./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:47:27,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:47:27,455 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:47:27,460 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:47:27,460 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:47:27,482 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:47:27,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:47:27,483 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:47:27,483 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:47:27,483 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:47:27,484 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:47:27,484 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:47:27,484 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:47:27,485 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:47:27,485 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:47:27,485 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:47:27,485 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:47:27,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:47:27,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:47:27,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:47:27,490 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:47:27,491 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:47:27,491 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:47:27,491 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:47:27,491 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:47:27,491 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:47:27,491 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:47:27,492 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:47:27,492 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:47:27,492 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:47:27,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:47:27,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:47:27,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:47:27,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:47:27,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:47:27,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:47:27,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:47:27,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:47:27,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:47:27,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:47:27,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:47:27,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:47:27,494 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 [2024-11-20 17:47:27,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:47:27,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:47:27,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:47:27,737 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:47:27,737 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:47:27,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2024-11-20 17:47:28,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:47:29,130 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:47:29,131 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2024-11-20 17:47:29,137 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af45ab9f7/3cce514f5be340df8cafa6f2d499b9a6/FLAG5af43bb49 [2024-11-20 17:47:29,149 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af45ab9f7/3cce514f5be340df8cafa6f2d499b9a6 [2024-11-20 17:47:29,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:47:29,151 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:47:29,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:47:29,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:47:29,158 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:47:29,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5046d8db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29, skipping insertion in model container [2024-11-20 17:47:29,159 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,178 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:47:29,321 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:47:29,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:47:29,328 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:47:29,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:47:29,360 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:47:29,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29 WrapperNode [2024-11-20 17:47:29,364 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:47:29,365 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:47:29,365 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:47:29,365 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:47:29,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,396 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 12, calls inlined = 18, statements flattened = 187 [2024-11-20 17:47:29,397 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:47:29,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:47:29,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:47:29,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:47:29,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,410 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,422 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 7 writes are split as follows [0, 7]. [2024-11-20 17:47:29,422 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,422 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,428 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,431 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,432 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,433 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,435 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:47:29,436 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:47:29,436 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:47:29,436 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:47:29,437 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (1/1) ... [2024-11-20 17:47:29,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:47:29,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:29,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:47:29,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:47:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:47:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:47:29,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:47:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:47:29,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:47:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:47:29,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:47:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:47:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:47:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:47:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:47:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:47:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:47:29,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:47:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:47:29,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:47:29,515 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:47:29,621 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:47:29,623 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:47:30,041 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:47:30,042 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:47:30,244 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:47:30,245 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-20 17:47:30,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:30 BoogieIcfgContainer [2024-11-20 17:47:30,245 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:47:30,248 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:47:30,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:47:30,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:47:30,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:47:29" (1/3) ... [2024-11-20 17:47:30,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aadc29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:30, skipping insertion in model container [2024-11-20 17:47:30,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:29" (2/3) ... [2024-11-20 17:47:30,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aadc29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:30, skipping insertion in model container [2024-11-20 17:47:30,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:30" (3/3) ... [2024-11-20 17:47:30,253 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-vector-add.wvr.c [2024-11-20 17:47:30,267 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:47:30,267 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-20 17:47:30,267 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:47:30,325 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:47:30,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 181 flow [2024-11-20 17:47:30,382 INFO L124 PetriNetUnfolderBase]: 7/77 cut-off events. [2024-11-20 17:47:30,383 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:47:30,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 7/77 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 214 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-11-20 17:47:30,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 80 transitions, 181 flow [2024-11-20 17:47:30,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 170 flow [2024-11-20 17:47:30,398 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:47:30,403 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;@7dcc9b69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:47:30,403 INFO L334 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2024-11-20 17:47:30,406 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:47:30,407 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:47:30,407 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:47:30,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:30,408 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:47:30,408 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:30,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:30,412 INFO L85 PathProgramCache]: Analyzing trace with hash 754811, now seen corresponding path program 1 times [2024-11-20 17:47:30,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:30,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978070409] [2024-11-20 17:47:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:30,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:30,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:30,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978070409] [2024-11-20 17:47:30,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978070409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:30,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:30,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:47:30,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652118797] [2024-11-20 17:47:30,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:30,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:47:30,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:30,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:47:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:47:30,770 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-20 17:47:30,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:30,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:30,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-20 17:47:30,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:30,926 INFO L124 PetriNetUnfolderBase]: 203/513 cut-off events. [2024-11-20 17:47:30,927 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-20 17:47:30,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 513 events. 203/513 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2754 event pairs, 124 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 732. Up to 294 conditions per place. [2024-11-20 17:47:30,933 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 31 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-11-20 17:47:30,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 224 flow [2024-11-20 17:47:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:47:30,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:47:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-11-20 17:47:30,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-11-20 17:47:30,945 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 170 flow. Second operand 3 states and 161 transitions. [2024-11-20 17:47:30,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 224 flow [2024-11-20 17:47:30,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 212 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:30,953 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 150 flow [2024-11-20 17:47:30,955 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-11-20 17:47:30,957 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, -10 predicate places. [2024-11-20 17:47:30,957 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 150 flow [2024-11-20 17:47:30,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:30,958 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:30,958 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:47:30,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:47:30,958 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:30,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash 754812, now seen corresponding path program 1 times [2024-11-20 17:47:30,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:30,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566676808] [2024-11-20 17:47:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:30,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:31,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:31,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566676808] [2024-11-20 17:47:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566676808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:31,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:31,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:47:31,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365248002] [2024-11-20 17:47:31,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:31,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:31,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:31,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:31,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-20 17:47:31,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-11-20 17:47:31,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:31,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-20 17:47:31,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:31,461 INFO L124 PetriNetUnfolderBase]: 203/512 cut-off events. [2024-11-20 17:47:31,461 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:31,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 838 conditions, 512 events. 203/512 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2748 event pairs, 124 based on Foata normal form. 0/373 useless extension candidates. Maximal degree in co-relation 801. Up to 306 conditions per place. [2024-11-20 17:47:31,467 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 32 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2024-11-20 17:47:31,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 220 flow [2024-11-20 17:47:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2024-11-20 17:47:31,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-11-20 17:47:31,470 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 150 flow. Second operand 4 states and 201 transitions. [2024-11-20 17:47:31,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 220 flow [2024-11-20 17:47:31,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:31,471 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 152 flow [2024-11-20 17:47:31,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-11-20 17:47:31,473 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, -10 predicate places. [2024-11-20 17:47:31,473 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 152 flow [2024-11-20 17:47:31,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-11-20 17:47:31,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:31,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:47:31,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:47:31,475 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:31,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash 23402669, now seen corresponding path program 1 times [2024-11-20 17:47:31,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:31,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928428872] [2024-11-20 17:47:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:31,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:31,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:31,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928428872] [2024-11-20 17:47:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928428872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:31,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:47:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113364502] [2024-11-20 17:47:31,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:31,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:31,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:31,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2024-11-20 17:47:31,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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) [2024-11-20 17:47:31,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:31,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2024-11-20 17:47:31,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:31,742 INFO L124 PetriNetUnfolderBase]: 207/530 cut-off events. [2024-11-20 17:47:31,742 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:31,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 530 events. 207/530 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2868 event pairs, 124 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 807. Up to 308 conditions per place. [2024-11-20 17:47:31,748 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 35 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-11-20 17:47:31,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 284 flow [2024-11-20 17:47:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-11-20 17:47:31,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.721875 [2024-11-20 17:47:31,750 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 152 flow. Second operand 4 states and 231 transitions. [2024-11-20 17:47:31,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 284 flow [2024-11-20 17:47:31,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 270 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:31,755 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 228 flow [2024-11-20 17:47:31,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-11-20 17:47:31,756 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, -8 predicate places. [2024-11-20 17:47:31,756 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 228 flow [2024-11-20 17:47:31,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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) [2024-11-20 17:47:31,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:31,756 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:47:31,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:47:31,756 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:31,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1012529321, now seen corresponding path program 1 times [2024-11-20 17:47:31,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:31,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81660001] [2024-11-20 17:47:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:31,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:31,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:31,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81660001] [2024-11-20 17:47:31,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81660001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:31,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259984628] [2024-11-20 17:47:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:31,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:31,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:31,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:31,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:47:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:31,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:47:31,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:32,040 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 [2024-11-20 17:47:32,157 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:47:32,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-20 17:47:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:32,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:32,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259984628] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:32,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:32,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-20 17:47:32,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338851694] [2024-11-20 17:47:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:32,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:47:32,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:32,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:47:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:47:32,347 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-20 17:47:32,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-11-20 17:47:32,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:32,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-20 17:47:32,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:32,525 INFO L124 PetriNetUnfolderBase]: 405/1025 cut-off events. [2024-11-20 17:47:32,525 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-20 17:47:32,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1711 conditions, 1025 events. 405/1025 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6558 event pairs, 248 based on Foata normal form. 3/770 useless extension candidates. Maximal degree in co-relation 811. Up to 310 conditions per place. [2024-11-20 17:47:32,531 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 62 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2024-11-20 17:47:32,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 443 flow [2024-11-20 17:47:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:32,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2024-11-20 17:47:32,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6975 [2024-11-20 17:47:32,533 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 228 flow. Second operand 5 states and 279 transitions. [2024-11-20 17:47:32,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 443 flow [2024-11-20 17:47:32,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:47:32,535 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 269 flow [2024-11-20 17:47:32,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-11-20 17:47:32,536 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2024-11-20 17:47:32,536 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 269 flow [2024-11-20 17:47:32,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-11-20 17:47:32,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:32,536 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:32,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:32,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:32,741 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:32,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:32,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1916873328, now seen corresponding path program 1 times [2024-11-20 17:47:32,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:32,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609764875] [2024-11-20 17:47:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:32,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:32,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:32,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609764875] [2024-11-20 17:47:32,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609764875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:32,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713961984] [2024-11-20 17:47:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:32,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:32,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:32,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:32,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:47:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:32,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:47:32,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:32,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:32,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713961984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:32,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:32,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:47:32,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208890569] [2024-11-20 17:47:32,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:32,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:47:32,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:32,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:47:32,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:47:33,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2024-11-20 17:47:33,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 269 flow. Second operand has 13 states, 13 states have (on average 46.53846153846154) internal successors, (605), 13 states have internal predecessors, (605), 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) [2024-11-20 17:47:33,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:33,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2024-11-20 17:47:33,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:33,375 INFO L124 PetriNetUnfolderBase]: 610/1548 cut-off events. [2024-11-20 17:47:33,375 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-20 17:47:33,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2626 conditions, 1548 events. 610/1548 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9505 event pairs, 372 based on Foata normal form. 3/1160 useless extension candidates. Maximal degree in co-relation 837. Up to 590 conditions per place. [2024-11-20 17:47:33,383 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 54 selfloop transitions, 39 changer transitions 0/129 dead transitions. [2024-11-20 17:47:33,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 649 flow [2024-11-20 17:47:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:47:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:47:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 500 transitions. [2024-11-20 17:47:33,384 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-11-20 17:47:33,384 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 269 flow. Second operand 9 states and 500 transitions. [2024-11-20 17:47:33,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 649 flow [2024-11-20 17:47:33,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 129 transitions, 647 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:47:33,387 INFO L231 Difference]: Finished difference. Result has 85 places, 102 transitions, 505 flow [2024-11-20 17:47:33,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=505, PETRI_PLACES=85, PETRI_TRANSITIONS=102} [2024-11-20 17:47:33,388 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 6 predicate places. [2024-11-20 17:47:33,388 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 102 transitions, 505 flow [2024-11-20 17:47:33,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 46.53846153846154) internal successors, (605), 13 states have internal predecessors, (605), 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) [2024-11-20 17:47:33,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:33,389 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:33,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:47:33,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:33,593 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:33,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:33,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1268851006, now seen corresponding path program 1 times [2024-11-20 17:47:33,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:33,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765375353] [2024-11-20 17:47:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:33,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:33,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:33,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765375353] [2024-11-20 17:47:33,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765375353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:33,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:33,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:47:33,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407418965] [2024-11-20 17:47:33,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:33,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:47:33,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:33,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:47:33,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:47:33,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:47:33,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 102 transitions, 505 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-11-20 17:47:33,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:33,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:47:33,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:33,902 INFO L124 PetriNetUnfolderBase]: 874/2142 cut-off events. [2024-11-20 17:47:33,903 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-20 17:47:33,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3718 conditions, 2142 events. 874/2142 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 13466 event pairs, 496 based on Foata normal form. 2/1588 useless extension candidates. Maximal degree in co-relation 1411. Up to 781 conditions per place. [2024-11-20 17:47:33,913 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 71 selfloop transitions, 27 changer transitions 1/134 dead transitions. [2024-11-20 17:47:33,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 134 transitions, 795 flow [2024-11-20 17:47:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:47:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:47:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 343 transitions. [2024-11-20 17:47:33,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7145833333333333 [2024-11-20 17:47:33,915 INFO L175 Difference]: Start difference. First operand has 85 places, 102 transitions, 505 flow. Second operand 6 states and 343 transitions. [2024-11-20 17:47:33,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 134 transitions, 795 flow [2024-11-20 17:47:33,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 134 transitions, 694 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:33,921 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 478 flow [2024-11-20 17:47:33,923 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-11-20 17:47:33,923 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 9 predicate places. [2024-11-20 17:47:33,924 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 478 flow [2024-11-20 17:47:33,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 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) [2024-11-20 17:47:33,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:33,924 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-20 17:47:33,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:47:33,924 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:33,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2096408692, now seen corresponding path program 2 times [2024-11-20 17:47:33,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:33,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009010932] [2024-11-20 17:47:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:33,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:34,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:34,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009010932] [2024-11-20 17:47:34,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009010932] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694517001] [2024-11-20 17:47:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:34,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:34,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:34,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:34,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:47:34,210 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:34,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:34,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 17:47:34,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:34,220 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 [2024-11-20 17:47:34,326 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:47:34,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-20 17:47:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:34,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:34,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694517001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:34,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:34,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-20 17:47:34,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017278325] [2024-11-20 17:47:34,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:34,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:47:34,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:47:34,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:47:35,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-20 17:47:35,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 478 flow. Second operand has 19 states, 19 states have (on average 42.578947368421055) internal successors, (809), 19 states have internal predecessors, (809), 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) [2024-11-20 17:47:35,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:35,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-20 17:47:35,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:36,556 INFO L124 PetriNetUnfolderBase]: 754/2084 cut-off events. [2024-11-20 17:47:36,556 INFO L125 PetriNetUnfolderBase]: For 471/495 co-relation queries the response was YES. [2024-11-20 17:47:36,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3864 conditions, 2084 events. 754/2084 cut-off events. For 471/495 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 14611 event pairs, 496 based on Foata normal form. 18/1538 useless extension candidates. Maximal degree in co-relation 1748. Up to 825 conditions per place. [2024-11-20 17:47:36,567 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 79 selfloop transitions, 40 changer transitions 0/152 dead transitions. [2024-11-20 17:47:36,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 152 transitions, 950 flow [2024-11-20 17:47:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:47:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:47:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 626 transitions. [2024-11-20 17:47:36,571 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6520833333333333 [2024-11-20 17:47:36,571 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 478 flow. Second operand 12 states and 626 transitions. [2024-11-20 17:47:36,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 152 transitions, 950 flow [2024-11-20 17:47:36,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:36,576 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 623 flow [2024-11-20 17:47:36,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=623, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-11-20 17:47:36,577 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2024-11-20 17:47:36,577 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 623 flow [2024-11-20 17:47:36,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 42.578947368421055) internal successors, (809), 19 states have internal predecessors, (809), 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) [2024-11-20 17:47:36,578 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:36,578 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:36,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:47:36,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:36,779 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:36,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash 368255388, now seen corresponding path program 1 times [2024-11-20 17:47:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:36,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511910447] [2024-11-20 17:47:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:36,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:36,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511910447] [2024-11-20 17:47:36,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511910447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:36,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:36,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:47:36,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963312527] [2024-11-20 17:47:36,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:36,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:47:36,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:47:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:47:36,901 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:47:36,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 623 flow. Second operand has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 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) [2024-11-20 17:47:36,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:36,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:47:36,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:37,176 INFO L124 PetriNetUnfolderBase]: 826/2108 cut-off events. [2024-11-20 17:47:37,176 INFO L125 PetriNetUnfolderBase]: For 591/653 co-relation queries the response was YES. [2024-11-20 17:47:37,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4080 conditions, 2108 events. 826/2108 cut-off events. For 591/653 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13930 event pairs, 496 based on Foata normal form. 0/1558 useless extension candidates. Maximal degree in co-relation 3995. Up to 808 conditions per place. [2024-11-20 17:47:37,184 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 73 selfloop transitions, 28 changer transitions 3/139 dead transitions. [2024-11-20 17:47:37,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 139 transitions, 917 flow [2024-11-20 17:47:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:47:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:47:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2024-11-20 17:47:37,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.70625 [2024-11-20 17:47:37,185 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 623 flow. Second operand 6 states and 339 transitions. [2024-11-20 17:47:37,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 139 transitions, 917 flow [2024-11-20 17:47:37,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 139 transitions, 884 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:37,189 INFO L231 Difference]: Finished difference. Result has 104 places, 115 transitions, 663 flow [2024-11-20 17:47:37,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=663, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2024-11-20 17:47:37,190 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2024-11-20 17:47:37,190 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 663 flow [2024-11-20 17:47:37,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 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) [2024-11-20 17:47:37,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:37,190 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-20 17:47:37,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:47:37,191 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:37,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -309065805, now seen corresponding path program 3 times [2024-11-20 17:47:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097460465] [2024-11-20 17:47:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:37,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097460465] [2024-11-20 17:47:37,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097460465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720748183] [2024-11-20 17:47:37,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:47:37,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:37,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:37,280 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:37,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:47:37,335 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:47:37,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:37,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:47:37,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:37,351 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 [2024-11-20 17:47:37,435 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:47:37,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-20 17:47:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:37,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:37,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720748183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:37,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-20 17:47:37,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494164306] [2024-11-20 17:47:37,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:37,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:47:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:47:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:47:38,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-20 17:47:38,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 663 flow. Second operand has 18 states, 18 states have (on average 42.77777777777778) internal successors, (770), 18 states have internal predecessors, (770), 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) [2024-11-20 17:47:38,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:38,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-20 17:47:38,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:39,438 INFO L124 PetriNetUnfolderBase]: 552/1767 cut-off events. [2024-11-20 17:47:39,438 INFO L125 PetriNetUnfolderBase]: For 619/651 co-relation queries the response was YES. [2024-11-20 17:47:39,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3442 conditions, 1767 events. 552/1767 cut-off events. For 619/651 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12890 event pairs, 372 based on Foata normal form. 12/1237 useless extension candidates. Maximal degree in co-relation 3279. Up to 826 conditions per place. [2024-11-20 17:47:39,444 INFO L140 encePairwiseOnDemand]: 64/80 looper letters, 35 selfloop transitions, 59 changer transitions 0/127 dead transitions. [2024-11-20 17:47:39,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 127 transitions, 934 flow [2024-11-20 17:47:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 17:47:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 17:47:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 840 transitions. [2024-11-20 17:47:39,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-20 17:47:39,447 INFO L175 Difference]: Start difference. First operand has 104 places, 115 transitions, 663 flow. Second operand 18 states and 840 transitions. [2024-11-20 17:47:39,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 127 transitions, 934 flow [2024-11-20 17:47:39,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 127 transitions, 835 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-20 17:47:39,451 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 744 flow [2024-11-20 17:47:39,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=744, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2024-11-20 17:47:39,452 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 34 predicate places. [2024-11-20 17:47:39,452 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 744 flow [2024-11-20 17:47:39,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 42.77777777777778) internal successors, (770), 18 states have internal predecessors, (770), 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) [2024-11-20 17:47:39,452 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:39,453 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:39,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:47:39,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:39,657 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:39,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1690234397, now seen corresponding path program 1 times [2024-11-20 17:47:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:39,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810570903] [2024-11-20 17:47:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:39,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:39,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:39,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810570903] [2024-11-20 17:47:39,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810570903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:39,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:39,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:47:39,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777451683] [2024-11-20 17:47:39,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:39,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:47:39,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:39,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:47:39,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:47:39,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:47:39,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 744 flow. Second operand has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 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) [2024-11-20 17:47:39,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:39,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:47:39,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:39,957 INFO L124 PetriNetUnfolderBase]: 634/1461 cut-off events. [2024-11-20 17:47:39,957 INFO L125 PetriNetUnfolderBase]: For 696/804 co-relation queries the response was YES. [2024-11-20 17:47:39,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1461 events. 634/1461 cut-off events. For 696/804 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 8186 event pairs, 411 based on Foata normal form. 0/1095 useless extension candidates. Maximal degree in co-relation 1866. Up to 777 conditions per place. [2024-11-20 17:47:39,965 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 59 selfloop transitions, 22 changer transitions 26/139 dead transitions. [2024-11-20 17:47:39,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 139 transitions, 1018 flow [2024-11-20 17:47:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:47:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:47:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 333 transitions. [2024-11-20 17:47:39,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.69375 [2024-11-20 17:47:39,966 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 744 flow. Second operand 6 states and 333 transitions. [2024-11-20 17:47:39,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 139 transitions, 1018 flow [2024-11-20 17:47:39,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 139 transitions, 799 flow, removed 28 selfloop flow, removed 14 redundant places. [2024-11-20 17:47:39,970 INFO L231 Difference]: Finished difference. Result has 106 places, 113 transitions, 526 flow [2024-11-20 17:47:39,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=106, PETRI_TRANSITIONS=113} [2024-11-20 17:47:39,971 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 27 predicate places. [2024-11-20 17:47:39,972 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 113 transitions, 526 flow [2024-11-20 17:47:39,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 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) [2024-11-20 17:47:39,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:39,972 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:39,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 17:47:39,972 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:39,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:39,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1778551803, now seen corresponding path program 1 times [2024-11-20 17:47:39,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:39,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832153775] [2024-11-20 17:47:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:39,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:40,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:40,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832153775] [2024-11-20 17:47:40,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832153775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:40,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:40,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:47:40,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544229613] [2024-11-20 17:47:40,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:40,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:47:40,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:40,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:47:40,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:47:40,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2024-11-20 17:47:40,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 526 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 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) [2024-11-20 17:47:40,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:40,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2024-11-20 17:47:40,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:40,388 INFO L124 PetriNetUnfolderBase]: 866/1682 cut-off events. [2024-11-20 17:47:40,388 INFO L125 PetriNetUnfolderBase]: For 500/652 co-relation queries the response was YES. [2024-11-20 17:47:40,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3758 conditions, 1682 events. 866/1682 cut-off events. For 500/652 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 9336 event pairs, 612 based on Foata normal form. 0/1434 useless extension candidates. Maximal degree in co-relation 2097. Up to 1244 conditions per place. [2024-11-20 17:47:40,395 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 75 selfloop transitions, 8 changer transitions 0/110 dead transitions. [2024-11-20 17:47:40,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 686 flow [2024-11-20 17:47:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-11-20 17:47:40,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-11-20 17:47:40,396 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 526 flow. Second operand 5 states and 214 transitions. [2024-11-20 17:47:40,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 686 flow [2024-11-20 17:47:40,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 110 transitions, 608 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-11-20 17:47:40,400 INFO L231 Difference]: Finished difference. Result has 89 places, 110 transitions, 458 flow [2024-11-20 17:47:40,401 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=458, PETRI_PLACES=89, PETRI_TRANSITIONS=110} [2024-11-20 17:47:40,401 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 10 predicate places. [2024-11-20 17:47:40,401 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 110 transitions, 458 flow [2024-11-20 17:47:40,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 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) [2024-11-20 17:47:40,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:40,401 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:40,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:47:40,402 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:40,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1778551802, now seen corresponding path program 1 times [2024-11-20 17:47:40,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:40,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427582143] [2024-11-20 17:47:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:40,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:40,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:40,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427582143] [2024-11-20 17:47:40,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427582143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:40,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630675735] [2024-11-20 17:47:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:40,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:40,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:40,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:47:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:40,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-20 17:47:40,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:40,820 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 [2024-11-20 17:47:40,850 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:47:40,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 17:47:40,926 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-20 17:47:40,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-20 17:47:40,987 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-20 17:47:40,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-20 17:47:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:41,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:41,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630675735] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:41,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 16 [2024-11-20 17:47:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191964538] [2024-11-20 17:47:41,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:41,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:47:41,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:41,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:47:41,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:47:41,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-20 17:47:41,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 110 transitions, 458 flow. Second operand has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 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) [2024-11-20 17:47:41,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:41,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-20 17:47:41,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:42,388 INFO L124 PetriNetUnfolderBase]: 812/1986 cut-off events. [2024-11-20 17:47:42,388 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-11-20 17:47:42,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3396 conditions, 1986 events. 812/1986 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13489 event pairs, 338 based on Foata normal form. 0/1484 useless extension candidates. Maximal degree in co-relation 1572. Up to 758 conditions per place. [2024-11-20 17:47:42,395 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 80 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-11-20 17:47:42,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 676 flow [2024-11-20 17:47:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2024-11-20 17:47:42,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-11-20 17:47:42,397 INFO L175 Difference]: Start difference. First operand has 89 places, 110 transitions, 458 flow. Second operand 7 states and 352 transitions. [2024-11-20 17:47:42,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 676 flow [2024-11-20 17:47:42,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 664 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:42,399 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 498 flow [2024-11-20 17:47:42,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=498, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2024-11-20 17:47:42,401 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 15 predicate places. [2024-11-20 17:47:42,401 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 498 flow [2024-11-20 17:47:42,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 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) [2024-11-20 17:47:42,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:42,401 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:42,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:47:42,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-20 17:47:42,602 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:42,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:42,602 INFO L85 PathProgramCache]: Analyzing trace with hash 699469704, now seen corresponding path program 1 times [2024-11-20 17:47:42,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:42,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115364589] [2024-11-20 17:47:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:42,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:42,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115364589] [2024-11-20 17:47:42,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115364589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984857704] [2024-11-20 17:47:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:42,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:42,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:42,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:42,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:47:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:42,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-20 17:47:42,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:42,901 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 10 treesize of output 9 [2024-11-20 17:47:42,948 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:47:42,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-20 17:47:43,014 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-20 17:47:43,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-20 17:47:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:43,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:43,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984857704] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:43,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:43,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 16 [2024-11-20 17:47:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996656216] [2024-11-20 17:47:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:43,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:47:43,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:43,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:47:43,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:47:43,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-20 17:47:43,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 498 flow. Second operand has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 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) [2024-11-20 17:47:43,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:43,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-20 17:47:43,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:43,966 INFO L124 PetriNetUnfolderBase]: 812/1940 cut-off events. [2024-11-20 17:47:43,966 INFO L125 PetriNetUnfolderBase]: For 310/402 co-relation queries the response was YES. [2024-11-20 17:47:43,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3781 conditions, 1940 events. 812/1940 cut-off events. For 310/402 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12843 event pairs, 338 based on Foata normal form. 46/1600 useless extension candidates. Maximal degree in co-relation 1761. Up to 758 conditions per place. [2024-11-20 17:47:43,972 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 81 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2024-11-20 17:47:43,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 124 transitions, 714 flow [2024-11-20 17:47:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2024-11-20 17:47:43,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-11-20 17:47:43,973 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 498 flow. Second operand 7 states and 352 transitions. [2024-11-20 17:47:43,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 124 transitions, 714 flow [2024-11-20 17:47:43,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 124 transitions, 702 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:43,976 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 532 flow [2024-11-20 17:47:43,976 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=532, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2024-11-20 17:47:43,976 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 20 predicate places. [2024-11-20 17:47:43,976 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 532 flow [2024-11-20 17:47:43,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 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) [2024-11-20 17:47:43,977 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:43,977 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:43,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:44,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:44,181 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:44,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash 699469703, now seen corresponding path program 1 times [2024-11-20 17:47:44,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:44,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404608654] [2024-11-20 17:47:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:44,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:44,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404608654] [2024-11-20 17:47:44,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404608654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:44,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:44,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:47:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314360853] [2024-11-20 17:47:44,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:44,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:47:44,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:47:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:47:44,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2024-11-20 17:47:44,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 532 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 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) [2024-11-20 17:47:44,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:44,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2024-11-20 17:47:44,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:44,518 INFO L124 PetriNetUnfolderBase]: 1146/2330 cut-off events. [2024-11-20 17:47:44,518 INFO L125 PetriNetUnfolderBase]: For 3076/3218 co-relation queries the response was YES. [2024-11-20 17:47:44,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5675 conditions, 2330 events. 1146/2330 cut-off events. For 3076/3218 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14732 event pairs, 772 based on Foata normal form. 148/2241 useless extension candidates. Maximal degree in co-relation 2705. Up to 1608 conditions per place. [2024-11-20 17:47:44,528 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 76 selfloop transitions, 9 changer transitions 0/110 dead transitions. [2024-11-20 17:47:44,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 696 flow [2024-11-20 17:47:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-11-20 17:47:44,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-11-20 17:47:44,529 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 532 flow. Second operand 5 states and 214 transitions. [2024-11-20 17:47:44,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 696 flow [2024-11-20 17:47:44,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 110 transitions, 676 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:47:44,562 INFO L231 Difference]: Finished difference. Result has 95 places, 110 transitions, 524 flow [2024-11-20 17:47:44,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=95, PETRI_TRANSITIONS=110} [2024-11-20 17:47:44,562 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 16 predicate places. [2024-11-20 17:47:44,563 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 110 transitions, 524 flow [2024-11-20 17:47:44,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 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) [2024-11-20 17:47:44,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:44,563 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:44,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 17:47:44,563 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:44,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash 208725064, now seen corresponding path program 1 times [2024-11-20 17:47:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:44,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512291593] [2024-11-20 17:47:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:44,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:44,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:44,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512291593] [2024-11-20 17:47:44,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512291593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:44,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082379607] [2024-11-20 17:47:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:44,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:44,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:44,707 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:44,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:47:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:44,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-20 17:47:44,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:44,784 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 [2024-11-20 17:47:44,824 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:47:44,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-20 17:47:44,886 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-20 17:47:44,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-20 17:47:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:45,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:45,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082379607] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:45,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:45,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 15 [2024-11-20 17:47:45,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551174836] [2024-11-20 17:47:45,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:45,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:47:45,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:45,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:47:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:47:45,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:47:45,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 110 transitions, 524 flow. Second operand has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 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) [2024-11-20 17:47:45,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:45,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:47:45,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:45,583 INFO L124 PetriNetUnfolderBase]: 694/1666 cut-off events. [2024-11-20 17:47:45,583 INFO L125 PetriNetUnfolderBase]: For 1088/1176 co-relation queries the response was YES. [2024-11-20 17:47:45,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3864 conditions, 1666 events. 694/1666 cut-off events. For 1088/1176 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 10635 event pairs, 338 based on Foata normal form. 94/1521 useless extension candidates. Maximal degree in co-relation 1799. Up to 810 conditions per place. [2024-11-20 17:47:45,591 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 78 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2024-11-20 17:47:45,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 122 transitions, 745 flow [2024-11-20 17:47:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:47:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:47:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 402 transitions. [2024-11-20 17:47:45,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-11-20 17:47:45,594 INFO L175 Difference]: Start difference. First operand has 95 places, 110 transitions, 524 flow. Second operand 8 states and 402 transitions. [2024-11-20 17:47:45,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 122 transitions, 745 flow [2024-11-20 17:47:45,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 122 transitions, 731 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:45,599 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 558 flow [2024-11-20 17:47:45,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=558, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-11-20 17:47:45,600 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2024-11-20 17:47:45,601 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 558 flow [2024-11-20 17:47:45,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 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) [2024-11-20 17:47:45,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:45,601 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:45,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:45,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:45,806 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:45,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash 208725063, now seen corresponding path program 1 times [2024-11-20 17:47:45,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:45,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889272622] [2024-11-20 17:47:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:45,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:45,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889272622] [2024-11-20 17:47:45,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889272622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:45,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:45,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:47:45,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893265453] [2024-11-20 17:47:45,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:45,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:47:45,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:47:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:47:45,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 80 [2024-11-20 17:47:45,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 558 flow. Second operand has 5 states, 5 states have (on average 41.2) internal successors, (206), 5 states have internal predecessors, (206), 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) [2024-11-20 17:47:45,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:45,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 80 [2024-11-20 17:47:45,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:46,090 INFO L124 PetriNetUnfolderBase]: 576/1292 cut-off events. [2024-11-20 17:47:46,091 INFO L125 PetriNetUnfolderBase]: For 3118/3456 co-relation queries the response was YES. [2024-11-20 17:47:46,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3537 conditions, 1292 events. 576/1292 cut-off events. For 3118/3456 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7390 event pairs, 338 based on Foata normal form. 88/1152 useless extension candidates. Maximal degree in co-relation 1632. Up to 812 conditions per place. [2024-11-20 17:47:46,097 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 74 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2024-11-20 17:47:46,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 109 transitions, 720 flow [2024-11-20 17:47:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-20 17:47:46,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-11-20 17:47:46,099 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 558 flow. Second operand 5 states and 226 transitions. [2024-11-20 17:47:46,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 109 transitions, 720 flow [2024-11-20 17:47:46,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 109 transitions, 690 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:46,101 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 542 flow [2024-11-20 17:47:46,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2024-11-20 17:47:46,102 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 17 predicate places. [2024-11-20 17:47:46,102 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 542 flow [2024-11-20 17:47:46,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 5 states have internal predecessors, (206), 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) [2024-11-20 17:47:46,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:46,102 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:46,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 17:47:46,103 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:46,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash 172061216, now seen corresponding path program 1 times [2024-11-20 17:47:46,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:46,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218634273] [2024-11-20 17:47:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:46,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:46,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218634273] [2024-11-20 17:47:46,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218634273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655191772] [2024-11-20 17:47:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:46,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:46,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:46,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:46,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:47:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:46,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-20 17:47:46,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:46,472 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 [2024-11-20 17:47:46,504 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:47:46,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 17:47:46,577 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-20 17:47:46,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-20 17:47:46,642 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-20 17:47:46,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-20 17:47:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:46,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:47,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655191772] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:47,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:47,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 16 [2024-11-20 17:47:47,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406950028] [2024-11-20 17:47:47,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:47,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:47:47,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:47:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:47:47,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-20 17:47:47,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 542 flow. Second operand has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 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) [2024-11-20 17:47:47,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:47,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-20 17:47:47,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:47,608 INFO L124 PetriNetUnfolderBase]: 1186/2638 cut-off events. [2024-11-20 17:47:47,609 INFO L125 PetriNetUnfolderBase]: For 3872/4524 co-relation queries the response was YES. [2024-11-20 17:47:47,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6636 conditions, 2638 events. 1186/2638 cut-off events. For 3872/4524 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18457 event pairs, 436 based on Foata normal form. 0/2216 useless extension candidates. Maximal degree in co-relation 3183. Up to 1060 conditions per place. [2024-11-20 17:47:47,618 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 83 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-11-20 17:47:47,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 123 transitions, 802 flow [2024-11-20 17:47:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2024-11-20 17:47:47,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6267857142857143 [2024-11-20 17:47:47,619 INFO L175 Difference]: Start difference. First operand has 96 places, 109 transitions, 542 flow. Second operand 7 states and 351 transitions. [2024-11-20 17:47:47,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 123 transitions, 802 flow [2024-11-20 17:47:47,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 123 transitions, 788 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:47,622 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 580 flow [2024-11-20 17:47:47,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=580, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-11-20 17:47:47,622 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 22 predicate places. [2024-11-20 17:47:47,622 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 580 flow [2024-11-20 17:47:47,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 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) [2024-11-20 17:47:47,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:47,623 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:47,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:47:47,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 17:47:47,824 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:47,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1038931130, now seen corresponding path program 1 times [2024-11-20 17:47:47,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:47,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855244550] [2024-11-20 17:47:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:47,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:48,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855244550] [2024-11-20 17:47:48,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855244550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075024579] [2024-11-20 17:47:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:48,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:48,023 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:48,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:47:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:48,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-20 17:47:48,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:48,096 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 [2024-11-20 17:47:48,135 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:47:48,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-20 17:47:48,181 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-20 17:47:48,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-20 17:47:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:48,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:48,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075024579] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:48,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:48,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 16 [2024-11-20 17:47:48,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827708465] [2024-11-20 17:47:48,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:48,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:47:48,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:47:48,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:47:48,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-20 17:47:48,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 580 flow. Second operand has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 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) [2024-11-20 17:47:48,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:48,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-20 17:47:48,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:49,046 INFO L124 PetriNetUnfolderBase]: 1186/2600 cut-off events. [2024-11-20 17:47:49,046 INFO L125 PetriNetUnfolderBase]: For 4313/5069 co-relation queries the response was YES. [2024-11-20 17:47:49,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7174 conditions, 2600 events. 1186/2600 cut-off events. For 4313/5069 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17829 event pairs, 436 based on Foata normal form. 46/2278 useless extension candidates. Maximal degree in co-relation 3449. Up to 1060 conditions per place. [2024-11-20 17:47:49,059 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 84 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2024-11-20 17:47:49,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 124 transitions, 838 flow [2024-11-20 17:47:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2024-11-20 17:47:49,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6267857142857143 [2024-11-20 17:47:49,063 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 580 flow. Second operand 7 states and 351 transitions. [2024-11-20 17:47:49,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 124 transitions, 838 flow [2024-11-20 17:47:49,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 124 transitions, 820 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:49,067 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 608 flow [2024-11-20 17:47:49,068 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=608, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2024-11-20 17:47:49,068 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 26 predicate places. [2024-11-20 17:47:49,068 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 608 flow [2024-11-20 17:47:49,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 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) [2024-11-20 17:47:49,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:49,069 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:49,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:49,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 17:47:49,273 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:49,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:49,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1278650707, now seen corresponding path program 1 times [2024-11-20 17:47:49,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:49,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745198036] [2024-11-20 17:47:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:49,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:49,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745198036] [2024-11-20 17:47:49,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745198036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200075827] [2024-11-20 17:47:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:49,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:49,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:49,352 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:49,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:47:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:49,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:49,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:49,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:49,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200075827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:49,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:49,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:47:49,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689010898] [2024-11-20 17:47:49,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:49,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:47:49,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:49,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:47:49,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:47:49,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:47:49,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 608 flow. Second operand has 14 states, 14 states have (on average 46.357142857142854) internal successors, (649), 14 states have internal predecessors, (649), 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) [2024-11-20 17:47:49,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:49,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:47:49,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:49,881 INFO L124 PetriNetUnfolderBase]: 964/2044 cut-off events. [2024-11-20 17:47:49,881 INFO L125 PetriNetUnfolderBase]: For 5088/5536 co-relation queries the response was YES. [2024-11-20 17:47:49,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6202 conditions, 2044 events. 964/2044 cut-off events. For 5088/5536 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12694 event pairs, 468 based on Foata normal form. 34/1826 useless extension candidates. Maximal degree in co-relation 3341. Up to 771 conditions per place. [2024-11-20 17:47:49,892 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 84 selfloop transitions, 50 changer transitions 0/162 dead transitions. [2024-11-20 17:47:49,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 162 transitions, 1114 flow [2024-11-20 17:47:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:47:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:47:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 545 transitions. [2024-11-20 17:47:49,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-11-20 17:47:49,893 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 608 flow. Second operand 10 states and 545 transitions. [2024-11-20 17:47:49,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 162 transitions, 1114 flow [2024-11-20 17:47:49,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 162 transitions, 1085 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:47:49,898 INFO L231 Difference]: Finished difference. Result has 112 places, 116 transitions, 741 flow [2024-11-20 17:47:49,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=741, PETRI_PLACES=112, PETRI_TRANSITIONS=116} [2024-11-20 17:47:49,899 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 33 predicate places. [2024-11-20 17:47:49,899 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 116 transitions, 741 flow [2024-11-20 17:47:49,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.357142857142854) internal successors, (649), 14 states have internal predecessors, (649), 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) [2024-11-20 17:47:49,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:49,899 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:49,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 17:47:50,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:50,104 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:50,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:50,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2142094690, now seen corresponding path program 1 times [2024-11-20 17:47:50,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:50,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963483236] [2024-11-20 17:47:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:50,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:50,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:50,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963483236] [2024-11-20 17:47:50,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963483236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:50,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536380938] [2024-11-20 17:47:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:50,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:50,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:50,227 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:50,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:47:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:50,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 17:47:50,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:50,307 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 [2024-11-20 17:47:50,322 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 15 treesize of output 11 [2024-11-20 17:47:50,342 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 [2024-11-20 17:47:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:50,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:50,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536380938] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:50,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:50,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2024-11-20 17:47:50,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268567407] [2024-11-20 17:47:50,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:50,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:47:50,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:50,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:47:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:47:50,665 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:47:50,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 116 transitions, 741 flow. Second operand has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 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) [2024-11-20 17:47:50,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:50,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:47:50,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:50,881 INFO L124 PetriNetUnfolderBase]: 964/2309 cut-off events. [2024-11-20 17:47:50,881 INFO L125 PetriNetUnfolderBase]: For 5861/6223 co-relation queries the response was YES. [2024-11-20 17:47:50,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7473 conditions, 2309 events. 964/2309 cut-off events. For 5861/6223 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 16169 event pairs, 468 based on Foata normal form. 110/2212 useless extension candidates. Maximal degree in co-relation 4600. Up to 1096 conditions per place. [2024-11-20 17:47:50,893 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 93 selfloop transitions, 12 changer transitions 0/133 dead transitions. [2024-11-20 17:47:50,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 133 transitions, 1078 flow [2024-11-20 17:47:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 357 transitions. [2024-11-20 17:47:50,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-11-20 17:47:50,895 INFO L175 Difference]: Start difference. First operand has 112 places, 116 transitions, 741 flow. Second operand 7 states and 357 transitions. [2024-11-20 17:47:50,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 133 transitions, 1078 flow [2024-11-20 17:47:50,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 133 transitions, 983 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:50,902 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 688 flow [2024-11-20 17:47:50,902 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=688, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-11-20 17:47:50,903 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 34 predicate places. [2024-11-20 17:47:50,903 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 688 flow [2024-11-20 17:47:50,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 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) [2024-11-20 17:47:50,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:50,903 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:50,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 17:47:51,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:51,104 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:51,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2142094689, now seen corresponding path program 1 times [2024-11-20 17:47:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:51,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988454650] [2024-11-20 17:47:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:51,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:51,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988454650] [2024-11-20 17:47:51,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988454650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:51,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:51,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:47:51,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810338568] [2024-11-20 17:47:51,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:51,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:51,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:51,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 80 [2024-11-20 17:47:51,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 688 flow. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 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) [2024-11-20 17:47:51,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:51,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 80 [2024-11-20 17:47:51,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:51,332 INFO L124 PetriNetUnfolderBase]: 792/1805 cut-off events. [2024-11-20 17:47:51,332 INFO L125 PetriNetUnfolderBase]: For 6733/7116 co-relation queries the response was YES. [2024-11-20 17:47:51,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6625 conditions, 1805 events. 792/1805 cut-off events. For 6733/7116 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11472 event pairs, 468 based on Foata normal form. 72/1698 useless extension candidates. Maximal degree in co-relation 4112. Up to 1096 conditions per place. [2024-11-20 17:47:51,339 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 83 selfloop transitions, 5 changer transitions 0/114 dead transitions. [2024-11-20 17:47:51,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 858 flow [2024-11-20 17:47:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-11-20 17:47:51,340 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-11-20 17:47:51,340 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 688 flow. Second operand 4 states and 188 transitions. [2024-11-20 17:47:51,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 858 flow [2024-11-20 17:47:51,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 114 transitions, 832 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:51,345 INFO L231 Difference]: Finished difference. Result has 107 places, 114 transitions, 666 flow [2024-11-20 17:47:51,345 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=666, PETRI_PLACES=107, PETRI_TRANSITIONS=114} [2024-11-20 17:47:51,346 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 28 predicate places. [2024-11-20 17:47:51,346 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 114 transitions, 666 flow [2024-11-20 17:47:51,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 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) [2024-11-20 17:47:51,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:51,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:51,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-20 17:47:51,346 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:51,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2126195169, now seen corresponding path program 1 times [2024-11-20 17:47:51,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:51,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347475254] [2024-11-20 17:47:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:51,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:51,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347475254] [2024-11-20 17:47:51,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347475254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:51,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:51,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-20 17:47:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373952122] [2024-11-20 17:47:51,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:51,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:47:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:47:51,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:47:52,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-11-20 17:47:52,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 114 transitions, 666 flow. Second operand has 10 states, 10 states have (on average 35.1) internal successors, (351), 10 states have internal predecessors, (351), 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) [2024-11-20 17:47:52,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:52,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-11-20 17:47:52,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:52,448 INFO L124 PetriNetUnfolderBase]: 2292/4038 cut-off events. [2024-11-20 17:47:52,449 INFO L125 PetriNetUnfolderBase]: For 14035/14688 co-relation queries the response was YES. [2024-11-20 17:47:52,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14336 conditions, 4038 events. 2292/4038 cut-off events. For 14035/14688 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 24827 event pairs, 708 based on Foata normal form. 0/3712 useless extension candidates. Maximal degree in co-relation 7838. Up to 1418 conditions per place. [2024-11-20 17:47:52,499 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 124 selfloop transitions, 12 changer transitions 0/155 dead transitions. [2024-11-20 17:47:52,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 155 transitions, 1276 flow [2024-11-20 17:47:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 291 transitions. [2024-11-20 17:47:52,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5196428571428572 [2024-11-20 17:47:52,501 INFO L175 Difference]: Start difference. First operand has 107 places, 114 transitions, 666 flow. Second operand 7 states and 291 transitions. [2024-11-20 17:47:52,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 155 transitions, 1276 flow [2024-11-20 17:47:52,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 155 transitions, 1270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:52,510 INFO L231 Difference]: Finished difference. Result has 110 places, 113 transitions, 682 flow [2024-11-20 17:47:52,511 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=110, PETRI_TRANSITIONS=113} [2024-11-20 17:47:52,511 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2024-11-20 17:47:52,511 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 113 transitions, 682 flow [2024-11-20 17:47:52,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 35.1) internal successors, (351), 10 states have internal predecessors, (351), 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) [2024-11-20 17:47:52,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:52,512 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:52,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-20 17:47:52,512 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:52,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:52,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1487541541, now seen corresponding path program 1 times [2024-11-20 17:47:52,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:52,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649744539] [2024-11-20 17:47:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:52,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:52,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649744539] [2024-11-20 17:47:52,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649744539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318121436] [2024-11-20 17:47:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:52,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:52,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:52,827 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:52,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:47:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:52,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-20 17:47:52,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:52,923 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 [2024-11-20 17:47:52,989 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:47:52,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-20 17:47:53,045 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-20 17:47:53,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-20 17:47:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:53,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318121436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:53,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:53,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 26 [2024-11-20 17:47:53,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913405522] [2024-11-20 17:47:53,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:53,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:47:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:53,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:47:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:47:55,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 80 [2024-11-20 17:47:55,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 113 transitions, 682 flow. Second operand has 28 states, 28 states have (on average 34.25) internal successors, (959), 28 states have internal predecessors, (959), 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) [2024-11-20 17:47:55,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:55,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 80 [2024-11-20 17:47:55,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:56,397 INFO L124 PetriNetUnfolderBase]: 2292/3978 cut-off events. [2024-11-20 17:47:56,397 INFO L125 PetriNetUnfolderBase]: For 14098/14678 co-relation queries the response was YES. [2024-11-20 17:47:56,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14895 conditions, 3978 events. 2292/3978 cut-off events. For 14098/14678 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 23598 event pairs, 708 based on Foata normal form. 0/3795 useless extension candidates. Maximal degree in co-relation 8016. Up to 788 conditions per place. [2024-11-20 17:47:56,419 INFO L140 encePairwiseOnDemand]: 64/80 looper letters, 142 selfloop transitions, 43 changer transitions 0/203 dead transitions. [2024-11-20 17:47:56,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 203 transitions, 1653 flow [2024-11-20 17:47:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 17:47:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 17:47:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 773 transitions. [2024-11-20 17:47:56,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.483125 [2024-11-20 17:47:56,421 INFO L175 Difference]: Start difference. First operand has 110 places, 113 transitions, 682 flow. Second operand 20 states and 773 transitions. [2024-11-20 17:47:56,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 203 transitions, 1653 flow [2024-11-20 17:47:56,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 203 transitions, 1621 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:56,429 INFO L231 Difference]: Finished difference. Result has 124 places, 118 transitions, 780 flow [2024-11-20 17:47:56,429 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=780, PETRI_PLACES=124, PETRI_TRANSITIONS=118} [2024-11-20 17:47:56,429 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 45 predicate places. [2024-11-20 17:47:56,429 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 118 transitions, 780 flow [2024-11-20 17:47:56,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 34.25) internal successors, (959), 28 states have internal predecessors, (959), 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) [2024-11-20 17:47:56,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:56,430 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:56,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-20 17:47:56,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-20 17:47:56,635 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:56,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:56,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1130851741, now seen corresponding path program 1 times [2024-11-20 17:47:56,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:56,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733837758] [2024-11-20 17:47:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:56,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:56,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:56,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733837758] [2024-11-20 17:47:56,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733837758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:56,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602204877] [2024-11-20 17:47:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:56,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:56,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:56,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:56,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:47:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:56,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:47:56,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:56,944 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 [2024-11-20 17:47:56,967 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 15 treesize of output 11 [2024-11-20 17:47:56,989 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 [2024-11-20 17:47:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:57,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:57,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602204877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:57,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:57,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2024-11-20 17:47:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158459047] [2024-11-20 17:47:57,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:57,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 17:47:57,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 17:47:57,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-11-20 17:47:58,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 80 [2024-11-20 17:47:58,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 118 transitions, 780 flow. Second operand has 25 states, 25 states have (on average 41.52) internal successors, (1038), 25 states have internal predecessors, (1038), 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) [2024-11-20 17:47:58,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:58,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 80 [2024-11-20 17:47:58,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:59,114 INFO L124 PetriNetUnfolderBase]: 996/1757 cut-off events. [2024-11-20 17:47:59,114 INFO L125 PetriNetUnfolderBase]: For 8313/9141 co-relation queries the response was YES. [2024-11-20 17:47:59,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 1757 events. 996/1757 cut-off events. For 8313/9141 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9128 event pairs, 324 based on Foata normal form. 74/1695 useless extension candidates. Maximal degree in co-relation 5029. Up to 386 conditions per place. [2024-11-20 17:47:59,123 INFO L140 encePairwiseOnDemand]: 65/80 looper letters, 120 selfloop transitions, 42 changer transitions 0/184 dead transitions. [2024-11-20 17:47:59,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 184 transitions, 1592 flow [2024-11-20 17:47:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:47:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:47:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 665 transitions. [2024-11-20 17:47:59,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-20 17:47:59,124 INFO L175 Difference]: Start difference. First operand has 124 places, 118 transitions, 780 flow. Second operand 14 states and 665 transitions. [2024-11-20 17:47:59,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 184 transitions, 1592 flow [2024-11-20 17:47:59,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 184 transitions, 1555 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:59,131 INFO L231 Difference]: Finished difference. Result has 132 places, 117 transitions, 825 flow [2024-11-20 17:47:59,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=825, PETRI_PLACES=132, PETRI_TRANSITIONS=117} [2024-11-20 17:47:59,132 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 53 predicate places. [2024-11-20 17:47:59,132 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 117 transitions, 825 flow [2024-11-20 17:47:59,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 41.52) internal successors, (1038), 25 states have internal predecessors, (1038), 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) [2024-11-20 17:47:59,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:59,132 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:59,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 17:47:59,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-20 17:47:59,333 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:47:59,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1263688391, now seen corresponding path program 1 times [2024-11-20 17:47:59,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:59,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210034201] [2024-11-20 17:47:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:59,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:59,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:59,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210034201] [2024-11-20 17:47:59,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210034201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:59,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533128555] [2024-11-20 17:47:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:59,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:59,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:59,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 17:47:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:59,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 17:47:59,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:59,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:59,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533128555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:59,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:59,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 17:47:59,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680868654] [2024-11-20 17:47:59,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:59,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:47:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:59,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:47:59,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:47:59,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:47:59,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 117 transitions, 825 flow. Second operand has 16 states, 16 states have (on average 46.4375) internal successors, (743), 16 states have internal predecessors, (743), 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) [2024-11-20 17:47:59,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:59,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:47:59,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:00,146 INFO L124 PetriNetUnfolderBase]: 1019/1849 cut-off events. [2024-11-20 17:48:00,146 INFO L125 PetriNetUnfolderBase]: For 8367/9083 co-relation queries the response was YES. [2024-11-20 17:48:00,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7521 conditions, 1849 events. 1019/1849 cut-off events. For 8367/9083 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9628 event pairs, 468 based on Foata normal form. 35/1830 useless extension candidates. Maximal degree in co-relation 5033. Up to 832 conditions per place. [2024-11-20 17:48:00,155 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 83 selfloop transitions, 50 changer transitions 0/156 dead transitions. [2024-11-20 17:48:00,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 156 transitions, 1311 flow [2024-11-20 17:48:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:48:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:48:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 543 transitions. [2024-11-20 17:48:00,156 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.67875 [2024-11-20 17:48:00,156 INFO L175 Difference]: Start difference. First operand has 132 places, 117 transitions, 825 flow. Second operand 10 states and 543 transitions. [2024-11-20 17:48:00,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 156 transitions, 1311 flow [2024-11-20 17:48:00,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 156 transitions, 1215 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-11-20 17:48:00,162 INFO L231 Difference]: Finished difference. Result has 131 places, 121 transitions, 894 flow [2024-11-20 17:48:00,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=894, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2024-11-20 17:48:00,163 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 52 predicate places. [2024-11-20 17:48:00,163 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 894 flow [2024-11-20 17:48:00,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 46.4375) internal successors, (743), 16 states have internal predecessors, (743), 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) [2024-11-20 17:48:00,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:00,164 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:00,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 17:48:00,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:00,364 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:00,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:00,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1148899504, now seen corresponding path program 2 times [2024-11-20 17:48:00,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:00,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838843774] [2024-11-20 17:48:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:00,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:48:00,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:00,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838843774] [2024-11-20 17:48:00,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838843774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:00,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532773408] [2024-11-20 17:48:00,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:48:00,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:00,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:00,703 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:00,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 17:48:00,788 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:48:00,788 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:48:00,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-20 17:48:00,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:00,795 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 [2024-11-20 17:48:00,837 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:48:00,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 17:48:00,895 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-20 17:48:00,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2024-11-20 17:48:00,954 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-20 17:48:00,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-20 17:48:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:48:01,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:01,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532773408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:01,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:01,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2024-11-20 17:48:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708340778] [2024-11-20 17:48:01,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:01,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 17:48:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:01,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 17:48:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2024-11-20 17:48:03,200 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 80 [2024-11-20 17:48:03,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 894 flow. Second operand has 26 states, 26 states have (on average 32.46153846153846) internal successors, (844), 26 states have internal predecessors, (844), 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) [2024-11-20 17:48:03,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:03,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 80 [2024-11-20 17:48:03,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:04,540 INFO L124 PetriNetUnfolderBase]: 2248/3983 cut-off events. [2024-11-20 17:48:04,540 INFO L125 PetriNetUnfolderBase]: For 15409/15918 co-relation queries the response was YES. [2024-11-20 17:48:04,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15263 conditions, 3983 events. 2248/3983 cut-off events. For 15409/15918 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 23469 event pairs, 836 based on Foata normal form. 62/4001 useless extension candidates. Maximal degree in co-relation 10339. Up to 1087 conditions per place. [2024-11-20 17:48:04,592 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 141 selfloop transitions, 42 changer transitions 0/201 dead transitions. [2024-11-20 17:48:04,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 201 transitions, 1658 flow [2024-11-20 17:48:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:48:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:48:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 625 transitions. [2024-11-20 17:48:04,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48828125 [2024-11-20 17:48:04,595 INFO L175 Difference]: Start difference. First operand has 131 places, 121 transitions, 894 flow. Second operand 16 states and 625 transitions. [2024-11-20 17:48:04,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 201 transitions, 1658 flow [2024-11-20 17:48:04,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 201 transitions, 1563 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-20 17:48:04,605 INFO L231 Difference]: Finished difference. Result has 143 places, 125 transitions, 933 flow [2024-11-20 17:48:04,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=933, PETRI_PLACES=143, PETRI_TRANSITIONS=125} [2024-11-20 17:48:04,606 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 64 predicate places. [2024-11-20 17:48:04,606 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 125 transitions, 933 flow [2024-11-20 17:48:04,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 32.46153846153846) internal successors, (844), 26 states have internal predecessors, (844), 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) [2024-11-20 17:48:04,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:04,606 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:04,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-20 17:48:04,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 17:48:04,807 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:04,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:04,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1256146974, now seen corresponding path program 1 times [2024-11-20 17:48:04,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:04,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408666913] [2024-11-20 17:48:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:04,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:48:05,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:05,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408666913] [2024-11-20 17:48:05,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408666913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:05,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034110187] [2024-11-20 17:48:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:05,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:05,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:05,083 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:05,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 17:48:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:05,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-20 17:48:05,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:05,194 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 [2024-11-20 17:48:05,228 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:48:05,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 17:48:05,293 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-20 17:48:05,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-20 17:48:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:48:05,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:05,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034110187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:05,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:05,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-11-20 17:48:05,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866490079] [2024-11-20 17:48:05,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:05,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 17:48:05,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:05,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 17:48:05,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-11-20 17:48:07,167 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2024-11-20 17:48:07,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 125 transitions, 933 flow. Second operand has 25 states, 25 states have (on average 37.36) internal successors, (934), 25 states have internal predecessors, (934), 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) [2024-11-20 17:48:07,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:07,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2024-11-20 17:48:07,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:08,107 INFO L124 PetriNetUnfolderBase]: 1299/2314 cut-off events. [2024-11-20 17:48:08,107 INFO L125 PetriNetUnfolderBase]: For 11193/11837 co-relation queries the response was YES. [2024-11-20 17:48:08,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9953 conditions, 2314 events. 1299/2314 cut-off events. For 11193/11837 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12092 event pairs, 468 based on Foata normal form. 34/2271 useless extension candidates. Maximal degree in co-relation 6512. Up to 600 conditions per place. [2024-11-20 17:48:08,120 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 127 selfloop transitions, 40 changer transitions 0/190 dead transitions. [2024-11-20 17:48:08,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 190 transitions, 1602 flow [2024-11-20 17:48:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 17:48:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 17:48:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 726 transitions. [2024-11-20 17:48:08,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5338235294117647 [2024-11-20 17:48:08,121 INFO L175 Difference]: Start difference. First operand has 143 places, 125 transitions, 933 flow. Second operand 17 states and 726 transitions. [2024-11-20 17:48:08,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 190 transitions, 1602 flow [2024-11-20 17:48:08,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 190 transitions, 1538 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-20 17:48:08,132 INFO L231 Difference]: Finished difference. Result has 152 places, 127 transitions, 979 flow [2024-11-20 17:48:08,132 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=979, PETRI_PLACES=152, PETRI_TRANSITIONS=127} [2024-11-20 17:48:08,132 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2024-11-20 17:48:08,132 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 127 transitions, 979 flow [2024-11-20 17:48:08,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 37.36) internal successors, (934), 25 states have internal predecessors, (934), 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) [2024-11-20 17:48:08,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:08,133 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:08,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 17:48:08,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-20 17:48:08,333 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:08,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:08,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1850016970, now seen corresponding path program 1 times [2024-11-20 17:48:08,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:08,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123966189] [2024-11-20 17:48:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:08,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:08,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:08,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123966189] [2024-11-20 17:48:08,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123966189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:08,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758554879] [2024-11-20 17:48:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:08,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:08,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:08,406 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:08,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 17:48:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:08,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:48:08,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:08,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:08,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758554879] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:08,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:48:08,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-20 17:48:08,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505081652] [2024-11-20 17:48:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:48:08,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:48:08,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:48:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:48:08,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:48:08,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 127 transitions, 979 flow. Second operand has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:48:08,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:08,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:48:08,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:08,761 INFO L124 PetriNetUnfolderBase]: 1145/2319 cut-off events. [2024-11-20 17:48:08,762 INFO L125 PetriNetUnfolderBase]: For 11361/11768 co-relation queries the response was YES. [2024-11-20 17:48:08,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9735 conditions, 2319 events. 1145/2319 cut-off events. For 11361/11768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 13727 event pairs, 392 based on Foata normal form. 68/2299 useless extension candidates. Maximal degree in co-relation 6519. Up to 976 conditions per place. [2024-11-20 17:48:08,775 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 110 selfloop transitions, 9 changer transitions 0/146 dead transitions. [2024-11-20 17:48:08,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 146 transitions, 1325 flow [2024-11-20 17:48:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:48:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:48:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-20 17:48:08,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.67 [2024-11-20 17:48:08,776 INFO L175 Difference]: Start difference. First operand has 152 places, 127 transitions, 979 flow. Second operand 5 states and 268 transitions. [2024-11-20 17:48:08,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 146 transitions, 1325 flow [2024-11-20 17:48:08,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 146 transitions, 1248 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-11-20 17:48:08,785 INFO L231 Difference]: Finished difference. Result has 141 places, 126 transitions, 908 flow [2024-11-20 17:48:08,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=141, PETRI_TRANSITIONS=126} [2024-11-20 17:48:08,788 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 62 predicate places. [2024-11-20 17:48:08,789 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 126 transitions, 908 flow [2024-11-20 17:48:08,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:48:08,789 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:08,789 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:08,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-20 17:48:08,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-20 17:48:08,990 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:08,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:08,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1972199434, now seen corresponding path program 2 times [2024-11-20 17:48:08,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:08,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918650242] [2024-11-20 17:48:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:48:09,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918650242] [2024-11-20 17:48:09,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918650242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776405762] [2024-11-20 17:48:09,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:48:09,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:09,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:09,318 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:09,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 17:48:09,413 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:48:09,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:48:09,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-20 17:48:09,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:09,419 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 [2024-11-20 17:48:09,421 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 [2024-11-20 17:48:09,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:48:09,466 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 [2024-11-20 17:48:09,480 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:48:09,481 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 [2024-11-20 17:48:09,529 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:48:09,529 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 [2024-11-20 17:48:09,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-20 17:48:09,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:48:09,678 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:48:09,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2024-11-20 17:48:09,692 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:48:09,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2024-11-20 17:48:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:48:09,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:10,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776405762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:10,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:10,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-11-20 17:48:10,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237273497] [2024-11-20 17:48:10,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:10,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 17:48:10,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:10,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 17:48:10,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-11-20 17:48:12,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 80 [2024-11-20 17:48:12,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 126 transitions, 908 flow. Second operand has 26 states, 26 states have (on average 32.46153846153846) internal successors, (844), 26 states have internal predecessors, (844), 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) [2024-11-20 17:48:12,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:12,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 80 [2024-11-20 17:48:12,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:14,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 17:48:16,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 17:48:16,973 INFO L124 PetriNetUnfolderBase]: 2692/4770 cut-off events. [2024-11-20 17:48:16,974 INFO L125 PetriNetUnfolderBase]: For 28796/29731 co-relation queries the response was YES. [2024-11-20 17:48:16,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19285 conditions, 4770 events. 2692/4770 cut-off events. For 28796/29731 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 29302 event pairs, 977 based on Foata normal form. 84/4793 useless extension candidates. Maximal degree in co-relation 14826. Up to 1393 conditions per place. [2024-11-20 17:48:16,997 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 143 selfloop transitions, 42 changer transitions 0/206 dead transitions. [2024-11-20 17:48:16,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 206 transitions, 1806 flow [2024-11-20 17:48:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 17:48:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 17:48:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 681 transitions. [2024-11-20 17:48:16,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47291666666666665 [2024-11-20 17:48:16,998 INFO L175 Difference]: Start difference. First operand has 141 places, 126 transitions, 908 flow. Second operand 18 states and 681 transitions. [2024-11-20 17:48:16,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 206 transitions, 1806 flow [2024-11-20 17:48:17,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 206 transitions, 1780 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-20 17:48:17,010 INFO L231 Difference]: Finished difference. Result has 158 places, 130 transitions, 1028 flow [2024-11-20 17:48:17,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1028, PETRI_PLACES=158, PETRI_TRANSITIONS=130} [2024-11-20 17:48:17,011 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 79 predicate places. [2024-11-20 17:48:17,011 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 130 transitions, 1028 flow [2024-11-20 17:48:17,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 32.46153846153846) internal successors, (844), 26 states have internal predecessors, (844), 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) [2024-11-20 17:48:17,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:17,011 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:17,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-20 17:48:17,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-20 17:48:17,212 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:17,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:17,213 INFO L85 PathProgramCache]: Analyzing trace with hash 285851250, now seen corresponding path program 1 times [2024-11-20 17:48:17,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:17,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913336644] [2024-11-20 17:48:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:48:17,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:17,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913336644] [2024-11-20 17:48:17,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913336644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:17,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546612120] [2024-11-20 17:48:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:17,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:17,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:17,451 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:17,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 17:48:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:17,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-20 17:48:17,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:17,549 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 [2024-11-20 17:48:17,586 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-20 17:48:17,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-20 17:48:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:48:17,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546612120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:18,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2024-11-20 17:48:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104454243] [2024-11-20 17:48:18,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:18,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 17:48:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 17:48:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-11-20 17:48:19,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2024-11-20 17:48:19,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 130 transitions, 1028 flow. Second operand has 25 states, 25 states have (on average 37.48) internal successors, (937), 25 states have internal predecessors, (937), 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) [2024-11-20 17:48:19,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:19,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2024-11-20 17:48:19,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:20,633 INFO L124 PetriNetUnfolderBase]: 1449/2894 cut-off events. [2024-11-20 17:48:20,633 INFO L125 PetriNetUnfolderBase]: For 19000/19741 co-relation queries the response was YES. [2024-11-20 17:48:20,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12821 conditions, 2894 events. 1449/2894 cut-off events. For 19000/19741 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 17222 event pairs, 647 based on Foata normal form. 84/2880 useless extension candidates. Maximal degree in co-relation 9649. Up to 839 conditions per place. [2024-11-20 17:48:20,648 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 112 selfloop transitions, 33 changer transitions 0/173 dead transitions. [2024-11-20 17:48:20,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 173 transitions, 1575 flow [2024-11-20 17:48:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:48:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:48:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 666 transitions. [2024-11-20 17:48:20,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5203125 [2024-11-20 17:48:20,650 INFO L175 Difference]: Start difference. First operand has 158 places, 130 transitions, 1028 flow. Second operand 16 states and 666 transitions. [2024-11-20 17:48:20,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 173 transitions, 1575 flow [2024-11-20 17:48:20,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 173 transitions, 1471 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-11-20 17:48:20,662 INFO L231 Difference]: Finished difference. Result has 160 places, 129 transitions, 999 flow [2024-11-20 17:48:20,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=999, PETRI_PLACES=160, PETRI_TRANSITIONS=129} [2024-11-20 17:48:20,662 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 81 predicate places. [2024-11-20 17:48:20,662 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 129 transitions, 999 flow [2024-11-20 17:48:20,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 37.48) internal successors, (937), 25 states have internal predecessors, (937), 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) [2024-11-20 17:48:20,663 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:20,663 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:20,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-20 17:48:20,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:20,863 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:20,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1008641040, now seen corresponding path program 1 times [2024-11-20 17:48:20,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:20,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744702232] [2024-11-20 17:48:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:20,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 17:48:21,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:21,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744702232] [2024-11-20 17:48:21,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744702232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:21,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838705827] [2024-11-20 17:48:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:21,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:21,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:21,207 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:21,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 17:48:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:21,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-20 17:48:21,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:21,308 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 [2024-11-20 17:48:21,345 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:48:21,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 17:48:21,408 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-20 17:48:21,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-20 17:48:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:48:21,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:22,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838705827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:22,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:22,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 28 [2024-11-20 17:48:22,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438377135] [2024-11-20 17:48:22,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:22,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 17:48:22,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:22,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 17:48:22,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2024-11-20 17:48:25,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2024-11-20 17:48:25,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 129 transitions, 999 flow. Second operand has 29 states, 29 states have (on average 37.37931034482759) internal successors, (1084), 29 states have internal predecessors, (1084), 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) [2024-11-20 17:48:25,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:25,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2024-11-20 17:48:25,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:26,547 INFO L124 PetriNetUnfolderBase]: 1397/2472 cut-off events. [2024-11-20 17:48:26,547 INFO L125 PetriNetUnfolderBase]: For 19061/19998 co-relation queries the response was YES. [2024-11-20 17:48:26,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11186 conditions, 2472 events. 1397/2472 cut-off events. For 19061/19998 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 13205 event pairs, 530 based on Foata normal form. 43/2437 useless extension candidates. Maximal degree in co-relation 8256. Up to 695 conditions per place. [2024-11-20 17:48:26,558 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 118 selfloop transitions, 43 changer transitions 0/189 dead transitions. [2024-11-20 17:48:26,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 189 transitions, 1722 flow [2024-11-20 17:48:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 17:48:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 17:48:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 792 transitions. [2024-11-20 17:48:26,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5210526315789473 [2024-11-20 17:48:26,560 INFO L175 Difference]: Start difference. First operand has 160 places, 129 transitions, 999 flow. Second operand 19 states and 792 transitions. [2024-11-20 17:48:26,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 189 transitions, 1722 flow [2024-11-20 17:48:26,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 189 transitions, 1683 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:48:26,568 INFO L231 Difference]: Finished difference. Result has 176 places, 132 transitions, 1110 flow [2024-11-20 17:48:26,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1110, PETRI_PLACES=176, PETRI_TRANSITIONS=132} [2024-11-20 17:48:26,568 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 97 predicate places. [2024-11-20 17:48:26,569 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 132 transitions, 1110 flow [2024-11-20 17:48:26,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 37.37931034482759) internal successors, (1084), 29 states have internal predecessors, (1084), 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) [2024-11-20 17:48:26,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:26,569 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:26,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-20 17:48:26,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-20 17:48:26,770 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:26,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash -174829993, now seen corresponding path program 3 times [2024-11-20 17:48:26,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:26,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075231307] [2024-11-20 17:48:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:26,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:26,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:26,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075231307] [2024-11-20 17:48:26,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075231307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:26,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132003638] [2024-11-20 17:48:26,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:48:26,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:26,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:26,867 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:26,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 17:48:26,955 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:48:26,956 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:48:26,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 17:48:26,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:26,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:48:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:48:27,004 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 [2024-11-20 17:48:27,017 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:48:27,017 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 [2024-11-20 17:48:27,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:48:27,047 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 [2024-11-20 17:48:27,051 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:48:27,051 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 [2024-11-20 17:48:27,081 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:48:27,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-20 17:48:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-20 17:48:27,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:27,695 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 307 treesize of output 301 [2024-11-20 17:48:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-20 17:48:27,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132003638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:27,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:27,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2024-11-20 17:48:27,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005357564] [2024-11-20 17:48:27,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:27,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 17:48:27,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 17:48:27,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2024-11-20 17:48:30,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-11-20 17:48:30,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 132 transitions, 1110 flow. Second operand has 29 states, 29 states have (on average 35.51724137931034) internal successors, (1030), 29 states have internal predecessors, (1030), 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) [2024-11-20 17:48:30,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:30,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-11-20 17:48:30,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:34,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 17:48:36,520 INFO L124 PetriNetUnfolderBase]: 5084/8381 cut-off events. [2024-11-20 17:48:36,520 INFO L125 PetriNetUnfolderBase]: For 58377/59837 co-relation queries the response was YES. [2024-11-20 17:48:36,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38107 conditions, 8381 events. 5084/8381 cut-off events. For 58377/59837 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 50569 event pairs, 1132 based on Foata normal form. 164/8526 useless extension candidates. Maximal degree in co-relation 18396. Up to 1419 conditions per place. [2024-11-20 17:48:36,567 INFO L140 encePairwiseOnDemand]: 64/80 looper letters, 265 selfloop transitions, 57 changer transitions 0/343 dead transitions. [2024-11-20 17:48:36,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 343 transitions, 3362 flow [2024-11-20 17:48:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-20 17:48:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-20 17:48:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1211 transitions. [2024-11-20 17:48:36,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5045833333333334 [2024-11-20 17:48:36,569 INFO L175 Difference]: Start difference. First operand has 176 places, 132 transitions, 1110 flow. Second operand 30 states and 1211 transitions. [2024-11-20 17:48:36,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 343 transitions, 3362 flow [2024-11-20 17:48:36,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 343 transitions, 3196 flow, removed 9 selfloop flow, removed 15 redundant places. [2024-11-20 17:48:36,603 INFO L231 Difference]: Finished difference. Result has 190 places, 137 transitions, 1210 flow [2024-11-20 17:48:36,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1210, PETRI_PLACES=190, PETRI_TRANSITIONS=137} [2024-11-20 17:48:36,604 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 111 predicate places. [2024-11-20 17:48:36,604 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 137 transitions, 1210 flow [2024-11-20 17:48:36,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 35.51724137931034) internal successors, (1030), 29 states have internal predecessors, (1030), 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) [2024-11-20 17:48:36,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:36,605 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:36,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-20 17:48:36,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:36,805 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:36,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1203101900, now seen corresponding path program 1 times [2024-11-20 17:48:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:36,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671472131] [2024-11-20 17:48:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:36,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:36,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671472131] [2024-11-20 17:48:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671472131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260135972] [2024-11-20 17:48:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:36,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:36,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:36,932 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:36,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 17:48:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:37,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:48:37,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:37,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:37,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-20 17:48:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:37,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260135972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:37,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:37,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-20 17:48:37,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152805504] [2024-11-20 17:48:37,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:37,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:48:37,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:48:37,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:48:38,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:48:38,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 137 transitions, 1210 flow. Second operand has 20 states, 20 states have (on average 46.25) internal successors, (925), 20 states have internal predecessors, (925), 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) [2024-11-20 17:48:38,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:38,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:48:38,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:38,690 INFO L124 PetriNetUnfolderBase]: 1675/3531 cut-off events. [2024-11-20 17:48:38,690 INFO L125 PetriNetUnfolderBase]: For 25519/26199 co-relation queries the response was YES. [2024-11-20 17:48:38,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16982 conditions, 3531 events. 1675/3531 cut-off events. For 25519/26199 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 23027 event pairs, 826 based on Foata normal form. 86/3498 useless extension candidates. Maximal degree in co-relation 8844. Up to 1353 conditions per place. [2024-11-20 17:48:38,708 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 109 selfloop transitions, 38 changer transitions 0/180 dead transitions. [2024-11-20 17:48:38,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 180 transitions, 1876 flow [2024-11-20 17:48:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:48:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:48:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 451 transitions. [2024-11-20 17:48:38,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7046875 [2024-11-20 17:48:38,709 INFO L175 Difference]: Start difference. First operand has 190 places, 137 transitions, 1210 flow. Second operand 8 states and 451 transitions. [2024-11-20 17:48:38,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 180 transitions, 1876 flow [2024-11-20 17:48:38,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 180 transitions, 1723 flow, removed 20 selfloop flow, removed 14 redundant places. [2024-11-20 17:48:38,726 INFO L231 Difference]: Finished difference. Result has 184 places, 137 transitions, 1172 flow [2024-11-20 17:48:38,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1172, PETRI_PLACES=184, PETRI_TRANSITIONS=137} [2024-11-20 17:48:38,727 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 105 predicate places. [2024-11-20 17:48:38,727 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 137 transitions, 1172 flow [2024-11-20 17:48:38,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 46.25) internal successors, (925), 20 states have internal predecessors, (925), 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) [2024-11-20 17:48:38,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:38,727 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:38,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-20 17:48:38,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:38,930 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:38,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash -930317277, now seen corresponding path program 1 times [2024-11-20 17:48:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:38,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480138855] [2024-11-20 17:48:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:38,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:39,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:39,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480138855] [2024-11-20 17:48:39,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480138855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:39,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110447495] [2024-11-20 17:48:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:39,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:39,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:39,005 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:39,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 17:48:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:39,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:48:39,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:39,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:39,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110447495] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:39,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:48:39,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-20 17:48:39,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878214714] [2024-11-20 17:48:39,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:48:39,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:48:39,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:48:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:48:39,263 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-20 17:48:39,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 137 transitions, 1172 flow. Second operand has 7 states, 7 states have (on average 47.285714285714285) internal successors, (331), 7 states have internal predecessors, (331), 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) [2024-11-20 17:48:39,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:39,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-20 17:48:39,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:39,918 INFO L124 PetriNetUnfolderBase]: 2944/5997 cut-off events. [2024-11-20 17:48:39,918 INFO L125 PetriNetUnfolderBase]: For 39581/40065 co-relation queries the response was YES. [2024-11-20 17:48:39,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26851 conditions, 5997 events. 2944/5997 cut-off events. For 39581/40065 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 43164 event pairs, 1089 based on Foata normal form. 0/5628 useless extension candidates. Maximal degree in co-relation 19848. Up to 2205 conditions per place. [2024-11-20 17:48:39,947 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 190 selfloop transitions, 28 changer transitions 0/249 dead transitions. [2024-11-20 17:48:39,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 249 transitions, 2759 flow [2024-11-20 17:48:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:48:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:48:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 478 transitions. [2024-11-20 17:48:39,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2024-11-20 17:48:39,948 INFO L175 Difference]: Start difference. First operand has 184 places, 137 transitions, 1172 flow. Second operand 9 states and 478 transitions. [2024-11-20 17:48:39,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 249 transitions, 2759 flow [2024-11-20 17:48:39,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 249 transitions, 2617 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-20 17:48:39,971 INFO L231 Difference]: Finished difference. Result has 186 places, 155 transitions, 1286 flow [2024-11-20 17:48:39,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1286, PETRI_PLACES=186, PETRI_TRANSITIONS=155} [2024-11-20 17:48:39,972 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2024-11-20 17:48:39,972 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 155 transitions, 1286 flow [2024-11-20 17:48:39,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 47.285714285714285) internal successors, (331), 7 states have internal predecessors, (331), 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) [2024-11-20 17:48:39,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:39,972 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:39,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-20 17:48:40,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:40,173 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:40,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:40,173 INFO L85 PathProgramCache]: Analyzing trace with hash -23945963, now seen corresponding path program 2 times [2024-11-20 17:48:40,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:40,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913413652] [2024-11-20 17:48:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:40,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:40,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:40,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913413652] [2024-11-20 17:48:40,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913413652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:40,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620570843] [2024-11-20 17:48:40,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:48:40,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:40,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:40,252 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:40,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-20 17:48:40,346 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:48:40,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:48:40,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 17:48:40,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:40,379 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 [2024-11-20 17:48:40,389 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 [2024-11-20 17:48:40,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:48:40,431 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 [2024-11-20 17:48:40,440 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:48:40,440 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 [2024-11-20 17:48:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:48:40,625 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:48:40,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620570843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:48:40,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:48:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2024-11-20 17:48:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233708324] [2024-11-20 17:48:40,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:48:40,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:48:40,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:48:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:48:40,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 80 [2024-11-20 17:48:40,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 155 transitions, 1286 flow. Second operand has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 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) [2024-11-20 17:48:40,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:40,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 80 [2024-11-20 17:48:40,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:41,332 INFO L124 PetriNetUnfolderBase]: 1928/4063 cut-off events. [2024-11-20 17:48:41,333 INFO L125 PetriNetUnfolderBase]: For 33265/34272 co-relation queries the response was YES. [2024-11-20 17:48:41,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20046 conditions, 4063 events. 1928/4063 cut-off events. For 33265/34272 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 27479 event pairs, 1304 based on Foata normal form. 6/3820 useless extension candidates. Maximal degree in co-relation 14814. Up to 2762 conditions per place. [2024-11-20 17:48:41,359 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 105 selfloop transitions, 10 changer transitions 0/154 dead transitions. [2024-11-20 17:48:41,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 154 transitions, 1514 flow [2024-11-20 17:48:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:48:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:48:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 274 transitions. [2024-11-20 17:48:41,360 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-11-20 17:48:41,361 INFO L175 Difference]: Start difference. First operand has 186 places, 155 transitions, 1286 flow. Second operand 6 states and 274 transitions. [2024-11-20 17:48:41,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 154 transitions, 1514 flow [2024-11-20 17:48:41,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 154 transitions, 1511 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:48:41,382 INFO L231 Difference]: Finished difference. Result has 188 places, 154 transitions, 1301 flow [2024-11-20 17:48:41,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1301, PETRI_PLACES=188, PETRI_TRANSITIONS=154} [2024-11-20 17:48:41,383 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 109 predicate places. [2024-11-20 17:48:41,383 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 154 transitions, 1301 flow [2024-11-20 17:48:41,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 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) [2024-11-20 17:48:41,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:41,383 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:41,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-20 17:48:41,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:41,585 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:41,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2101676065, now seen corresponding path program 1 times [2024-11-20 17:48:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:41,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889579364] [2024-11-20 17:48:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:41,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:41,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:41,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889579364] [2024-11-20 17:48:41,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889579364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:41,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620698634] [2024-11-20 17:48:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:41,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:41,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:41,686 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:41,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-20 17:48:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:41,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:48:41,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:41,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:41,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620698634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:41,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:41,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-20 17:48:41,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208533846] [2024-11-20 17:48:41,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:41,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 17:48:41,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 17:48:41,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:48:42,066 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-20 17:48:42,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 154 transitions, 1301 flow. Second operand has 15 states, 15 states have (on average 46.333333333333336) internal successors, (695), 15 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:48:42,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:42,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-20 17:48:42,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:43,081 INFO L124 PetriNetUnfolderBase]: 4126/8341 cut-off events. [2024-11-20 17:48:43,082 INFO L125 PetriNetUnfolderBase]: For 58300/59353 co-relation queries the response was YES. [2024-11-20 17:48:43,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39241 conditions, 8341 events. 4126/8341 cut-off events. For 58300/59353 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 63513 event pairs, 1148 based on Foata normal form. 158/8347 useless extension candidates. Maximal degree in co-relation 28641. Up to 2710 conditions per place. [2024-11-20 17:48:43,129 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 239 selfloop transitions, 71 changer transitions 0/340 dead transitions. [2024-11-20 17:48:43,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 340 transitions, 3948 flow [2024-11-20 17:48:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:48:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:48:43,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 732 transitions. [2024-11-20 17:48:43,131 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-11-20 17:48:43,131 INFO L175 Difference]: Start difference. First operand has 188 places, 154 transitions, 1301 flow. Second operand 14 states and 732 transitions. [2024-11-20 17:48:43,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 340 transitions, 3948 flow [2024-11-20 17:48:43,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 340 transitions, 3928 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:48:43,195 INFO L231 Difference]: Finished difference. Result has 204 places, 195 transitions, 1942 flow [2024-11-20 17:48:43,195 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1942, PETRI_PLACES=204, PETRI_TRANSITIONS=195} [2024-11-20 17:48:43,195 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 125 predicate places. [2024-11-20 17:48:43,196 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 195 transitions, 1942 flow [2024-11-20 17:48:43,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 46.333333333333336) internal successors, (695), 15 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:48:43,196 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:43,196 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:43,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-20 17:48:43,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-20 17:48:43,396 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:43,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash -620900583, now seen corresponding path program 2 times [2024-11-20 17:48:43,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:43,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752716390] [2024-11-20 17:48:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:48:43,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:43,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752716390] [2024-11-20 17:48:43,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752716390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:43,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948983387] [2024-11-20 17:48:43,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:48:43,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:43,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:43,475 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:43,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-20 17:48:43,568 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:48:43,568 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:48:43,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 17:48:43,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:43,605 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 [2024-11-20 17:48:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:48:43,781 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:48:43,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948983387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:48:43,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:48:43,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2024-11-20 17:48:43,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686265753] [2024-11-20 17:48:43,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:48:43,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:48:43,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:48:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:48:43,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-20 17:48:43,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 195 transitions, 1942 flow. Second operand has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 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) [2024-11-20 17:48:43,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:43,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-20 17:48:43,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:44,861 INFO L124 PetriNetUnfolderBase]: 3238/6548 cut-off events. [2024-11-20 17:48:44,861 INFO L125 PetriNetUnfolderBase]: For 79796/82132 co-relation queries the response was YES. [2024-11-20 17:48:44,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37120 conditions, 6548 events. 3238/6548 cut-off events. For 79796/82132 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 47649 event pairs, 1825 based on Foata normal form. 186/6315 useless extension candidates. Maximal degree in co-relation 30072. Up to 4459 conditions per place. [2024-11-20 17:48:44,978 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 140 selfloop transitions, 6 changer transitions 0/194 dead transitions. [2024-11-20 17:48:44,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 194 transitions, 2232 flow [2024-11-20 17:48:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:48:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:48:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2024-11-20 17:48:44,979 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-11-20 17:48:44,979 INFO L175 Difference]: Start difference. First operand has 204 places, 195 transitions, 1942 flow. Second operand 5 states and 254 transitions. [2024-11-20 17:48:44,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 194 transitions, 2232 flow [2024-11-20 17:48:45,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 194 transitions, 2156 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-20 17:48:45,060 INFO L231 Difference]: Finished difference. Result has 202 places, 194 transitions, 1876 flow [2024-11-20 17:48:45,060 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1876, PETRI_PLACES=202, PETRI_TRANSITIONS=194} [2024-11-20 17:48:45,060 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 123 predicate places. [2024-11-20 17:48:45,061 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 194 transitions, 1876 flow [2024-11-20 17:48:45,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 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) [2024-11-20 17:48:45,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:45,061 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:45,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-20 17:48:45,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-20 17:48:45,261 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-20 17:48:45,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:45,262 INFO L85 PathProgramCache]: Analyzing trace with hash 834749361, now seen corresponding path program 3 times [2024-11-20 17:48:45,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:45,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64051717] [2024-11-20 17:48:45,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:45,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:48:45,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:45,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64051717] [2024-11-20 17:48:45,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64051717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:45,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963365936] [2024-11-20 17:48:45,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:48:45,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:45,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:45,373 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:48:45,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-20 17:48:45,483 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:48:45,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:48:45,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:48:45,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:45,492 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 [2024-11-20 17:48:45,495 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 [2024-11-20 17:48:45,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:48:45,547 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 [2024-11-20 17:48:45,559 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 17:48:45,559 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 17 treesize of output 21 [2024-11-20 17:48:45,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:48:45,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2024-11-20 17:48:45,649 INFO L349 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2024-11-20 17:48:45,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2024-11-20 17:48:45,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:48:45,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2024-11-20 17:48:45,747 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2024-11-20 17:48:45,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2024-11-20 17:48:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-20 17:48:45,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-20 17:48:46,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963365936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:46,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:46,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2024-11-20 17:48:46,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151855977] [2024-11-20 17:48:46,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:46,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 17:48:46,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 17:48:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2024-11-20 17:48:50,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-11-20 17:48:50,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 194 transitions, 1876 flow. Second operand has 26 states, 26 states have (on average 35.88461538461539) internal successors, (933), 26 states have internal predecessors, (933), 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) [2024-11-20 17:48:50,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:50,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-11-20 17:48:50,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:57,001 INFO L124 PetriNetUnfolderBase]: 8395/13815 cut-off events. [2024-11-20 17:48:57,002 INFO L125 PetriNetUnfolderBase]: For 122522/123941 co-relation queries the response was YES. [2024-11-20 17:48:57,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71688 conditions, 13815 events. 8395/13815 cut-off events. For 122522/123941 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 91882 event pairs, 1730 based on Foata normal form. 263/13992 useless extension candidates. Maximal degree in co-relation 55706. Up to 1842 conditions per place. [2024-11-20 17:48:57,098 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 297 selfloop transitions, 100 changer transitions 0/430 dead transitions. [2024-11-20 17:48:57,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 430 transitions, 4553 flow [2024-11-20 17:48:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-20 17:48:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-20 17:48:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1443 transitions. [2024-11-20 17:48:57,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5153571428571428 [2024-11-20 17:48:57,100 INFO L175 Difference]: Start difference. First operand has 202 places, 194 transitions, 1876 flow. Second operand 35 states and 1443 transitions. [2024-11-20 17:48:57,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 430 transitions, 4553 flow [2024-11-20 17:48:57,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 430 transitions, 4540 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:48:57,442 INFO L231 Difference]: Finished difference. Result has 232 places, 219 transitions, 2432 flow [2024-11-20 17:48:57,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2432, PETRI_PLACES=232, PETRI_TRANSITIONS=219} [2024-11-20 17:48:57,443 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 153 predicate places. [2024-11-20 17:48:57,443 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 219 transitions, 2432 flow [2024-11-20 17:48:57,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 35.88461538461539) internal successors, (933), 26 states have internal predecessors, (933), 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) [2024-11-20 17:48:57,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:57,443 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:48:57,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0