./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.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 c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:09:41,949 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:09:42,011 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:09:42,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:09:42,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:09:42,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:09:42,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:09:42,044 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:09:42,045 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:09:42,045 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:09:42,045 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:09:42,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:09:42,046 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:09:42,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:09:42,046 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:09:42,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:09:42,046 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:09:42,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:09:42,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:09:42,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:09:42,047 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:09:42,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:09:42,047 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:09:42,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:09:42,048 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:09:42,048 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:09:42,048 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:09:42,048 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:09:42,048 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 -> c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c [2025-01-10 01:09:42,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:09:42,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:09:42,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:09:42,290 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:09:42,291 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:09:42,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-01-10 01:09:43,531 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/35d33464e/38923050f82244f9aa68d075f5acf3f2/FLAGf5df2c33a [2025-01-10 01:09:43,828 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:09:43,829 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-01-10 01:09:43,838 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/35d33464e/38923050f82244f9aa68d075f5acf3f2/FLAGf5df2c33a [2025-01-10 01:09:44,090 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/35d33464e/38923050f82244f9aa68d075f5acf3f2 [2025-01-10 01:09:44,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:09:44,094 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:09:44,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:09:44,095 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:09:44,102 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:09:44,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a63883f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44, skipping insertion in model container [2025-01-10 01:09:44,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,114 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:09:44,231 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-10 01:09:44,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:09:44,243 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:09:44,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:09:44,293 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:09:44,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44 WrapperNode [2025-01-10 01:09:44,294 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:09:44,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:09:44,295 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:09:44,295 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:09:44,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,306 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,325 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 321 [2025-01-10 01:09:44,325 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:09:44,326 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:09:44,326 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:09:44,326 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:09:44,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,335 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,354 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]. [2025-01-10 01:09:44,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,359 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,366 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,366 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,369 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,370 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,371 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,376 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:09:44,377 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:09:44,377 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:09:44,377 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:09:44,378 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (1/1) ... [2025-01-10 01:09:44,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:09:44,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:09:44,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-10 01:09:44,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-10 01:09:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:09:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:09:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:09:44,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:09:44,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-01-10 01:09:44,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-01-10 01:09:44,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-10 01:09:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-10 01:09:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:09:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:09:44,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:09:44,429 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 01:09:44,508 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:09:44,510 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:09:44,923 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:09:44,923 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:09:45,245 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:09:45,245 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:09:45,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:09:45 BoogieIcfgContainer [2025-01-10 01:09:45,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:09:45,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:09:45,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:09:45,250 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:09:45,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:09:44" (1/3) ... [2025-01-10 01:09:45,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe888df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:09:45, skipping insertion in model container [2025-01-10 01:09:45,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:09:44" (2/3) ... [2025-01-10 01:09:45,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe888df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:09:45, skipping insertion in model container [2025-01-10 01:09:45,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:09:45" (3/3) ... [2025-01-10 01:09:45,251 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series3.wvr.c [2025-01-10 01:09:45,260 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:09:45,261 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series3.wvr.c that has 5 procedures, 71 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2025-01-10 01:09:45,261 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:09:45,310 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-01-10 01:09:45,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 77 transitions, 182 flow [2025-01-10 01:09:45,352 INFO L124 PetriNetUnfolderBase]: 7/73 cut-off events. [2025-01-10 01:09:45,357 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-01-10 01:09:45,359 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 11. Compared 197 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. [2025-01-10 01:09:45,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 77 transitions, 182 flow [2025-01-10 01:09:45,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 168 flow [2025-01-10 01:09:45,366 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:09:45,372 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;@1453a29f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:09:45,372 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2025-01-10 01:09:45,375 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:09:45,375 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-10 01:09:45,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:09:45,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:09:45,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:09:45,375 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:09:45,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:09:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash 991934, now seen corresponding path program 1 times [2025-01-10 01:09:45,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:09:45,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953341272] [2025-01-10 01:09:45,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:45,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:09:45,427 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:09:45,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:09:45,439 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:45,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:45,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:09:45,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953341272] [2025-01-10 01:09:45,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953341272] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:09:45,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:09:45,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:09:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376273243] [2025-01-10 01:09:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:09:45,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:09:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:09:45,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:09:45,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:09:45,595 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:09:45,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:45,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:09:45,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:09:45,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:09:47,654 INFO L124 PetriNetUnfolderBase]: 17936/23922 cut-off events. [2025-01-10 01:09:47,655 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2025-01-10 01:09:47,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46767 conditions, 23922 events. 17936/23922 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 2002. Compared 154141 event pairs, 11530 based on Foata normal form. 1/11214 useless extension candidates. Maximal degree in co-relation 44660. Up to 21814 conditions per place. [2025-01-10 01:09:47,848 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2025-01-10 01:09:47,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 244 flow [2025-01-10 01:09:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:09:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:09:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2025-01-10 01:09:47,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2025-01-10 01:09:47,857 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 168 flow. Second operand 3 states and 126 transitions. [2025-01-10 01:09:47,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 244 flow [2025-01-10 01:09:47,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-01-10 01:09:47,943 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 142 flow [2025-01-10 01:09:47,944 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} [2025-01-10 01:09:47,946 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2025-01-10 01:09:47,946 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 142 flow [2025-01-10 01:09:47,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:47,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:09:47,946 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:09:47,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:09:47,947 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:09:47,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:09:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash 991935, now seen corresponding path program 1 times [2025-01-10 01:09:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:09:47,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456654963] [2025-01-10 01:09:47,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:09:47,953 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:09:47,965 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:09:47,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:47,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:48,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:09:48,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456654963] [2025-01-10 01:09:48,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456654963] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:09:48,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:09:48,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:09:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300617041] [2025-01-10 01:09:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:09:48,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:09:48,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:09:48,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:09:48,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:09:48,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:09:48,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:48,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:09:48,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:09:48,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:09:49,522 INFO L124 PetriNetUnfolderBase]: 17937/23925 cut-off events. [2025-01-10 01:09:49,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:09:49,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46151 conditions, 23925 events. 17937/23925 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2002. Compared 154393 event pairs, 11530 based on Foata normal form. 0/11213 useless extension candidates. Maximal degree in co-relation 46114. Up to 21827 conditions per place. [2025-01-10 01:09:49,668 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 47 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2025-01-10 01:09:49,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 250 flow [2025-01-10 01:09:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:09:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:09:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2025-01-10 01:09:49,670 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2025-01-10 01:09:49,671 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 142 flow. Second operand 4 states and 152 transitions. [2025-01-10 01:09:49,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 250 flow [2025-01-10 01:09:49,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:09:49,674 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 165 flow [2025-01-10 01:09:49,674 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2025-01-10 01:09:49,675 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -10 predicate places. [2025-01-10 01:09:49,675 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 165 flow [2025-01-10 01:09:49,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:49,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:09:49,675 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-01-10 01:09:49,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:09:49,676 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:09:49,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:09:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 30752630, now seen corresponding path program 1 times [2025-01-10 01:09:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:09:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882078393] [2025-01-10 01:09:49,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:49,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:09:49,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-01-10 01:09:49,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-01-10 01:09:49,706 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:49,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:49,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:09:49,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882078393] [2025-01-10 01:09:49,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882078393] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:09:49,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:09:49,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:09:49,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470807830] [2025-01-10 01:09:49,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:09:49,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:09:49,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:09:49,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:09:49,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:09:49,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:09:49,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:49,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:09:49,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:09:49,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:09:51,471 INFO L124 PetriNetUnfolderBase]: 17938/23928 cut-off events. [2025-01-10 01:09:51,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:09:51,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46168 conditions, 23928 events. 17938/23928 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2002. Compared 154440 event pairs, 11530 based on Foata normal form. 0/11215 useless extension candidates. Maximal degree in co-relation 46143. Up to 21826 conditions per place. [2025-01-10 01:09:51,843 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 47 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2025-01-10 01:09:51,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 279 flow [2025-01-10 01:09:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:09:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:09:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2025-01-10 01:09:51,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2025-01-10 01:09:51,848 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 165 flow. Second operand 5 states and 180 transitions. [2025-01-10 01:09:51,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 279 flow [2025-01-10 01:09:51,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:09:51,850 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 199 flow [2025-01-10 01:09:51,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2025-01-10 01:09:51,851 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2025-01-10 01:09:51,851 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 199 flow [2025-01-10 01:09:51,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:51,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:09:51,851 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-01-10 01:09:51,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-10 01:09:51,851 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:09:51,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:09:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash 953281431, now seen corresponding path program 1 times [2025-01-10 01:09:51,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:09:51,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563690699] [2025-01-10 01:09:51,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:51,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:09:51,862 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:09:51,879 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:09:51,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:51,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:52,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:09:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563690699] [2025-01-10 01:09:52,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563690699] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:09:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391500201] [2025-01-10 01:09:52,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:52,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:09:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:09:52,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:09:52,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-10 01:09:52,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:09:52,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:09:52,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:52,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:52,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:09:52,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:09:52,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-10 01:09:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:52,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:09:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:52,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391500201] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:09:52,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:09:52,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-01-10 01:09:52,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503642801] [2025-01-10 01:09:52,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:09:52,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:09:52,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:09:52,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:09:52,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:09:52,594 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:09:52,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 199 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:52,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:09:52,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:09:52,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:09:53,915 INFO L124 PetriNetUnfolderBase]: 17939/23930 cut-off events. [2025-01-10 01:09:53,916 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:09:53,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46191 conditions, 23930 events. 17939/23930 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2002. Compared 154607 event pairs, 11530 based on Foata normal form. 0/11220 useless extension candidates. Maximal degree in co-relation 46153. Up to 21827 conditions per place. [2025-01-10 01:09:54,084 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 46 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2025-01-10 01:09:54,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 322 flow [2025-01-10 01:09:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:09:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:09:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 255 transitions. [2025-01-10 01:09:54,086 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.413961038961039 [2025-01-10 01:09:54,086 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 199 flow. Second operand 8 states and 255 transitions. [2025-01-10 01:09:54,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 322 flow [2025-01-10 01:09:54,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:09:54,088 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 229 flow [2025-01-10 01:09:54,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=229, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2025-01-10 01:09:54,089 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2025-01-10 01:09:54,089 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 229 flow [2025-01-10 01:09:54,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:54,089 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:09:54,089 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-01-10 01:09:54,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 01:09:54,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:09:54,294 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:09:54,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:09:54,295 INFO L85 PathProgramCache]: Analyzing trace with hash 953333543, now seen corresponding path program 1 times [2025-01-10 01:09:54,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:09:54,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905432171] [2025-01-10 01:09:54,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:54,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:09:54,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:09:54,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:09:54,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:54,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:09:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905432171] [2025-01-10 01:09:54,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905432171] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:09:54,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:09:54,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:09:54,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409311496] [2025-01-10 01:09:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:09:54,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:09:54,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:09:54,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:09:54,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:09:54,540 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:09:54,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:54,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:09:54,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:09:54,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:09:56,379 INFO L124 PetriNetUnfolderBase]: 17940/23933 cut-off events. [2025-01-10 01:09:56,379 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:09:56,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46207 conditions, 23933 events. 17940/23933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2002. Compared 154661 event pairs, 11530 based on Foata normal form. 0/11222 useless extension candidates. Maximal degree in co-relation 46161. Up to 21831 conditions per place. [2025-01-10 01:09:56,589 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 50 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2025-01-10 01:09:56,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 353 flow [2025-01-10 01:09:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:09:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:09:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2025-01-10 01:09:56,591 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4649350649350649 [2025-01-10 01:09:56,592 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 229 flow. Second operand 5 states and 179 transitions. [2025-01-10 01:09:56,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 353 flow [2025-01-10 01:09:56,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 306 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-01-10 01:09:56,595 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 225 flow [2025-01-10 01:09:56,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2025-01-10 01:09:56,595 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2025-01-10 01:09:56,596 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 225 flow [2025-01-10 01:09:56,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:56,596 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:09:56,596 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-01-10 01:09:56,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-10 01:09:56,596 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:09:56,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:09:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash -511461299, now seen corresponding path program 1 times [2025-01-10 01:09:56,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:09:56,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890470141] [2025-01-10 01:09:56,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:09:56,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:09:56,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:09:56,617 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:56,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:56,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:09:56,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890470141] [2025-01-10 01:09:56,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890470141] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:09:56,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388338114] [2025-01-10 01:09:56,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:56,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:09:56,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:09:56,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:09:56,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-10 01:09:56,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:09:56,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:09:56,876 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:56,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:56,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 01:09:56,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:09:56,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-10 01:09:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:57,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:09:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:57,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388338114] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:09:57,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:09:57,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-01-10 01:09:57,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711870110] [2025-01-10 01:09:57,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:09:57,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:09:57,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:09:57,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:09:57,229 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:09:57,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:09:57,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 225 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:57,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:09:57,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:09:57,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:09:58,670 INFO L124 PetriNetUnfolderBase]: 17940/23932 cut-off events. [2025-01-10 01:09:58,670 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-01-10 01:09:58,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46199 conditions, 23932 events. 17940/23932 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2002. Compared 154641 event pairs, 11530 based on Foata normal form. 0/11224 useless extension candidates. Maximal degree in co-relation 46150. Up to 21821 conditions per place. [2025-01-10 01:09:58,839 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 15 changer transitions 0/75 dead transitions. [2025-01-10 01:09:58,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 75 transitions, 337 flow [2025-01-10 01:09:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:09:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:09:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2025-01-10 01:09:58,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4230055658627087 [2025-01-10 01:09:58,840 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 225 flow. Second operand 7 states and 228 transitions. [2025-01-10 01:09:58,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 75 transitions, 337 flow [2025-01-10 01:09:58,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:09:58,842 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 244 flow [2025-01-10 01:09:58,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=244, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2025-01-10 01:09:58,843 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2025-01-10 01:09:58,843 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 244 flow [2025-01-10 01:09:58,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:58,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:09:58,844 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-01-10 01:09:58,850 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 [2025-01-10 01:09:59,045 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 [2025-01-10 01:09:59,046 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:09:59,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:09:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1325531928, now seen corresponding path program 1 times [2025-01-10 01:09:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:09:59,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019117738] [2025-01-10 01:09:59,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:59,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:09:59,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 01:09:59,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 01:09:59,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:59,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:59,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:09:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019117738] [2025-01-10 01:09:59,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019117738] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:09:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428908327] [2025-01-10 01:09:59,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:09:59,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:09:59,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:09:59,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:09:59,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-10 01:09:59,359 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 01:09:59,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 01:09:59,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:09:59,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:09:59,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 01:09:59,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:09:59,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-10 01:09:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:59,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:09:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:09:59,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428908327] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:09:59,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:09:59,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-01-10 01:09:59,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121341966] [2025-01-10 01:09:59,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:09:59,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:09:59,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:09:59,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:09:59,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:09:59,750 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:09:59,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 244 flow. Second operand has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:09:59,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:09:59,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:09:59,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:01,099 INFO L124 PetriNetUnfolderBase]: 17940/23931 cut-off events. [2025-01-10 01:10:01,099 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:10:01,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46207 conditions, 23931 events. 17940/23931 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2002. Compared 154428 event pairs, 11530 based on Foata normal form. 0/11224 useless extension candidates. Maximal degree in co-relation 46152. Up to 21821 conditions per place. [2025-01-10 01:10:01,303 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 39 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2025-01-10 01:10:01,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 74 transitions, 354 flow [2025-01-10 01:10:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:10:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:10:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2025-01-10 01:10:01,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42115027829313545 [2025-01-10 01:10:01,304 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 244 flow. Second operand 7 states and 227 transitions. [2025-01-10 01:10:01,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 74 transitions, 354 flow [2025-01-10 01:10:01,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 327 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-01-10 01:10:01,306 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 249 flow [2025-01-10 01:10:01,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2025-01-10 01:10:01,307 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2025-01-10 01:10:01,307 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 249 flow [2025-01-10 01:10:01,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:01,307 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:01,307 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:01,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:01,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:01,512 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:01,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1688772734, now seen corresponding path program 1 times [2025-01-10 01:10:01,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:01,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563487051] [2025-01-10 01:10:01,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:01,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:01,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-10 01:10:01,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-10 01:10:01,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:01,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:01,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:01,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563487051] [2025-01-10 01:10:01,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563487051] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:01,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:01,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:10:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129027006] [2025-01-10 01:10:01,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:01,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:10:01,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:01,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:10:01,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:10:01,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:01,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:01,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:01,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:01,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:02,597 INFO L124 PetriNetUnfolderBase]: 13482/18168 cut-off events. [2025-01-10 01:10:02,598 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-01-10 01:10:02,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35025 conditions, 18168 events. 13482/18168 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 1506. Compared 116463 event pairs, 8782 based on Foata normal form. 0/9213 useless extension candidates. Maximal degree in co-relation 34964. Up to 16483 conditions per place. [2025-01-10 01:10:02,702 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 52 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2025-01-10 01:10:02,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 355 flow [2025-01-10 01:10:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:10:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:10:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2025-01-10 01:10:02,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2025-01-10 01:10:02,703 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 249 flow. Second operand 4 states and 145 transitions. [2025-01-10 01:10:02,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 355 flow [2025-01-10 01:10:02,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 319 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-01-10 01:10:02,705 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 215 flow [2025-01-10 01:10:02,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2025-01-10 01:10:02,705 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2025-01-10 01:10:02,705 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 215 flow [2025-01-10 01:10:02,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:02,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:02,705 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:02,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-10 01:10:02,706 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:02,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1688772733, now seen corresponding path program 1 times [2025-01-10 01:10:02,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:02,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537646224] [2025-01-10 01:10:02,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:02,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:02,722 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-10 01:10:02,732 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-10 01:10:02,736 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:02,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:10:02,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:02,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537646224] [2025-01-10 01:10:02,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537646224] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:02,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:02,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:10:02,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034527833] [2025-01-10 01:10:02,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:02,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:10:02,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:02,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:10:02,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:10:02,789 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2025-01-10 01:10:02,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:02,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:02,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2025-01-10 01:10:02,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:03,758 INFO L124 PetriNetUnfolderBase]: 14728/19996 cut-off events. [2025-01-10 01:10:03,759 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:10:03,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38578 conditions, 19996 events. 14728/19996 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1524. Compared 130354 event pairs, 9699 based on Foata normal form. 347/11038 useless extension candidates. Maximal degree in co-relation 34887. Up to 16501 conditions per place. [2025-01-10 01:10:03,920 INFO L140 encePairwiseOnDemand]: 63/77 looper letters, 85 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2025-01-10 01:10:03,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 509 flow [2025-01-10 01:10:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:10:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:10:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2025-01-10 01:10:03,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5974025974025974 [2025-01-10 01:10:03,921 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 215 flow. Second operand 5 states and 230 transitions. [2025-01-10 01:10:03,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 509 flow [2025-01-10 01:10:03,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 109 transitions, 503 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:03,923 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 273 flow [2025-01-10 01:10:03,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2025-01-10 01:10:03,926 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2025-01-10 01:10:03,927 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 273 flow [2025-01-10 01:10:03,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:03,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:03,927 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:03,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-01-10 01:10:03,927 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:03,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:03,927 INFO L85 PathProgramCache]: Analyzing trace with hash -429449738, now seen corresponding path program 1 times [2025-01-10 01:10:03,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:03,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995770038] [2025-01-10 01:10:03,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:03,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:03,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:10:03,941 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:10:03,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:03,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:03,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995770038] [2025-01-10 01:10:03,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995770038] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:03,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:03,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:10:03,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153564873] [2025-01-10 01:10:03,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:03,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:10:03,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:03,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:10:03,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:10:03,999 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2025-01-10 01:10:03,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:03,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:04,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2025-01-10 01:10:04,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:05,091 INFO L124 PetriNetUnfolderBase]: 16145/22639 cut-off events. [2025-01-10 01:10:05,091 INFO L125 PetriNetUnfolderBase]: For 1700/1700 co-relation queries the response was YES. [2025-01-10 01:10:05,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49540 conditions, 22639 events. 16145/22639 cut-off events. For 1700/1700 co-relation queries the response was YES. Maximal size of possible extension queue 1633. Compared 158279 event pairs, 10806 based on Foata normal form. 325/12568 useless extension candidates. Maximal degree in co-relation 45444. Up to 18181 conditions per place. [2025-01-10 01:10:05,283 INFO L140 encePairwiseOnDemand]: 67/77 looper letters, 86 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2025-01-10 01:10:05,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 109 transitions, 573 flow [2025-01-10 01:10:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:10:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:10:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2025-01-10 01:10:05,284 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6266233766233766 [2025-01-10 01:10:05,284 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 273 flow. Second operand 4 states and 193 transitions. [2025-01-10 01:10:05,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 109 transitions, 573 flow [2025-01-10 01:10:05,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:05,294 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 295 flow [2025-01-10 01:10:05,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2025-01-10 01:10:05,295 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2025-01-10 01:10:05,295 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 295 flow [2025-01-10 01:10:05,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:05,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:05,295 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:05,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-01-10 01:10:05,295 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:05,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:05,296 INFO L85 PathProgramCache]: Analyzing trace with hash 992355928, now seen corresponding path program 1 times [2025-01-10 01:10:05,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:05,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469827916] [2025-01-10 01:10:05,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:05,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:10:05,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:10:05,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:05,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:05,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:05,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469827916] [2025-01-10 01:10:05,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469827916] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:05,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:05,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:10:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371025219] [2025-01-10 01:10:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:05,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:10:05,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:05,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:10:05,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:10:05,458 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:05,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:05,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:05,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:05,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:06,424 INFO L124 PetriNetUnfolderBase]: 11344/16468 cut-off events. [2025-01-10 01:10:06,425 INFO L125 PetriNetUnfolderBase]: For 2582/2582 co-relation queries the response was YES. [2025-01-10 01:10:06,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39275 conditions, 16468 events. 11344/16468 cut-off events. For 2582/2582 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 116125 event pairs, 7648 based on Foata normal form. 0/9818 useless extension candidates. Maximal degree in co-relation 31083. Up to 14309 conditions per place. [2025-01-10 01:10:06,547 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 50 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2025-01-10 01:10:06,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 401 flow [2025-01-10 01:10:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:10:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:10:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2025-01-10 01:10:06,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2025-01-10 01:10:06,549 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 295 flow. Second operand 5 states and 168 transitions. [2025-01-10 01:10:06,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 401 flow [2025-01-10 01:10:06,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 74 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:10:06,553 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 296 flow [2025-01-10 01:10:06,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2025-01-10 01:10:06,554 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2025-01-10 01:10:06,554 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 296 flow [2025-01-10 01:10:06,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:06,554 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:06,554 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:06,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-01-10 01:10:06,554 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:06,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:06,555 INFO L85 PathProgramCache]: Analyzing trace with hash 992355929, now seen corresponding path program 1 times [2025-01-10 01:10:06,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:06,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753364761] [2025-01-10 01:10:06,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:06,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:06,562 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:10:06,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:10:06,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:06,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:06,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:06,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753364761] [2025-01-10 01:10:06,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753364761] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:06,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104987798] [2025-01-10 01:10:06,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:06,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:06,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:06,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:10:06,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-10 01:10:06,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:10:06,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:10:06,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:06,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:06,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-10 01:10:06,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:06,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:10:06,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:10:06,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-01-10 01:10:06,866 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-10 01:10:06,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-01-10 01:10:06,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:10:06,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-01-10 01:10:06,892 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:10:06,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-10 01:10:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:06,916 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:10:06,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104987798] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:06,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 01:10:06,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2025-01-10 01:10:06,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806250004] [2025-01-10 01:10:06,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:06,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:10:06,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:06,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:10:06,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:10:06,945 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:06,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:06,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:06,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:06,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:07,534 INFO L124 PetriNetUnfolderBase]: 7449/11101 cut-off events. [2025-01-10 01:10:07,534 INFO L125 PetriNetUnfolderBase]: For 1961/1961 co-relation queries the response was YES. [2025-01-10 01:10:07,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25826 conditions, 11101 events. 7449/11101 cut-off events. For 1961/1961 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 77560 event pairs, 5072 based on Foata normal form. 0/7336 useless extension candidates. Maximal degree in co-relation 18904. Up to 9570 conditions per place. [2025-01-10 01:10:07,616 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 51 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2025-01-10 01:10:07,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 398 flow [2025-01-10 01:10:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:10:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:10:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2025-01-10 01:10:07,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2025-01-10 01:10:07,617 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 296 flow. Second operand 4 states and 141 transitions. [2025-01-10 01:10:07,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 398 flow [2025-01-10 01:10:07,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:07,622 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 285 flow [2025-01-10 01:10:07,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2025-01-10 01:10:07,623 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2025-01-10 01:10:07,623 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 285 flow [2025-01-10 01:10:07,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:07,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:07,623 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:07,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:07,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-10 01:10:07,827 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:07,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash 992355931, now seen corresponding path program 1 times [2025-01-10 01:10:07,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:07,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424850796] [2025-01-10 01:10:07,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:07,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:07,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 01:10:07,843 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:10:07,844 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:07,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:07,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:07,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424850796] [2025-01-10 01:10:07,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424850796] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:07,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:07,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:10:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410463355] [2025-01-10 01:10:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:07,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:10:07,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:07,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:10:07,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:10:07,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:07,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:07,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:07,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:07,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:09,157 INFO L124 PetriNetUnfolderBase]: 15270/22302 cut-off events. [2025-01-10 01:10:09,158 INFO L125 PetriNetUnfolderBase]: For 3196/3468 co-relation queries the response was YES. [2025-01-10 01:10:09,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51797 conditions, 22302 events. 15270/22302 cut-off events. For 3196/3468 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 166867 event pairs, 8557 based on Foata normal form. 0/15380 useless extension candidates. Maximal degree in co-relation 35900. Up to 13319 conditions per place. [2025-01-10 01:10:09,339 INFO L140 encePairwiseOnDemand]: 71/77 looper letters, 95 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2025-01-10 01:10:09,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 118 transitions, 628 flow [2025-01-10 01:10:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:10:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:10:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2025-01-10 01:10:09,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2025-01-10 01:10:09,340 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 285 flow. Second operand 6 states and 242 transitions. [2025-01-10 01:10:09,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 118 transitions, 628 flow [2025-01-10 01:10:09,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 118 transitions, 623 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:09,347 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 308 flow [2025-01-10 01:10:09,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2025-01-10 01:10:09,347 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2025-01-10 01:10:09,347 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 308 flow [2025-01-10 01:10:09,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:09,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:09,348 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:09,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-01-10 01:10:09,348 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:09,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash 392543180, now seen corresponding path program 1 times [2025-01-10 01:10:09,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:09,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515879735] [2025-01-10 01:10:09,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:09,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:09,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 01:10:09,361 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:10:09,361 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:09,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:09,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515879735] [2025-01-10 01:10:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515879735] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330851625] [2025-01-10 01:10:09,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:09,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:09,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:09,470 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:10:09,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-10 01:10:09,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 01:10:09,532 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:10:09,532 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:09,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:09,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:10:09,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:09,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:09,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-01-10 01:10:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:10:09,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330851625] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:09,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:09,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-01-10 01:10:09,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301007543] [2025-01-10 01:10:09,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:09,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 01:10:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:09,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 01:10:09,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-01-10 01:10:09,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2025-01-10 01:10:09,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 308 flow. Second operand has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:09,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:09,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2025-01-10 01:10:09,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:11,038 INFO L124 PetriNetUnfolderBase]: 11599/17492 cut-off events. [2025-01-10 01:10:11,038 INFO L125 PetriNetUnfolderBase]: For 2833/2833 co-relation queries the response was YES. [2025-01-10 01:10:11,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41067 conditions, 17492 events. 11599/17492 cut-off events. For 2833/2833 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 131774 event pairs, 5266 based on Foata normal form. 0/12564 useless extension candidates. Maximal degree in co-relation 31424. Up to 6065 conditions per place. [2025-01-10 01:10:11,156 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 93 selfloop transitions, 14 changer transitions 0/125 dead transitions. [2025-01-10 01:10:11,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 125 transitions, 675 flow [2025-01-10 01:10:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:10:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:10:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 269 transitions. [2025-01-10 01:10:11,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5822510822510822 [2025-01-10 01:10:11,158 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 308 flow. Second operand 6 states and 269 transitions. [2025-01-10 01:10:11,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 125 transitions, 675 flow [2025-01-10 01:10:11,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 668 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:11,164 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 339 flow [2025-01-10 01:10:11,164 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2025-01-10 01:10:11,165 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2025-01-10 01:10:11,165 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 339 flow [2025-01-10 01:10:11,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:11,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:11,165 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:11,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:11,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-01-10 01:10:11,366 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:11,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:11,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1914590527, now seen corresponding path program 1 times [2025-01-10 01:10:11,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:11,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407240802] [2025-01-10 01:10:11,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:11,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 01:10:11,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:10:11,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:11,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:11,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:11,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407240802] [2025-01-10 01:10:11,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407240802] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:11,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:11,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:10:11,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949720659] [2025-01-10 01:10:11,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:11,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:10:11,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:11,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:10:11,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:10:11,485 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:11,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:11,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:11,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:11,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:12,358 INFO L124 PetriNetUnfolderBase]: 9930/15506 cut-off events. [2025-01-10 01:10:12,359 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2025-01-10 01:10:12,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36543 conditions, 15506 events. 9930/15506 cut-off events. For 3796/3796 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 121254 event pairs, 7635 based on Foata normal form. 0/11425 useless extension candidates. Maximal degree in co-relation 28286. Up to 13287 conditions per place. [2025-01-10 01:10:12,507 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 48 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2025-01-10 01:10:12,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 445 flow [2025-01-10 01:10:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:10:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:10:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2025-01-10 01:10:12,509 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42597402597402595 [2025-01-10 01:10:12,509 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 339 flow. Second operand 5 states and 164 transitions. [2025-01-10 01:10:12,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 445 flow [2025-01-10 01:10:12,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 73 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:12,520 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 325 flow [2025-01-10 01:10:12,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2025-01-10 01:10:12,520 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2025-01-10 01:10:12,520 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 325 flow [2025-01-10 01:10:12,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:12,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:12,521 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:12,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-01-10 01:10:12,521 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:12,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1914590528, now seen corresponding path program 1 times [2025-01-10 01:10:12,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:12,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316915084] [2025-01-10 01:10:12,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:12,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:12,527 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 01:10:12,532 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 01:10:12,532 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:12,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:12,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316915084] [2025-01-10 01:10:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316915084] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:12,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:10:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303080065] [2025-01-10 01:10:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:12,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:10:12,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:12,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:10:12,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:10:12,663 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:12,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 325 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:12,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:12,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:12,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:13,575 INFO L124 PetriNetUnfolderBase]: 9940/14889 cut-off events. [2025-01-10 01:10:13,576 INFO L125 PetriNetUnfolderBase]: For 4224/5199 co-relation queries the response was YES. [2025-01-10 01:10:13,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35446 conditions, 14889 events. 9940/14889 cut-off events. For 4224/5199 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 111983 event pairs, 8064 based on Foata normal form. 0/11521 useless extension candidates. Maximal degree in co-relation 28760. Up to 11849 conditions per place. [2025-01-10 01:10:13,653 INFO L140 encePairwiseOnDemand]: 71/77 looper letters, 84 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2025-01-10 01:10:13,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 108 transitions, 608 flow [2025-01-10 01:10:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:10:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:10:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2025-01-10 01:10:13,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2025-01-10 01:10:13,654 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 325 flow. Second operand 6 states and 230 transitions. [2025-01-10 01:10:13,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 108 transitions, 608 flow [2025-01-10 01:10:13,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 108 transitions, 597 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:13,666 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 342 flow [2025-01-10 01:10:13,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2025-01-10 01:10:13,666 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2025-01-10 01:10:13,666 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 342 flow [2025-01-10 01:10:13,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:13,666 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:13,666 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:13,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-01-10 01:10:13,670 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:13,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:13,670 INFO L85 PathProgramCache]: Analyzing trace with hash 406223409, now seen corresponding path program 1 times [2025-01-10 01:10:13,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:13,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129830446] [2025-01-10 01:10:13,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:13,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:13,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:10:13,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:10:13,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:13,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:13,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:13,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129830446] [2025-01-10 01:10:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129830446] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:13,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:13,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:10:13,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911523008] [2025-01-10 01:10:13,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:13,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:10:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:13,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:10:13,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:10:13,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:13,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 342 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:13,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:13,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:13,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:14,451 INFO L124 PetriNetUnfolderBase]: 5672/9340 cut-off events. [2025-01-10 01:10:14,452 INFO L125 PetriNetUnfolderBase]: For 2591/2591 co-relation queries the response was YES. [2025-01-10 01:10:14,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21551 conditions, 9340 events. 5672/9340 cut-off events. For 2591/2591 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 72291 event pairs, 4568 based on Foata normal form. 0/7582 useless extension candidates. Maximal degree in co-relation 17353. Up to 7845 conditions per place. [2025-01-10 01:10:14,523 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 47 selfloop transitions, 6 changer transitions 0/72 dead transitions. [2025-01-10 01:10:14,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 72 transitions, 440 flow [2025-01-10 01:10:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:10:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:10:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2025-01-10 01:10:14,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2025-01-10 01:10:14,524 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 342 flow. Second operand 4 states and 138 transitions. [2025-01-10 01:10:14,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 72 transitions, 440 flow [2025-01-10 01:10:14,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 72 transitions, 426 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:14,531 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 332 flow [2025-01-10 01:10:14,531 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2025-01-10 01:10:14,531 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 12 predicate places. [2025-01-10 01:10:14,532 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 332 flow [2025-01-10 01:10:14,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:14,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:14,532 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:14,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-01-10 01:10:14,532 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:14,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:14,533 INFO L85 PathProgramCache]: Analyzing trace with hash 406223407, now seen corresponding path program 1 times [2025-01-10 01:10:14,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:14,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718930771] [2025-01-10 01:10:14,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:14,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:14,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:10:14,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:10:14,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:14,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:14,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:14,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718930771] [2025-01-10 01:10:14,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718930771] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:14,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751657110] [2025-01-10 01:10:14,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:14,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:14,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:14,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:10:14,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-10 01:10:14,742 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:10:14,758 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:10:14,758 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:14,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:14,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:10:14,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:14,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:14,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-01-10 01:10:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:14,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751657110] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:14,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:14,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-01-10 01:10:14,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108507156] [2025-01-10 01:10:14,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:14,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 01:10:14,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:14,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 01:10:14,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-01-10 01:10:15,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2025-01-10 01:10:15,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 332 flow. Second operand has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:15,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:15,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2025-01-10 01:10:15,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:15,948 INFO L124 PetriNetUnfolderBase]: 5877/9704 cut-off events. [2025-01-10 01:10:15,948 INFO L125 PetriNetUnfolderBase]: For 2931/2931 co-relation queries the response was YES. [2025-01-10 01:10:15,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22612 conditions, 9704 events. 5877/9704 cut-off events. For 2931/2931 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 74767 event pairs, 2534 based on Foata normal form. 0/8457 useless extension candidates. Maximal degree in co-relation 18259. Up to 4284 conditions per place. [2025-01-10 01:10:16,000 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 81 selfloop transitions, 14 changer transitions 0/114 dead transitions. [2025-01-10 01:10:16,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 114 transitions, 646 flow [2025-01-10 01:10:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:10:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:10:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 255 transitions. [2025-01-10 01:10:16,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2025-01-10 01:10:16,002 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 332 flow. Second operand 6 states and 255 transitions. [2025-01-10 01:10:16,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 114 transitions, 646 flow [2025-01-10 01:10:16,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 114 transitions, 637 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:10:16,007 INFO L231 Difference]: Finished difference. Result has 94 places, 73 transitions, 361 flow [2025-01-10 01:10:16,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=94, PETRI_TRANSITIONS=73} [2025-01-10 01:10:16,007 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2025-01-10 01:10:16,007 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 73 transitions, 361 flow [2025-01-10 01:10:16,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:16,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:16,008 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:16,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-10 01:10:16,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-10 01:10:16,209 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:16,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash -130300020, now seen corresponding path program 1 times [2025-01-10 01:10:16,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271893923] [2025-01-10 01:10:16,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:16,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 01:10:16,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:10:16,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:16,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:10:16,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:16,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271893923] [2025-01-10 01:10:16,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271893923] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:10:16,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:10:16,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:10:16,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66839112] [2025-01-10 01:10:16,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:10:16,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:10:16,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:16,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:10:16,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:10:16,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2025-01-10 01:10:16,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 73 transitions, 361 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:16,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:16,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2025-01-10 01:10:16,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:16,855 INFO L124 PetriNetUnfolderBase]: 6009/9884 cut-off events. [2025-01-10 01:10:16,855 INFO L125 PetriNetUnfolderBase]: For 3754/3754 co-relation queries the response was YES. [2025-01-10 01:10:16,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23515 conditions, 9884 events. 6009/9884 cut-off events. For 3754/3754 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 72572 event pairs, 2494 based on Foata normal form. 113/8667 useless extension candidates. Maximal degree in co-relation 19120. Up to 4837 conditions per place. [2025-01-10 01:10:16,957 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 72 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2025-01-10 01:10:16,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 569 flow [2025-01-10 01:10:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:10:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:10:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2025-01-10 01:10:16,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6147186147186147 [2025-01-10 01:10:16,958 INFO L175 Difference]: Start difference. First operand has 94 places, 73 transitions, 361 flow. Second operand 3 states and 142 transitions. [2025-01-10 01:10:16,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 569 flow [2025-01-10 01:10:16,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 545 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:16,963 INFO L231 Difference]: Finished difference. Result has 94 places, 74 transitions, 351 flow [2025-01-10 01:10:16,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2025-01-10 01:10:16,964 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2025-01-10 01:10:16,964 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 351 flow [2025-01-10 01:10:16,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:16,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:16,964 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:16,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-01-10 01:10:16,964 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:16,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash 892597491, now seen corresponding path program 1 times [2025-01-10 01:10:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:16,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928405657] [2025-01-10 01:10:16,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:16,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:16,970 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 01:10:16,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:10:16,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:16,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:17,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:17,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928405657] [2025-01-10 01:10:17,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928405657] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:17,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302822930] [2025-01-10 01:10:17,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:17,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:17,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:17,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:10:17,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-10 01:10:17,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 01:10:17,130 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:10:17,130 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:17,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:17,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:10:17,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:17,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302822930] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:17,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:17,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-01-10 01:10:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243838733] [2025-01-10 01:10:17,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:17,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-10 01:10:17,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:17,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-10 01:10:17,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-01-10 01:10:17,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2025-01-10 01:10:17,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 351 flow. Second operand has 15 states, 15 states have (on average 29.733333333333334) internal successors, (446), 15 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:17,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:17,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2025-01-10 01:10:17,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:18,813 INFO L124 PetriNetUnfolderBase]: 10900/17958 cut-off events. [2025-01-10 01:10:18,814 INFO L125 PetriNetUnfolderBase]: For 8902/9071 co-relation queries the response was YES. [2025-01-10 01:10:18,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44027 conditions, 17958 events. 10900/17958 cut-off events. For 8902/9071 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 143169 event pairs, 5828 based on Foata normal form. 442/16375 useless extension candidates. Maximal degree in co-relation 20090. Up to 6746 conditions per place. [2025-01-10 01:10:18,934 INFO L140 encePairwiseOnDemand]: 63/77 looper letters, 136 selfloop transitions, 40 changer transitions 0/195 dead transitions. [2025-01-10 01:10:18,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 195 transitions, 1214 flow [2025-01-10 01:10:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:10:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:10:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 523 transitions. [2025-01-10 01:10:18,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5224775224775224 [2025-01-10 01:10:18,938 INFO L175 Difference]: Start difference. First operand has 94 places, 74 transitions, 351 flow. Second operand 13 states and 523 transitions. [2025-01-10 01:10:18,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 195 transitions, 1214 flow [2025-01-10 01:10:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 195 transitions, 1208 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:10:18,946 INFO L231 Difference]: Finished difference. Result has 111 places, 99 transitions, 651 flow [2025-01-10 01:10:18,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=651, PETRI_PLACES=111, PETRI_TRANSITIONS=99} [2025-01-10 01:10:18,947 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 33 predicate places. [2025-01-10 01:10:18,947 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 99 transitions, 651 flow [2025-01-10 01:10:18,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 29.733333333333334) internal successors, (446), 15 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:18,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:18,948 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:18,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:19,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:19,150 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:19,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash 781870027, now seen corresponding path program 2 times [2025-01-10 01:10:19,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:19,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485663910] [2025-01-10 01:10:19,152 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:19,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:19,158 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-10 01:10:19,169 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:10:19,170 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:19,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:19,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:19,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485663910] [2025-01-10 01:10:19,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485663910] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:19,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451850210] [2025-01-10 01:10:19,290 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:19,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:19,296 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:10:19,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-10 01:10:19,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-10 01:10:19,400 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:10:19,400 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:19,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:19,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:10:19,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:19,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:10:19,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451850210] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:19,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:19,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-01-10 01:10:19,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700773723] [2025-01-10 01:10:19,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:19,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:10:19,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:19,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:10:19,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:10:19,696 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:19,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 99 transitions, 651 flow. Second operand has 16 states, 16 states have (on average 27.0625) internal successors, (433), 16 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:19,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:19,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:19,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:23,572 INFO L124 PetriNetUnfolderBase]: 33379/49417 cut-off events. [2025-01-10 01:10:23,572 INFO L125 PetriNetUnfolderBase]: For 51179/52536 co-relation queries the response was YES. [2025-01-10 01:10:23,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138587 conditions, 49417 events. 33379/49417 cut-off events. For 51179/52536 co-relation queries the response was YES. Maximal size of possible extension queue 2339. Compared 386686 event pairs, 14700 based on Foata normal form. 474/44355 useless extension candidates. Maximal degree in co-relation 70266. Up to 16172 conditions per place. [2025-01-10 01:10:24,029 INFO L140 encePairwiseOnDemand]: 63/77 looper letters, 184 selfloop transitions, 51 changer transitions 0/250 dead transitions. [2025-01-10 01:10:24,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 250 transitions, 1716 flow [2025-01-10 01:10:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:10:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:10:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 499 transitions. [2025-01-10 01:10:24,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4985014985014985 [2025-01-10 01:10:24,034 INFO L175 Difference]: Start difference. First operand has 111 places, 99 transitions, 651 flow. Second operand 13 states and 499 transitions. [2025-01-10 01:10:24,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 250 transitions, 1716 flow [2025-01-10 01:10:24,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 250 transitions, 1675 flow, removed 14 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:24,105 INFO L231 Difference]: Finished difference. Result has 125 places, 111 transitions, 877 flow [2025-01-10 01:10:24,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=877, PETRI_PLACES=125, PETRI_TRANSITIONS=111} [2025-01-10 01:10:24,105 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 47 predicate places. [2025-01-10 01:10:24,105 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 111 transitions, 877 flow [2025-01-10 01:10:24,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 27.0625) internal successors, (433), 16 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:24,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:24,106 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:24,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 01:10:24,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:24,311 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:24,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash -920173864, now seen corresponding path program 1 times [2025-01-10 01:10:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:24,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983676646] [2025-01-10 01:10:24,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:24,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:24,318 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:10:24,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:10:24,323 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:24,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:24,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:24,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983676646] [2025-01-10 01:10:24,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983676646] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:24,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781900340] [2025-01-10 01:10:24,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:10:24,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:24,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:24,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:10:24,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-10 01:10:24,449 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 01:10:24,468 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 01:10:24,468 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:10:24,468 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:24,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:10:24,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:24,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:10:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781900340] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:24,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:24,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-01-10 01:10:24,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631603012] [2025-01-10 01:10:24,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:24,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-10 01:10:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:24,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-10 01:10:24,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-01-10 01:10:24,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2025-01-10 01:10:24,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 111 transitions, 877 flow. Second operand has 15 states, 15 states have (on average 29.866666666666667) internal successors, (448), 15 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:24,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:24,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2025-01-10 01:10:24,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:28,614 INFO L124 PetriNetUnfolderBase]: 30011/49228 cut-off events. [2025-01-10 01:10:28,614 INFO L125 PetriNetUnfolderBase]: For 66305/67079 co-relation queries the response was YES. [2025-01-10 01:10:28,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141787 conditions, 49228 events. 30011/49228 cut-off events. For 66305/67079 co-relation queries the response was YES. Maximal size of possible extension queue 2467. Compared 446697 event pairs, 18348 based on Foata normal form. 900/44918 useless extension candidates. Maximal degree in co-relation 125722. Up to 22922 conditions per place. [2025-01-10 01:10:29,088 INFO L140 encePairwiseOnDemand]: 65/77 looper letters, 191 selfloop transitions, 55 changer transitions 0/266 dead transitions. [2025-01-10 01:10:29,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 266 transitions, 2471 flow [2025-01-10 01:10:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:10:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:10:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 441 transitions. [2025-01-10 01:10:29,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5206611570247934 [2025-01-10 01:10:29,090 INFO L175 Difference]: Start difference. First operand has 125 places, 111 transitions, 877 flow. Second operand 11 states and 441 transitions. [2025-01-10 01:10:29,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 266 transitions, 2471 flow [2025-01-10 01:10:29,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 266 transitions, 2435 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:10:29,141 INFO L231 Difference]: Finished difference. Result has 140 places, 143 transitions, 1457 flow [2025-01-10 01:10:29,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1457, PETRI_PLACES=140, PETRI_TRANSITIONS=143} [2025-01-10 01:10:29,141 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 62 predicate places. [2025-01-10 01:10:29,141 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 143 transitions, 1457 flow [2025-01-10 01:10:29,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 29.866666666666667) internal successors, (448), 15 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:29,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:29,142 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:29,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:29,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:29,343 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:29,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash 970328700, now seen corresponding path program 3 times [2025-01-10 01:10:29,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:29,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783955967] [2025-01-10 01:10:29,343 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:10:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:29,351 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes. [2025-01-10 01:10:29,359 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 21 statements. [2025-01-10 01:10:29,359 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:10:29,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-10 01:10:29,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:29,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783955967] [2025-01-10 01:10:29,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783955967] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:29,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809410319] [2025-01-10 01:10:29,535 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:10:29,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:29,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:29,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:10:29,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-10 01:10:29,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes. [2025-01-10 01:10:29,673 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 21 statements. [2025-01-10 01:10:29,673 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:10:29,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:29,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:10:29,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-10 01:10:29,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:29,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2025-01-10 01:10:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-10 01:10:29,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809410319] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:29,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:29,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2025-01-10 01:10:29,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977037596] [2025-01-10 01:10:29,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:29,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-10 01:10:29,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:29,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-10 01:10:29,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2025-01-10 01:10:30,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:30,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 143 transitions, 1457 flow. Second operand has 22 states, 22 states have (on average 27.136363636363637) internal successors, (597), 22 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:30,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:30,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:30,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:38,293 INFO L124 PetriNetUnfolderBase]: 49175/70399 cut-off events. [2025-01-10 01:10:38,293 INFO L125 PetriNetUnfolderBase]: For 97347/97851 co-relation queries the response was YES. [2025-01-10 01:10:38,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221797 conditions, 70399 events. 49175/70399 cut-off events. For 97347/97851 co-relation queries the response was YES. Maximal size of possible extension queue 3456. Compared 553589 event pairs, 3687 based on Foata normal form. 0/64499 useless extension candidates. Maximal degree in co-relation 194848. Up to 23517 conditions per place. [2025-01-10 01:10:39,081 INFO L140 encePairwiseOnDemand]: 65/77 looper letters, 185 selfloop transitions, 52 changer transitions 0/252 dead transitions. [2025-01-10 01:10:39,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 252 transitions, 2441 flow [2025-01-10 01:10:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:10:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:10:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 402 transitions. [2025-01-10 01:10:39,083 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47461629279811096 [2025-01-10 01:10:39,083 INFO L175 Difference]: Start difference. First operand has 140 places, 143 transitions, 1457 flow. Second operand 11 states and 402 transitions. [2025-01-10 01:10:39,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 252 transitions, 2441 flow [2025-01-10 01:10:39,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 252 transitions, 2422 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-01-10 01:10:39,665 INFO L231 Difference]: Finished difference. Result has 148 places, 143 transitions, 1550 flow [2025-01-10 01:10:39,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1550, PETRI_PLACES=148, PETRI_TRANSITIONS=143} [2025-01-10 01:10:39,666 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 70 predicate places. [2025-01-10 01:10:39,666 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 143 transitions, 1550 flow [2025-01-10 01:10:39,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 27.136363636363637) internal successors, (597), 22 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:39,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:39,667 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:39,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-10 01:10:39,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-01-10 01:10:39,868 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:39,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1455742687, now seen corresponding path program 2 times [2025-01-10 01:10:39,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:39,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381664546] [2025-01-10 01:10:39,868 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:39,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:39,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-10 01:10:39,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-10 01:10:39,882 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:39,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:10:39,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:39,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381664546] [2025-01-10 01:10:39,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381664546] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:39,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242459485] [2025-01-10 01:10:39,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:10:39,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:39,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:39,977 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:10:39,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-10 01:10:40,031 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-10 01:10:40,054 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-10 01:10:40,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:10:40,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:40,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:10:40,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:10:40,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-10 01:10:40,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242459485] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:40,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:40,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-01-10 01:10:40,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798654905] [2025-01-10 01:10:40,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:40,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:10:40,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:40,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:10:40,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:10:40,369 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:40,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 143 transitions, 1550 flow. Second operand has 16 states, 16 states have (on average 27.3125) internal successors, (437), 16 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:40,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:40,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:40,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:10:46,916 INFO L124 PetriNetUnfolderBase]: 43310/65285 cut-off events. [2025-01-10 01:10:46,916 INFO L125 PetriNetUnfolderBase]: For 112118/113747 co-relation queries the response was YES. [2025-01-10 01:10:47,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200254 conditions, 65285 events. 43310/65285 cut-off events. For 112118/113747 co-relation queries the response was YES. Maximal size of possible extension queue 3245. Compared 551303 event pairs, 20036 based on Foata normal form. 916/61099 useless extension candidates. Maximal degree in co-relation 176397. Up to 24767 conditions per place. [2025-01-10 01:10:47,635 INFO L140 encePairwiseOnDemand]: 63/77 looper letters, 182 selfloop transitions, 76 changer transitions 0/275 dead transitions. [2025-01-10 01:10:47,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 275 transitions, 2654 flow [2025-01-10 01:10:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:10:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:10:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 483 transitions. [2025-01-10 01:10:47,637 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4825174825174825 [2025-01-10 01:10:47,637 INFO L175 Difference]: Start difference. First operand has 148 places, 143 transitions, 1550 flow. Second operand 13 states and 483 transitions. [2025-01-10 01:10:47,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 275 transitions, 2654 flow [2025-01-10 01:10:47,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 275 transitions, 2498 flow, removed 4 selfloop flow, removed 9 redundant places. [2025-01-10 01:10:47,899 INFO L231 Difference]: Finished difference. Result has 155 places, 148 transitions, 1679 flow [2025-01-10 01:10:47,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1679, PETRI_PLACES=155, PETRI_TRANSITIONS=148} [2025-01-10 01:10:47,900 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 77 predicate places. [2025-01-10 01:10:47,901 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 148 transitions, 1679 flow [2025-01-10 01:10:47,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 27.3125) internal successors, (437), 16 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:47,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:10:47,901 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:10:47,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 01:10:48,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-01-10 01:10:48,102 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-01-10 01:10:48,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:10:48,102 INFO L85 PathProgramCache]: Analyzing trace with hash -723017966, now seen corresponding path program 3 times [2025-01-10 01:10:48,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:10:48,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883747807] [2025-01-10 01:10:48,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:10:48,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:10:48,110 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-01-10 01:10:48,124 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 23 statements. [2025-01-10 01:10:48,124 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:10:48,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:10:48,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:10:48,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883747807] [2025-01-10 01:10:48,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883747807] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:10:48,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048217942] [2025-01-10 01:10:48,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:10:48,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:10:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:10:48,378 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:10:48,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-10 01:10:48,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-01-10 01:10:48,522 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 23 statements. [2025-01-10 01:10:48,522 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:10:48,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:10:48,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-10 01:10:48,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:10:48,547 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 [2025-01-10 01:10:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:10:48,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:10:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:10:49,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048217942] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:10:49,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:10:49,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-01-10 01:10:49,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411130486] [2025-01-10 01:10:49,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:10:49,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-10 01:10:49,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:10:49,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-10 01:10:49,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2025-01-10 01:10:49,771 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2025-01-10 01:10:49,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 148 transitions, 1679 flow. Second operand has 23 states, 23 states have (on average 27.47826086956522) internal successors, (632), 23 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:10:49,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:10:49,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2025-01-10 01:10:49,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand