./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series.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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:08:19,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:08:19,040 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:08:19,043 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:08:19,044 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:08:19,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:08:19,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:08:19,058 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:08:19,058 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:08:19,058 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:08:19,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:08:19,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:08:19,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:08:19,058 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:08:19,058 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:08:19,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:08:19,059 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:08:19,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:08:19,060 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:08:19,060 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:08:19,060 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:08:19,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:08:19,060 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:08:19,060 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:08:19,060 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:08:19,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:08:19,060 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 -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2025-02-06 13:08:19,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:08:19,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:08:19,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:08:19,299 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:08:19,299 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:08:19,300 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2025-02-06 13:08:20,633 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4604370ce/b6b5a52acd36450fb14f62ab2b6a25c8/FLAG1986b6e69 [2025-02-06 13:08:20,888 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:08:20,889 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2025-02-06 13:08:20,897 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4604370ce/b6b5a52acd36450fb14f62ab2b6a25c8/FLAG1986b6e69 [2025-02-06 13:08:21,228 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4604370ce/b6b5a52acd36450fb14f62ab2b6a25c8 [2025-02-06 13:08:21,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:08:21,232 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:08:21,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:08:21,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:08:21,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:08:21,239 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,240 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d0f537d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21, skipping insertion in model container [2025-02-06 13:08:21,240 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,253 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:08:21,421 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:08:21,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:08:21,441 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:08:21,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:08:21,496 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:08:21,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21 WrapperNode [2025-02-06 13:08:21,498 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:08:21,499 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:08:21,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:08:21,500 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:08:21,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,520 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,543 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 321 [2025-02-06 13:08:21,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:08:21,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:08:21,545 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:08:21,545 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:08:21,550 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,553 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,563 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-06 13:08:21,563 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,573 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,574 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,585 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:08:21,585 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:08:21,586 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:08:21,586 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:08:21,586 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (1/1) ... [2025-02-06 13:08:21,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:08:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:21,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:08:21,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:08:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:08:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:08:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:08:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:08:21,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-06 13:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:08:21,635 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:08:21,736 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:08:21,738 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:08:22,208 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:08:22,209 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:08:22,535 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:08:22,535 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:08:22,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:08:22 BoogieIcfgContainer [2025-02-06 13:08:22,536 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:08:22,537 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:08:22,537 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:08:22,541 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:08:22,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:08:21" (1/3) ... [2025-02-06 13:08:22,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f3e368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:08:22, skipping insertion in model container [2025-02-06 13:08:22,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:21" (2/3) ... [2025-02-06 13:08:22,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f3e368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:08:22, skipping insertion in model container [2025-02-06 13:08:22,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:08:22" (3/3) ... [2025-02-06 13:08:22,543 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2025-02-06 13:08:22,563 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:08:22,564 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series.wvr.c that has 5 procedures, 71 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2025-02-06 13:08:22,564 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:08:22,632 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-06 13:08:22,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 77 transitions, 182 flow [2025-02-06 13:08:22,705 INFO L124 PetriNetUnfolderBase]: 7/73 cut-off events. [2025-02-06 13:08:22,709 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:08:22,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 73 events. 7/73 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 183 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2025-02-06 13:08:22,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 77 transitions, 182 flow [2025-02-06 13:08:22,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 168 flow [2025-02-06 13:08:22,728 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:08:22,737 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;@52018957, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:08:22,741 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2025-02-06 13:08:22,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:08:22,744 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:08:22,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:08:22,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:22,744 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:08:22,744 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:22,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash 929051, now seen corresponding path program 1 times [2025-02-06 13:08:22,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:22,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376302377] [2025-02-06 13:08:22,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:22,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:22,854 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:08:22,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:08:22,876 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:22,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:23,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:23,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376302377] [2025-02-06 13:08:23,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376302377] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:23,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:23,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:08:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486867678] [2025-02-06 13:08:23,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:23,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:23,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:23,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:23,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:23,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-02-06 13:08:23,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 168 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) [2025-02-06 13:08:23,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:23,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-02-06 13:08:23,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:25,830 INFO L124 PetriNetUnfolderBase]: 24724/32935 cut-off events. [2025-02-06 13:08:25,830 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2025-02-06 13:08:25,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66545 conditions, 32935 events. 24724/32935 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 205782 event pairs, 20908 based on Foata normal form. 1/21514 useless extension candidates. Maximal degree in co-relation 63308. Up to 32075 conditions per place. [2025-02-06 13:08:26,035 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 51 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2025-02-06 13:08:26,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 260 flow [2025-02-06 13:08:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2025-02-06 13:08:26,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2025-02-06 13:08:26,046 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 168 flow. Second operand 3 states and 110 transitions. [2025-02-06 13:08:26,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 260 flow [2025-02-06 13:08:26,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 244 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 13:08:26,193 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 142 flow [2025-02-06 13:08:26,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2025-02-06 13:08:26,197 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2025-02-06 13:08:26,197 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 142 flow [2025-02-06 13:08:26,197 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) [2025-02-06 13:08:26,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:26,197 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:08:26,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:08:26,197 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:26,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:26,198 INFO L85 PathProgramCache]: Analyzing trace with hash 929052, now seen corresponding path program 1 times [2025-02-06 13:08:26,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:26,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560513699] [2025-02-06 13:08:26,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:26,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:26,207 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:08:26,234 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:08:26,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:26,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:26,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:26,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560513699] [2025-02-06 13:08:26,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560513699] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:26,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:26,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:26,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711243679] [2025-02-06 13:08:26,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:26,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:26,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:26,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:26,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:26,497 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-02-06 13:08:26,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 142 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) [2025-02-06 13:08:26,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:26,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-02-06 13:08:26,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:28,709 INFO L124 PetriNetUnfolderBase]: 24724/32934 cut-off events. [2025-02-06 13:08:28,710 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-02-06 13:08:28,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65601 conditions, 32934 events. 24724/32934 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 205792 event pairs, 20908 based on Foata normal form. 0/21511 useless extension candidates. Maximal degree in co-relation 65572. Up to 32083 conditions per place. [2025-02-06 13:08:28,877 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 51 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2025-02-06 13:08:28,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 250 flow [2025-02-06 13:08:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2025-02-06 13:08:28,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2025-02-06 13:08:28,883 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 142 flow. Second operand 4 states and 124 transitions. [2025-02-06 13:08:28,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 250 flow [2025-02-06 13:08:28,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:28,885 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 144 flow [2025-02-06 13:08:28,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2025-02-06 13:08:28,886 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2025-02-06 13:08:28,886 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 144 flow [2025-02-06 13:08:28,887 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) [2025-02-06 13:08:28,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:28,887 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:08:28,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:08:28,887 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:28,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:28,888 INFO L85 PathProgramCache]: Analyzing trace with hash 28803964, now seen corresponding path program 1 times [2025-02-06 13:08:28,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:28,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978980837] [2025-02-06 13:08:28,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:28,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:28,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:08:28,922 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:08:28,922 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:28,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:29,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978980837] [2025-02-06 13:08:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978980837] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:29,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:29,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:29,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135894648] [2025-02-06 13:08:29,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:29,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:08:29,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:29,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:08:29,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:08:29,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-02-06 13:08:29,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:29,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:29,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-02-06 13:08:29,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:31,086 INFO L124 PetriNetUnfolderBase]: 24726/32940 cut-off events. [2025-02-06 13:08:31,087 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-02-06 13:08:31,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65618 conditions, 32940 events. 24726/32940 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 206142 event pairs, 20908 based on Foata normal form. 0/21514 useless extension candidates. Maximal degree in co-relation 65594. Up to 32086 conditions per place. [2025-02-06 13:08:31,261 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 54 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2025-02-06 13:08:31,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 284 flow [2025-02-06 13:08:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-02-06 13:08:31,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2025-02-06 13:08:31,266 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 144 flow. Second operand 5 states and 147 transitions. [2025-02-06 13:08:31,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 284 flow [2025-02-06 13:08:31,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:08:31,270 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 189 flow [2025-02-06 13:08:31,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2025-02-06 13:08:31,271 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -9 predicate places. [2025-02-06 13:08:31,271 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 189 flow [2025-02-06 13:08:31,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:31,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:31,271 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 13:08:31,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:08:31,272 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:31,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 892923183, now seen corresponding path program 1 times [2025-02-06 13:08:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:31,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759639709] [2025-02-06 13:08:31,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:31,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:08:31,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:08:31,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:31,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:31,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759639709] [2025-02-06 13:08:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759639709] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:31,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:31,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:31,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776919768] [2025-02-06 13:08:31,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:31,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:08:31,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:31,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:08:31,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:08:31,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-02-06 13:08:31,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:31,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:31,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-02-06 13:08:31,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:33,287 INFO L124 PetriNetUnfolderBase]: 24727/32943 cut-off events. [2025-02-06 13:08:33,287 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2025-02-06 13:08:33,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65640 conditions, 32943 events. 24727/32943 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 206134 event pairs, 20908 based on Foata normal form. 0/21519 useless extension candidates. Maximal degree in co-relation 65596. Up to 32089 conditions per place. [2025-02-06 13:08:33,425 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 55 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2025-02-06 13:08:33,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 323 flow [2025-02-06 13:08:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:33,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-02-06 13:08:33,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2025-02-06 13:08:33,426 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 189 flow. Second operand 5 states and 147 transitions. [2025-02-06 13:08:33,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 323 flow [2025-02-06 13:08:33,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:33,428 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 231 flow [2025-02-06 13:08:33,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2025-02-06 13:08:33,429 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2025-02-06 13:08:33,429 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 231 flow [2025-02-06 13:08:33,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:33,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:33,429 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 13:08:33,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:08:33,429 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:33,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:33,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1910835330, now seen corresponding path program 1 times [2025-02-06 13:08:33,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:33,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116192228] [2025-02-06 13:08:33,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:33,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:33,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:33,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:33,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:33,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:33,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116192228] [2025-02-06 13:08:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116192228] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:33,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530593800] [2025-02-06 13:08:33,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:33,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:33,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:33,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:33,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:08:33,743 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:33,757 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:33,758 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:33,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:33,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:08:33,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:33,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:08:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:33,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:34,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530593800] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:34,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:34,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:08:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959294112] [2025-02-06 13:08:34,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:34,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:08:34,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:34,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:08:34,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:08:34,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-02-06 13:08:34,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 231 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) [2025-02-06 13:08:34,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:34,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-02-06 13:08:34,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:36,503 INFO L124 PetriNetUnfolderBase]: 24729/32948 cut-off events. [2025-02-06 13:08:36,503 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2025-02-06 13:08:36,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65678 conditions, 32948 events. 24729/32948 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 206167 event pairs, 20908 based on Foata normal form. 0/21527 useless extension candidates. Maximal degree in co-relation 65618. Up to 32083 conditions per place. [2025-02-06 13:08:36,699 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 51 selfloop transitions, 18 changer transitions 0/78 dead transitions. [2025-02-06 13:08:36,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 394 flow [2025-02-06 13:08:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:08:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:08:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2025-02-06 13:08:36,701 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3189033189033189 [2025-02-06 13:08:36,701 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 231 flow. Second operand 9 states and 221 transitions. [2025-02-06 13:08:36,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 394 flow [2025-02-06 13:08:36,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:36,704 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 284 flow [2025-02-06 13:08:36,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=284, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2025-02-06 13:08:36,707 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2025-02-06 13:08:36,708 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 284 flow [2025-02-06 13:08:36,708 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) [2025-02-06 13:08:36,708 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:36,708 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-02-06 13:08:36,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:08:36,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:36,909 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:36,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash -894252045, now seen corresponding path program 1 times [2025-02-06 13:08:36,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:36,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294221633] [2025-02-06 13:08:36,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:36,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:36,918 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:08:36,931 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:08:36,931 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:36,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:37,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:37,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294221633] [2025-02-06 13:08:37,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294221633] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:37,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224058143] [2025-02-06 13:08:37,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:37,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:37,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:37,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:37,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:08:37,185 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:08:37,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:08:37,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:37,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:37,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:08:37,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:37,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:08:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:37,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:37,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224058143] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:37,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:37,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:08:37,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917600744] [2025-02-06 13:08:37,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:37,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:08:37,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:37,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:08:37,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:08:37,659 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-02-06 13:08:37,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 284 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:37,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:37,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-02-06 13:08:37,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:39,589 INFO L124 PetriNetUnfolderBase]: 24729/32947 cut-off events. [2025-02-06 13:08:39,589 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2025-02-06 13:08:39,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65689 conditions, 32947 events. 24729/32947 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 206201 event pairs, 20908 based on Foata normal form. 0/21527 useless extension candidates. Maximal degree in co-relation 65626. Up to 32084 conditions per place. [2025-02-06 13:08:39,777 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 49 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2025-02-06 13:08:39,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 416 flow [2025-02-06 13:08:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:08:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:08:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2025-02-06 13:08:39,779 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3320964749536178 [2025-02-06 13:08:39,779 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 284 flow. Second operand 7 states and 179 transitions. [2025-02-06 13:08:39,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 416 flow [2025-02-06 13:08:39,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 370 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-02-06 13:08:39,782 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 272 flow [2025-02-06 13:08:39,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=272, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2025-02-06 13:08:39,784 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2025-02-06 13:08:39,784 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 272 flow [2025-02-06 13:08:39,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:39,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:39,784 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:39,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:39,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:39,989 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:39,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:39,990 INFO L85 PathProgramCache]: Analyzing trace with hash -260887368, now seen corresponding path program 1 times [2025-02-06 13:08:39,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:39,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486528455] [2025-02-06 13:08:39,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:39,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:39,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:08:40,001 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:08:40,001 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:40,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:40,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:40,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486528455] [2025-02-06 13:08:40,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486528455] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:40,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:40,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:40,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652624676] [2025-02-06 13:08:40,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:40,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:40,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:40,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:40,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 77 [2025-02-06 13:08:40,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:40,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:40,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 77 [2025-02-06 13:08:40,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:42,753 INFO L124 PetriNetUnfolderBase]: 28428/38184 cut-off events. [2025-02-06 13:08:42,753 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2025-02-06 13:08:42,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76152 conditions, 38184 events. 28428/38184 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 2064. Compared 243324 event pairs, 24260 based on Foata normal form. 811/26545 useless extension candidates. Maximal degree in co-relation 65635. Up to 32096 conditions per place. [2025-02-06 13:08:42,908 INFO L140 encePairwiseOnDemand]: 60/77 looper letters, 101 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2025-02-06 13:08:42,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 662 flow [2025-02-06 13:08:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 206 transitions. [2025-02-06 13:08:42,909 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.535064935064935 [2025-02-06 13:08:42,909 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 272 flow. Second operand 5 states and 206 transitions. [2025-02-06 13:08:42,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 662 flow [2025-02-06 13:08:42,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 124 transitions, 598 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-02-06 13:08:42,913 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 368 flow [2025-02-06 13:08:42,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2025-02-06 13:08:42,913 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2025-02-06 13:08:42,913 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 368 flow [2025-02-06 13:08:42,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:42,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:42,913 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:42,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:08:42,914 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:42,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash 659202604, now seen corresponding path program 1 times [2025-02-06 13:08:42,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:42,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093745218] [2025-02-06 13:08:42,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:42,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:42,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:08:42,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:08:42,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:42,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:43,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:43,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093745218] [2025-02-06 13:08:43,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093745218] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:43,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:43,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:08:43,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739159101] [2025-02-06 13:08:43,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:43,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:43,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:43,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:43,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:08:43,043 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 77 [2025-02-06 13:08:43,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 368 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:43,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:43,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 77 [2025-02-06 13:08:43,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:49,157 INFO L124 PetriNetUnfolderBase]: 66214/87527 cut-off events. [2025-02-06 13:08:49,157 INFO L125 PetriNetUnfolderBase]: For 2751/2751 co-relation queries the response was YES. [2025-02-06 13:08:49,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192271 conditions, 87527 events. 66214/87527 cut-off events. For 2751/2751 co-relation queries the response was YES. Maximal size of possible extension queue 3445. Compared 576625 event pairs, 27618 based on Foata normal form. 0/58234 useless extension candidates. Maximal degree in co-relation 168158. Up to 38010 conditions per place. [2025-02-06 13:08:49,845 INFO L140 encePairwiseOnDemand]: 70/77 looper letters, 173 selfloop transitions, 12 changer transitions 0/193 dead transitions. [2025-02-06 13:08:49,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 193 transitions, 994 flow [2025-02-06 13:08:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:08:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:08:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 277 transitions. [2025-02-06 13:08:49,847 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5995670995670995 [2025-02-06 13:08:49,847 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 368 flow. Second operand 6 states and 277 transitions. [2025-02-06 13:08:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 193 transitions, 994 flow [2025-02-06 13:08:49,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 193 transitions, 990 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:49,861 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 411 flow [2025-02-06 13:08:49,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2025-02-06 13:08:49,862 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2025-02-06 13:08:49,862 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 411 flow [2025-02-06 13:08:49,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:49,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:49,863 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:49,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:08:49,863 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:49,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1596043265, now seen corresponding path program 1 times [2025-02-06 13:08:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:49,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104514597] [2025-02-06 13:08:49,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:49,870 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:08:49,874 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:08:49,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:49,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:49,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:49,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104514597] [2025-02-06 13:08:49,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104514597] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:49,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:49,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:49,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277917824] [2025-02-06 13:08:49,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:49,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:49,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:49,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:49,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:49,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2025-02-06 13:08:49,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 411 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:49,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:49,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2025-02-06 13:08:49,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand