02-08 08:41:01,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 52 transitions, 280 flow. Second operand has 36 states, 36 states have (on average 7.305555555555555) internal successors, (263), 36 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:01,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:01,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 53 [2025-02-08 08:41:01,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:05,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:41:13,824 INFO L124 PetriNetUnfolderBase]: 2796/4972 cut-off events. [2025-02-08 08:41:13,824 INFO L125 PetriNetUnfolderBase]: For 4855/4855 co-relation queries the response was YES. [2025-02-08 08:41:13,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13846 conditions, 4972 events. 2796/4972 cut-off events. For 4855/4855 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 29796 event pairs, 541 based on Foata normal form. 11/4425 useless extension candidates. Maximal degree in co-relation 8160. Up to 1044 conditions per place. [2025-02-08 08:41:13,851 INFO L140 encePairwiseOnDemand]: 30/53 looper letters, 249 selfloop transitions, 162 changer transitions 101/515 dead transitions. [2025-02-08 08:41:13,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 515 transitions, 3296 flow [2025-02-08 08:41:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2025-02-08 08:41:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2025-02-08 08:41:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 752 transitions. [2025-02-08 08:41:13,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.21828737300435413 [2025-02-08 08:41:13,857 INFO L175 Difference]: Start difference. First operand has 73 places, 52 transitions, 280 flow. Second operand 65 states and 752 transitions. [2025-02-08 08:41:13,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 515 transitions, 3296 flow [2025-02-08 08:41:13,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 515 transitions, 3205 flow, removed 43 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:13,877 INFO L231 Difference]: Finished difference. Result has 174 places, 223 transitions, 1968 flow [2025-02-08 08:41:13,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=1968, PETRI_PLACES=174, PETRI_TRANSITIONS=223} [2025-02-08 08:41:13,879 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2025-02-08 08:41:13,879 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 223 transitions, 1968 flow [2025-02-08 08:41:13,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.305555555555555) internal successors, (263), 36 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:13,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:13,879 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:13,888 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 [2025-02-08 08:41:14,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:14,080 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:41:14,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:14,081 INFO L85 PathProgramCache]: Analyzing trace with hash 367835952, now seen corresponding path program 2 times [2025-02-08 08:41:14,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:14,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708969791] [2025-02-08 08:41:14,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:14,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:14,088 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-02-08 08:41:14,109 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 08:41:14,110 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:14,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-08 08:41:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:14,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708969791] [2025-02-08 08:41:14,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708969791] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:14,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:14,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-08 08:41:14,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521371225] [2025-02-08 08:41:14,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:14,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 08:41:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:14,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 08:41:14,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:41:14,669 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2025-02-08 08:41:14,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 223 transitions, 1968 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:14,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:14,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2025-02-08 08:41:14,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:15,464 INFO L124 PetriNetUnfolderBase]: 2082/3926 cut-off events. [2025-02-08 08:41:15,464 INFO L125 PetriNetUnfolderBase]: For 23301/23401 co-relation queries the response was YES. [2025-02-08 08:41:15,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19119 conditions, 3926 events. 2082/3926 cut-off events. For 23301/23401 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 22410 event pairs, 154 based on Foata normal form. 14/3804 useless extension candidates. Maximal degree in co-relation 16078. Up to 1131 conditions per place. [2025-02-08 08:41:15,495 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 276 selfloop transitions, 46 changer transitions 11/347 dead transitions. [2025-02-08 08:41:15,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 347 transitions, 3772 flow [2025-02-08 08:41:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:41:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:41:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2025-02-08 08:41:15,497 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2025-02-08 08:41:15,497 INFO L175 Difference]: Start difference. First operand has 174 places, 223 transitions, 1968 flow. Second operand 9 states and 243 transitions. [2025-02-08 08:41:15,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 347 transitions, 3772 flow [2025-02-08 08:41:15,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 347 transitions, 3438 flow, removed 156 selfloop flow, removed 11 redundant places. [2025-02-08 08:41:15,610 INFO L231 Difference]: Finished difference. Result has 165 places, 247 transitions, 2161 flow [2025-02-08 08:41:15,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2161, PETRI_PLACES=165, PETRI_TRANSITIONS=247} [2025-02-08 08:41:15,610 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 113 predicate places. [2025-02-08 08:41:15,611 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 247 transitions, 2161 flow [2025-02-08 08:41:15,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:15,611 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2025-02-08 08:41:15,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-08 08:41:15,611 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:41:15,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:15,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1300261316, now seen corresponding path program 3 times [2025-02-08 08:41:15,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:15,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606227592] [2025-02-08 08:41:15,613 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:15,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:15,620 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 3 equivalence classes. [2025-02-08 08:41:15,632 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 34 of 35 statements. [2025-02-08 08:41:15,633 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:15,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:15,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:15,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606227592] [2025-02-08 08:41:15,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606227592] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:15,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883456538] [2025-02-08 08:41:15,745 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:15,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:15,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:15,749 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) [2025-02-08 08:41:15,750 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 [2025-02-08 08:41:15,809 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 3 equivalence classes. [2025-02-08 08:41:15,839 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 34 of 35 statements. [2025-02-08 08:41:15,839 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:15,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:41:15,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:16,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:16,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883456538] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:16,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:16,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2025-02-08 08:41:16,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064881156] [2025-02-08 08:41:16,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:16,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:41:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:16,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:41:16,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:41:16,593 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-08 08:41:16,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 247 transitions, 2161 flow. Second operand has 16 states, 16 states have (on average 23.625) internal successors, (378), 16 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:16,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:16,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-08 08:41:16,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:17,341 INFO L124 PetriNetUnfolderBase]: 1422/2934 cut-off events. [2025-02-08 08:41:17,341 INFO L125 PetriNetUnfolderBase]: For 14322/14400 co-relation queries the response was YES. [2025-02-08 08:41:17,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13426 conditions, 2934 events. 1422/2934 cut-off events. For 14322/14400 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 19156 event pairs, 634 based on Foata normal form. 135/2970 useless extension candidates. Maximal degree in co-relation 11126. Up to 1366 conditions per place. [2025-02-08 08:41:17,360 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 46 selfloop transitions, 11 changer transitions 160/228 dead transitions. [2025-02-08 08:41:17,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 228 transitions, 2392 flow [2025-02-08 08:41:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2025-02-08 08:41:17,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5075471698113208 [2025-02-08 08:41:17,362 INFO L175 Difference]: Start difference. First operand has 165 places, 247 transitions, 2161 flow. Second operand 10 states and 269 transitions. [2025-02-08 08:41:17,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 228 transitions, 2392 flow [2025-02-08 08:41:17,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 228 transitions, 2310 flow, removed 27 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:17,433 INFO L231 Difference]: Finished difference. Result has 164 places, 68 transitions, 603 flow [2025-02-08 08:41:17,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=603, PETRI_PLACES=164, PETRI_TRANSITIONS=68} [2025-02-08 08:41:17,434 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 112 predicate places. [2025-02-08 08:41:17,434 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 68 transitions, 603 flow [2025-02-08 08:41:17,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 23.625) internal successors, (378), 16 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:17,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:17,435 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:17,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-08 08:41:17,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:17,636 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:41:17,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:17,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1350221863, now seen corresponding path program 4 times [2025-02-08 08:41:17,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:17,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412381500] [2025-02-08 08:41:17,638 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:17,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:17,647 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-02-08 08:41:17,657 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-08 08:41:17,658 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:41:17,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-08 08:41:17,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:17,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412381500] [2025-02-08 08:41:17,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412381500] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:17,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:17,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:41:17,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246030329] [2025-02-08 08:41:17,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:17,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:17,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:17,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:17,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:17,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-08 08:41:17,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 68 transitions, 603 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:17,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:17,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-08 08:41:17,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:18,131 INFO L124 PetriNetUnfolderBase]: 1051/2114 cut-off events. [2025-02-08 08:41:18,132 INFO L125 PetriNetUnfolderBase]: For 10408/10484 co-relation queries the response was YES. [2025-02-08 08:41:18,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9639 conditions, 2114 events. 1051/2114 cut-off events. For 10408/10484 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11807 event pairs, 345 based on Foata normal form. 58/2052 useless extension candidates. Maximal degree in co-relation 8677. Up to 791 conditions per place. [2025-02-08 08:41:18,154 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 92 selfloop transitions, 11 changer transitions 10/124 dead transitions. [2025-02-08 08:41:18,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 1228 flow [2025-02-08 08:41:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2025-02-08 08:41:18,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2025-02-08 08:41:18,155 INFO L175 Difference]: Start difference. First operand has 164 places, 68 transitions, 603 flow. Second operand 4 states and 136 transitions. [2025-02-08 08:41:18,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 1228 flow [2025-02-08 08:41:18,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 994 flow, removed 87 selfloop flow, removed 36 redundant places. [2025-02-08 08:41:18,184 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 485 flow [2025-02-08 08:41:18,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=485, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2025-02-08 08:41:18,185 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2025-02-08 08:41:18,185 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 485 flow [2025-02-08 08:41:18,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:18,185 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:18,185 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:18,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-08 08:41:18,185 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-08 08:41:18,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:18,186 INFO L85 PathProgramCache]: Analyzing trace with hash -515512227, now seen corresponding path program 5 times [2025-02-08 08:41:18,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:18,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480007465] [2025-02-08 08:41:18,186 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:18,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:18,195 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 4 equivalence classes. [2025-02-08 08:41:18,232 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 45 of 45 statements. [2025-02-08 08:41:18,232 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-08 08:41:18,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:19,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:19,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480007465] [2025-02-08 08:41:19,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480007465] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:19,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671102812] [2025-02-08 08:41:19,695 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:19,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:19,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:19,698 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) [2025-02-08 08:41:19,700 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 [2025-02-08 08:41:19,758 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 4 equivalence classes. [2025-02-08 08:41:19,796 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 45 of 45 statements. [2025-02-08 08:41:19,796 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-08 08:41:19,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:19,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-02-08 08:41:19,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:21,244 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-08 08:41:21,257 INFO L349 Elim1Store]: treesize reduction 47, result has 14.5 percent of original size [2025-02-08 08:41:21,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 24 [2025-02-08 08:41:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:21,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:25,290 INFO L349 Elim1Store]: treesize reduction 144, result has 87.7 percent of original size [2025-02-08 08:41:25,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 233 treesize of output 1086