./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:17:15,280 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:17:15,353 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:17:15,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:17:15,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:17:15,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:17:15,394 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:17:15,395 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:17:15,396 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:17:15,397 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:17:15,398 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:17:15,398 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:17:15,399 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:17:15,400 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:17:15,401 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:17:15,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:17:15,401 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:17:15,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:17:15,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:17:15,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:17:15,406 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:17:15,406 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:17:15,407 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:17:15,407 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:17:15,407 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:17:15,407 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:17:15,408 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:17:15,408 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:17:15,408 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:17:15,408 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:17:15,409 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:17:15,409 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:17:15,409 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:17:15,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:15,410 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:17:15,410 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:17:15,410 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:17:15,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:17:15,411 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:17:15,411 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:17:15,411 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:17:15,412 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:17:15,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-11-10 18:17:15,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:17:15,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:17:15,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:17:15,732 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:17:15,732 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:17:15,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-10 18:17:17,265 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:17:17,491 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:17:17,492 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-10 18:17:17,504 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/153ea5958/367250d4bb1b448d802a569cbc4b3fdf/FLAG9b2811020 [2024-11-10 18:17:17,858 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/153ea5958/367250d4bb1b448d802a569cbc4b3fdf [2024-11-10 18:17:17,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:17:17,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:17:17,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:17,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:17:17,871 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:17:17,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:17" (1/1) ... [2024-11-10 18:17:17,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da06ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:17, skipping insertion in model container [2024-11-10 18:17:17,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:17" (1/1) ... [2024-11-10 18:17:17,901 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:17:18,141 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:17:18,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:18,158 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:17:18,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:18,230 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:17:18,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18 WrapperNode [2024-11-10 18:17:18,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:18,232 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:18,232 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:17:18,232 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:17:18,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,252 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,286 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 333 [2024-11-10 18:17:18,287 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:18,288 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:17:18,288 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:17:18,288 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:17:18,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,305 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,333 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-10 18:17:18,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,344 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,352 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:17:18,353 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:17:18,353 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:17:18,353 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:17:18,357 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (1/1) ... [2024-11-10 18:17:18,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:18,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:18,404 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) [2024-11-10 18:17:18,406 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 [2024-11-10 18:17:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:17:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:17:18,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:17:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:17:18,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:17:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:17:18,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:17:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:17:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:17:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:17:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:17:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:17:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:17:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:17:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:17:18,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:17:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:17:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:17:18,458 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:17:18,569 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:17:18,571 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:17:19,123 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:17:19,123 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:17:19,542 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:17:19,542 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:17:19,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:19 BoogieIcfgContainer [2024-11-10 18:17:19,543 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:17:19,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:17:19,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:17:19,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:17:19,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:17:17" (1/3) ... [2024-11-10 18:17:19,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4142d016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:19, skipping insertion in model container [2024-11-10 18:17:19,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:18" (2/3) ... [2024-11-10 18:17:19,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4142d016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:19, skipping insertion in model container [2024-11-10 18:17:19,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:19" (3/3) ... [2024-11-10 18:17:19,554 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-11-10 18:17:19,574 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:17:19,575 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-10 18:17:19,575 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:17:19,647 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:17:19,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 97 transitions, 215 flow [2024-11-10 18:17:19,732 INFO L124 PetriNetUnfolderBase]: 20/94 cut-off events. [2024-11-10 18:17:19,732 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:17:19,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 20/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 246 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2024-11-10 18:17:19,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 97 transitions, 215 flow [2024-11-10 18:17:19,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 93 transitions, 204 flow [2024-11-10 18:17:19,753 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:17:19,761 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;@1216f763, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:17:19,762 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-10 18:17:19,765 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:17:19,766 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:17:19,766 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:17:19,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:19,766 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:17:19,767 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:19,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash 28758312, now seen corresponding path program 1 times [2024-11-10 18:17:19,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:19,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213567124] [2024-11-10 18:17:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:19,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:20,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:20,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213567124] [2024-11-10 18:17:20,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213567124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:20,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:20,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:17:20,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790778309] [2024-11-10 18:17:20,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:20,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:20,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:20,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-10 18:17:20,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 93 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:20,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:20,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-10 18:17:20,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:21,610 INFO L124 PetriNetUnfolderBase]: 7268/10576 cut-off events. [2024-11-10 18:17:21,611 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2024-11-10 18:17:21,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20392 conditions, 10576 events. 7268/10576 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 69792 event pairs, 5236 based on Foata normal form. 4/5698 useless extension candidates. Maximal degree in co-relation 19698. Up to 9450 conditions per place. [2024-11-10 18:17:21,707 INFO L140 encePairwiseOnDemand]: 85/97 looper letters, 54 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-11-10 18:17:21,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 82 transitions, 294 flow [2024-11-10 18:17:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-10 18:17:21,724 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5360824742268041 [2024-11-10 18:17:21,725 INFO L175 Difference]: Start difference. First operand has 83 places, 93 transitions, 204 flow. Second operand 3 states and 156 transitions. [2024-11-10 18:17:21,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 82 transitions, 294 flow [2024-11-10 18:17:21,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 282 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:17:21,745 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 174 flow [2024-11-10 18:17:21,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2024-11-10 18:17:21,752 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -9 predicate places. [2024-11-10 18:17:21,753 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 174 flow [2024-11-10 18:17:21,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:21,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:21,753 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:17:21,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:17:21,754 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:21,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:21,755 INFO L85 PathProgramCache]: Analyzing trace with hash 28758313, now seen corresponding path program 1 times [2024-11-10 18:17:21,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:21,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590477089] [2024-11-10 18:17:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:22,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590477089] [2024-11-10 18:17:22,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590477089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:22,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:22,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:22,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421967672] [2024-11-10 18:17:22,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:22,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:22,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:22,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:22,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-10 18:17:22,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-10 18:17:22,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:22,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-10 18:17:22,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:23,281 INFO L124 PetriNetUnfolderBase]: 7271/10591 cut-off events. [2024-11-10 18:17:23,282 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-11-10 18:17:23,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20198 conditions, 10591 events. 7271/10591 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 69649 event pairs, 5236 based on Foata normal form. 0/5706 useless extension candidates. Maximal degree in co-relation 20136. Up to 9463 conditions per place. [2024-11-10 18:17:23,417 INFO L140 encePairwiseOnDemand]: 84/97 looper letters, 58 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-10 18:17:23,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 330 flow [2024-11-10 18:17:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:17:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:17:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-10 18:17:23,421 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49226804123711343 [2024-11-10 18:17:23,421 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 174 flow. Second operand 4 states and 191 transitions. [2024-11-10 18:17:23,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 330 flow [2024-11-10 18:17:23,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:23,426 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 252 flow [2024-11-10 18:17:23,426 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2024-11-10 18:17:23,427 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -5 predicate places. [2024-11-10 18:17:23,427 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 252 flow [2024-11-10 18:17:23,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-10 18:17:23,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:23,428 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:17:23,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:17:23,428 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:23,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2041344198, now seen corresponding path program 1 times [2024-11-10 18:17:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858589384] [2024-11-10 18:17:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:23,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858589384] [2024-11-10 18:17:23,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858589384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928592540] [2024-11-10 18:17:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:23,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:23,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:23,770 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) [2024-11-10 18:17:23,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:17:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:23,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 18:17:23,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:23,949 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 [2024-11-10 18:17:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:24,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:24,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928592540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:24,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:24,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:17:24,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447615872] [2024-11-10 18:17:24,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:24,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:17:24,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:24,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:17:24,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:17:24,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-11-10 18:17:24,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 91 transitions, 252 flow. Second operand has 11 states, 11 states have (on average 28.363636363636363) internal successors, (312), 11 states have internal predecessors, (312), 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) [2024-11-10 18:17:24,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:24,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-11-10 18:17:24,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:25,724 INFO L124 PetriNetUnfolderBase]: 7271/10588 cut-off events. [2024-11-10 18:17:25,725 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-10 18:17:25,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20226 conditions, 10588 events. 7271/10588 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 70021 event pairs, 5236 based on Foata normal form. 0/5706 useless extension candidates. Maximal degree in co-relation 20159. Up to 9451 conditions per place. [2024-11-10 18:17:25,801 INFO L140 encePairwiseOnDemand]: 84/97 looper letters, 54 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-11-10 18:17:25,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 388 flow [2024-11-10 18:17:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:17:25,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:17:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 236 transitions. [2024-11-10 18:17:25,804 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4054982817869416 [2024-11-10 18:17:25,805 INFO L175 Difference]: Start difference. First operand has 78 places, 91 transitions, 252 flow. Second operand 6 states and 236 transitions. [2024-11-10 18:17:25,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 388 flow [2024-11-10 18:17:25,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 91 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:17:25,809 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 274 flow [2024-11-10 18:17:25,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-11-10 18:17:25,811 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -3 predicate places. [2024-11-10 18:17:25,811 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 274 flow [2024-11-10 18:17:25,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.363636363636363) internal successors, (312), 11 states have internal predecessors, (312), 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) [2024-11-10 18:17:25,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:25,812 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:25,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-10 18:17:26,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:26,018 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:26,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash -189202444, now seen corresponding path program 1 times [2024-11-10 18:17:26,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:26,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15681073] [2024-11-10 18:17:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:26,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:26,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:26,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15681073] [2024-11-10 18:17:26,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15681073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:26,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:26,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:17:26,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376171114] [2024-11-10 18:17:26,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:26,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:26,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:26,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-11-10 18:17:26,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2024-11-10 18:17:26,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:26,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-11-10 18:17:26,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:27,648 INFO L124 PetriNetUnfolderBase]: 12118/17674 cut-off events. [2024-11-10 18:17:27,649 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2024-11-10 18:17:27,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33774 conditions, 17674 events. 12118/17674 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 1339. Compared 122474 event pairs, 4256 based on Foata normal form. 356/10127 useless extension candidates. Maximal degree in co-relation 33694. Up to 9751 conditions per place. [2024-11-10 18:17:27,794 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 99 selfloop transitions, 3 changer transitions 0/125 dead transitions. [2024-11-10 18:17:27,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 556 flow [2024-11-10 18:17:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2024-11-10 18:17:27,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6804123711340206 [2024-11-10 18:17:27,797 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 274 flow. Second operand 3 states and 198 transitions. [2024-11-10 18:17:27,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 556 flow [2024-11-10 18:17:27,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 125 transitions, 506 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-10 18:17:27,801 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 253 flow [2024-11-10 18:17:27,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2024-11-10 18:17:27,802 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -6 predicate places. [2024-11-10 18:17:27,802 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 253 flow [2024-11-10 18:17:27,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2024-11-10 18:17:27,803 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:27,803 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:27,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:17:27,803 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:27,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1570306471, now seen corresponding path program 1 times [2024-11-10 18:17:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:27,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557226711] [2024-11-10 18:17:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:27,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:27,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557226711] [2024-11-10 18:17:27,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557226711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:27,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:27,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:27,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536511653] [2024-11-10 18:17:27,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:27,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:27,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:27,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 97 [2024-11-10 18:17:27,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-11-10 18:17:27,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:27,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 97 [2024-11-10 18:17:27,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:29,159 INFO L124 PetriNetUnfolderBase]: 15264/21898 cut-off events. [2024-11-10 18:17:29,160 INFO L125 PetriNetUnfolderBase]: For 1291/1315 co-relation queries the response was YES. [2024-11-10 18:17:29,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45036 conditions, 21898 events. 15264/21898 cut-off events. For 1291/1315 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 138964 event pairs, 5655 based on Foata normal form. 0/14472 useless extension candidates. Maximal degree in co-relation 10198. Up to 10528 conditions per place. [2024-11-10 18:17:29,288 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 100 selfloop transitions, 4 changer transitions 0/122 dead transitions. [2024-11-10 18:17:29,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 533 flow [2024-11-10 18:17:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2024-11-10 18:17:29,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6116838487972509 [2024-11-10 18:17:29,290 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 253 flow. Second operand 3 states and 178 transitions. [2024-11-10 18:17:29,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 533 flow [2024-11-10 18:17:29,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:29,297 INFO L231 Difference]: Finished difference. Result has 80 places, 91 transitions, 272 flow [2024-11-10 18:17:29,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=80, PETRI_TRANSITIONS=91} [2024-11-10 18:17:29,300 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -3 predicate places. [2024-11-10 18:17:29,300 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 91 transitions, 272 flow [2024-11-10 18:17:29,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-11-10 18:17:29,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:29,302 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:29,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:17:29,302 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:29,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2051718123, now seen corresponding path program 1 times [2024-11-10 18:17:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:29,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499326180] [2024-11-10 18:17:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:29,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:29,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:29,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499326180] [2024-11-10 18:17:29,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499326180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:29,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:29,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:29,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817196523] [2024-11-10 18:17:29,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:29,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:29,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-11-10 18:17:29,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 91 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2024-11-10 18:17:29,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:29,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-11-10 18:17:29,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:31,480 INFO L124 PetriNetUnfolderBase]: 19162/28525 cut-off events. [2024-11-10 18:17:31,480 INFO L125 PetriNetUnfolderBase]: For 4975/5139 co-relation queries the response was YES. [2024-11-10 18:17:31,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60785 conditions, 28525 events. 19162/28525 cut-off events. For 4975/5139 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 195434 event pairs, 7868 based on Foata normal form. 477/19464 useless extension candidates. Maximal degree in co-relation 17559. Up to 12927 conditions per place. [2024-11-10 18:17:31,654 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 105 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2024-11-10 18:17:31,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 131 transitions, 594 flow [2024-11-10 18:17:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2024-11-10 18:17:31,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6804123711340206 [2024-11-10 18:17:31,658 INFO L175 Difference]: Start difference. First operand has 80 places, 91 transitions, 272 flow. Second operand 3 states and 198 transitions. [2024-11-10 18:17:31,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 131 transitions, 594 flow [2024-11-10 18:17:31,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 131 transitions, 582 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:31,669 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 280 flow [2024-11-10 18:17:31,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2024-11-10 18:17:31,671 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -2 predicate places. [2024-11-10 18:17:31,671 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 280 flow [2024-11-10 18:17:31,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2024-11-10 18:17:31,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:31,671 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:31,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:17:31,671 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:31,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash -821245606, now seen corresponding path program 1 times [2024-11-10 18:17:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:31,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281179592] [2024-11-10 18:17:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:31,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:31,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:31,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281179592] [2024-11-10 18:17:31,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281179592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:31,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:31,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:31,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503587028] [2024-11-10 18:17:31,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:31,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:31,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:31,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:31,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-10 18:17:31,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 92 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:31,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:31,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-10 18:17:31,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:33,706 INFO L124 PetriNetUnfolderBase]: 23770/34283 cut-off events. [2024-11-10 18:17:33,706 INFO L125 PetriNetUnfolderBase]: For 4341/4755 co-relation queries the response was YES. [2024-11-10 18:17:33,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73075 conditions, 34283 events. 23770/34283 cut-off events. For 4341/4755 co-relation queries the response was YES. Maximal size of possible extension queue 1434. Compared 225231 event pairs, 11883 based on Foata normal form. 0/23406 useless extension candidates. Maximal degree in co-relation 25449. Up to 20204 conditions per place. [2024-11-10 18:17:34,133 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 102 selfloop transitions, 4 changer transitions 0/127 dead transitions. [2024-11-10 18:17:34,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 127 transitions, 583 flow [2024-11-10 18:17:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2024-11-10 18:17:34,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6391752577319587 [2024-11-10 18:17:34,136 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 280 flow. Second operand 3 states and 186 transitions. [2024-11-10 18:17:34,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 127 transitions, 583 flow [2024-11-10 18:17:34,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 127 transitions, 581 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:34,142 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 296 flow [2024-11-10 18:17:34,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-11-10 18:17:34,143 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2024-11-10 18:17:34,143 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 296 flow [2024-11-10 18:17:34,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:34,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:34,144 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:34,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:17:34,145 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:34,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:34,145 INFO L85 PathProgramCache]: Analyzing trace with hash -951878954, now seen corresponding path program 1 times [2024-11-10 18:17:34,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:34,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144217075] [2024-11-10 18:17:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:34,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:34,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:34,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144217075] [2024-11-10 18:17:34,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144217075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:34,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:34,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:34,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351542009] [2024-11-10 18:17:34,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:34,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:34,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:34,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-10 18:17:34,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:34,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:34,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-10 18:17:34,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:36,629 INFO L124 PetriNetUnfolderBase]: 21339/31743 cut-off events. [2024-11-10 18:17:36,630 INFO L125 PetriNetUnfolderBase]: For 8805/9507 co-relation queries the response was YES. [2024-11-10 18:17:36,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70219 conditions, 31743 events. 21339/31743 cut-off events. For 8805/9507 co-relation queries the response was YES. Maximal size of possible extension queue 1387. Compared 213934 event pairs, 16426 based on Foata normal form. 112/21832 useless extension candidates. Maximal degree in co-relation 42155. Up to 26826 conditions per place. [2024-11-10 18:17:36,822 INFO L140 encePairwiseOnDemand]: 90/97 looper letters, 106 selfloop transitions, 4 changer transitions 0/132 dead transitions. [2024-11-10 18:17:36,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 132 transitions, 628 flow [2024-11-10 18:17:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 249 transitions. [2024-11-10 18:17:36,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51340206185567 [2024-11-10 18:17:36,828 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 296 flow. Second operand 5 states and 249 transitions. [2024-11-10 18:17:36,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 132 transitions, 628 flow [2024-11-10 18:17:36,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 132 transitions, 620 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:36,849 INFO L231 Difference]: Finished difference. Result has 88 places, 93 transitions, 310 flow [2024-11-10 18:17:36,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=88, PETRI_TRANSITIONS=93} [2024-11-10 18:17:36,851 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 5 predicate places. [2024-11-10 18:17:36,851 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 93 transitions, 310 flow [2024-11-10 18:17:36,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:36,853 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:36,853 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] [2024-11-10 18:17:36,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:17:36,853 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:36,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 556525535, now seen corresponding path program 1 times [2024-11-10 18:17:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:36,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520872550] [2024-11-10 18:17:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:36,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520872550] [2024-11-10 18:17:36,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520872550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:36,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:36,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696288073] [2024-11-10 18:17:36,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:36,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:36,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:36,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:36,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-10 18:17:36,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 93 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:36,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:36,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-10 18:17:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:40,943 INFO L124 PetriNetUnfolderBase]: 37219/53395 cut-off events. [2024-11-10 18:17:40,944 INFO L125 PetriNetUnfolderBase]: For 12420/13604 co-relation queries the response was YES. [2024-11-10 18:17:41,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119853 conditions, 53395 events. 37219/53395 cut-off events. For 12420/13604 co-relation queries the response was YES. Maximal size of possible extension queue 2220. Compared 357062 event pairs, 21948 based on Foata normal form. 0/36591 useless extension candidates. Maximal degree in co-relation 117468. Up to 24971 conditions per place. [2024-11-10 18:17:41,255 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 102 selfloop transitions, 5 changer transitions 0/130 dead transitions. [2024-11-10 18:17:41,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 130 transitions, 633 flow [2024-11-10 18:17:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2024-11-10 18:17:41,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6391752577319587 [2024-11-10 18:17:41,257 INFO L175 Difference]: Start difference. First operand has 88 places, 93 transitions, 310 flow. Second operand 3 states and 186 transitions. [2024-11-10 18:17:41,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 130 transitions, 633 flow [2024-11-10 18:17:41,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 130 transitions, 629 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:41,270 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 332 flow [2024-11-10 18:17:41,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2024-11-10 18:17:41,272 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 8 predicate places. [2024-11-10 18:17:41,272 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 332 flow [2024-11-10 18:17:41,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:41,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:41,272 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] [2024-11-10 18:17:41,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:17:41,273 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:41,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1242493543, now seen corresponding path program 1 times [2024-11-10 18:17:41,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:41,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719315201] [2024-11-10 18:17:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:41,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:17:41,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:41,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719315201] [2024-11-10 18:17:41,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719315201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:41,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:41,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:41,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49257945] [2024-11-10 18:17:41,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:41,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:41,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:41,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:41,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-10 18:17:41,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2024-11-10 18:17:41,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:41,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-10 18:17:41,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:44,491 INFO L124 PetriNetUnfolderBase]: 24142/36426 cut-off events. [2024-11-10 18:17:44,491 INFO L125 PetriNetUnfolderBase]: For 13754/15238 co-relation queries the response was YES. [2024-11-10 18:17:44,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82512 conditions, 36426 events. 24142/36426 cut-off events. For 13754/15238 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 255268 event pairs, 19281 based on Foata normal form. 0/27027 useless extension candidates. Maximal degree in co-relation 80359. Up to 32003 conditions per place. [2024-11-10 18:17:44,676 INFO L140 encePairwiseOnDemand]: 90/97 looper letters, 58 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2024-11-10 18:17:44,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 444 flow [2024-11-10 18:17:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 206 transitions. [2024-11-10 18:17:44,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4247422680412371 [2024-11-10 18:17:44,678 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 332 flow. Second operand 5 states and 206 transitions. [2024-11-10 18:17:44,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 444 flow [2024-11-10 18:17:44,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:44,691 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 318 flow [2024-11-10 18:17:44,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-11-10 18:17:44,692 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 6 predicate places. [2024-11-10 18:17:44,692 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 318 flow [2024-11-10 18:17:44,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2024-11-10 18:17:44,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:44,692 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] [2024-11-10 18:17:44,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:17:44,693 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:44,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:44,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1242493542, now seen corresponding path program 1 times [2024-11-10 18:17:44,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:44,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188697552] [2024-11-10 18:17:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:44,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188697552] [2024-11-10 18:17:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188697552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:45,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:45,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:17:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032057243] [2024-11-10 18:17:45,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:45,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 18:17:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 18:17:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-10 18:17:45,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-11-10 18:17:45,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 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) [2024-11-10 18:17:45,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:45,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-11-10 18:17:45,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:47,419 INFO L124 PetriNetUnfolderBase]: 18925/28925 cut-off events. [2024-11-10 18:17:47,419 INFO L125 PetriNetUnfolderBase]: For 9003/10251 co-relation queries the response was YES. [2024-11-10 18:17:47,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63282 conditions, 28925 events. 18925/28925 cut-off events. For 9003/10251 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 197341 event pairs, 14916 based on Foata normal form. 1455/22689 useless extension candidates. Maximal degree in co-relation 61120. Up to 25030 conditions per place. [2024-11-10 18:17:47,595 INFO L140 encePairwiseOnDemand]: 91/97 looper letters, 60 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2024-11-10 18:17:47,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 430 flow [2024-11-10 18:17:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:17:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:17:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-11-10 18:17:47,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42010309278350516 [2024-11-10 18:17:47,597 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 318 flow. Second operand 4 states and 163 transitions. [2024-11-10 18:17:47,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 430 flow [2024-11-10 18:17:47,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 86 transitions, 422 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:47,607 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 302 flow [2024-11-10 18:17:47,607 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-11-10 18:17:47,608 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 2 predicate places. [2024-11-10 18:17:47,608 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 302 flow [2024-11-10 18:17:47,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 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) [2024-11-10 18:17:47,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:47,609 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:47,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:17:47,609 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:47,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:47,610 INFO L85 PathProgramCache]: Analyzing trace with hash -949293739, now seen corresponding path program 1 times [2024-11-10 18:17:47,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:47,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205034326] [2024-11-10 18:17:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:47,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-10 18:17:47,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205034326] [2024-11-10 18:17:47,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205034326] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:47,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:47,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:47,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838822023] [2024-11-10 18:17:47,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:47,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:47,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:47,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:47,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-11-10 18:17:47,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2024-11-10 18:17:47,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:47,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-11-10 18:17:47,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:50,411 INFO L124 PetriNetUnfolderBase]: 24421/36166 cut-off events. [2024-11-10 18:17:50,412 INFO L125 PetriNetUnfolderBase]: For 12748/15029 co-relation queries the response was YES. [2024-11-10 18:17:50,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81556 conditions, 36166 events. 24421/36166 cut-off events. For 12748/15029 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 232547 event pairs, 8589 based on Foata normal form. 732/28111 useless extension candidates. Maximal degree in co-relation 79400. Up to 23607 conditions per place. [2024-11-10 18:17:50,587 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 88 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-11-10 18:17:50,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 575 flow [2024-11-10 18:17:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-10 18:17:50,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6185567010309279 [2024-11-10 18:17:50,589 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 302 flow. Second operand 3 states and 180 transitions. [2024-11-10 18:17:50,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 575 flow [2024-11-10 18:17:50,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 571 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:50,598 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 316 flow [2024-11-10 18:17:50,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-11-10 18:17:50,599 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 3 predicate places. [2024-11-10 18:17:50,599 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 316 flow [2024-11-10 18:17:50,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2024-11-10 18:17:50,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:50,599 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] [2024-11-10 18:17:50,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:17:50,600 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:50,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash -66197760, now seen corresponding path program 1 times [2024-11-10 18:17:50,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:50,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043121152] [2024-11-10 18:17:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:50,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:50,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:50,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043121152] [2024-11-10 18:17:50,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043121152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:50,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:50,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:50,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219947428] [2024-11-10 18:17:50,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:50,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:50,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:50,671 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-11-10 18:17:50,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-11-10 18:17:50,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:50,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-11-10 18:17:50,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:53,618 INFO L124 PetriNetUnfolderBase]: 24431/36238 cut-off events. [2024-11-10 18:17:53,618 INFO L125 PetriNetUnfolderBase]: For 15824/18123 co-relation queries the response was YES. [2024-11-10 18:17:53,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84120 conditions, 36238 events. 24431/36238 cut-off events. For 15824/18123 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 234198 event pairs, 8400 based on Foata normal form. 3/27368 useless extension candidates. Maximal degree in co-relation 81966. Up to 29833 conditions per place. [2024-11-10 18:17:53,833 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 71 selfloop transitions, 2 changer transitions 6/105 dead transitions. [2024-11-10 18:17:53,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 519 flow [2024-11-10 18:17:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2024-11-10 18:17:53,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.570446735395189 [2024-11-10 18:17:53,835 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 316 flow. Second operand 3 states and 166 transitions. [2024-11-10 18:17:53,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 519 flow [2024-11-10 18:17:53,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 105 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:53,843 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 319 flow [2024-11-10 18:17:53,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-10 18:17:53,844 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 5 predicate places. [2024-11-10 18:17:53,844 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 319 flow [2024-11-10 18:17:53,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-11-10 18:17:53,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:53,845 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:53,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:17:53,845 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:53,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:53,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1447454233, now seen corresponding path program 1 times [2024-11-10 18:17:53,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:53,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416045775] [2024-11-10 18:17:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:53,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-10 18:17:53,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:53,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416045775] [2024-11-10 18:17:53,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416045775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:53,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:53,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:17:53,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249031715] [2024-11-10 18:17:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:53,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:53,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:53,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:53,959 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-10 18:17:53,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-11-10 18:17:53,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:53,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-10 18:17:53,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:56,419 INFO L124 PetriNetUnfolderBase]: 20687/30947 cut-off events. [2024-11-10 18:17:56,419 INFO L125 PetriNetUnfolderBase]: For 16330/18355 co-relation queries the response was YES. [2024-11-10 18:17:56,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72046 conditions, 30947 events. 20687/30947 cut-off events. For 16330/18355 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 203132 event pairs, 16143 based on Foata normal form. 0/24316 useless extension candidates. Maximal degree in co-relation 72005. Up to 27584 conditions per place. [2024-11-10 18:17:56,650 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 55 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2024-11-10 18:17:56,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 429 flow [2024-11-10 18:17:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:17:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:17:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2024-11-10 18:17:56,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4329896907216495 [2024-11-10 18:17:56,652 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 319 flow. Second operand 4 states and 168 transitions. [2024-11-10 18:17:56,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 429 flow [2024-11-10 18:17:56,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 425 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:56,662 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 315 flow [2024-11-10 18:17:56,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=315, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2024-11-10 18:17:56,663 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 2 predicate places. [2024-11-10 18:17:56,663 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 315 flow [2024-11-10 18:17:56,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-11-10 18:17:56,663 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:56,663 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:56,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 18:17:56,664 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:17:56,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1447454232, now seen corresponding path program 1 times [2024-11-10 18:17:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:56,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762951949] [2024-11-10 18:17:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:56,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-10 18:17:56,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762951949] [2024-11-10 18:17:56,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762951949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:56,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:56,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:17:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105987997] [2024-11-10 18:17:56,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:56,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:56,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-10 18:17:56,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2024-11-10 18:17:56,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:56,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-10 18:17:56,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:00,187 INFO L124 PetriNetUnfolderBase]: 26934/40845 cut-off events. [2024-11-10 18:18:00,188 INFO L125 PetriNetUnfolderBase]: For 19974/22437 co-relation queries the response was YES. [2024-11-10 18:18:00,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93676 conditions, 40845 events. 26934/40845 cut-off events. For 19974/22437 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 278126 event pairs, 21455 based on Foata normal form. 340/32281 useless extension candidates. Maximal degree in co-relation 93634. Up to 27588 conditions per place. [2024-11-10 18:18:00,453 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 88 selfloop transitions, 9 changer transitions 0/120 dead transitions. [2024-11-10 18:18:00,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 120 transitions, 627 flow [2024-11-10 18:18:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:18:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:18:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2024-11-10 18:18:00,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49896907216494846 [2024-11-10 18:18:00,455 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 315 flow. Second operand 5 states and 242 transitions. [2024-11-10 18:18:00,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 120 transitions, 627 flow [2024-11-10 18:18:00,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 623 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:18:00,466 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 346 flow [2024-11-10 18:18:00,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2024-11-10 18:18:00,467 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 6 predicate places. [2024-11-10 18:18:00,468 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 346 flow [2024-11-10 18:18:00,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2024-11-10 18:18:00,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:00,468 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:00,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 18:18:00,469 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:18:00,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash 565950028, now seen corresponding path program 1 times [2024-11-10 18:18:00,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:00,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144550046] [2024-11-10 18:18:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:00,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:00,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:00,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144550046] [2024-11-10 18:18:00,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144550046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:00,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:00,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:18:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953277452] [2024-11-10 18:18:00,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:00,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:18:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:18:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:18:00,530 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 97 [2024-11-10 18:18:00,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2024-11-10 18:18:00,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:00,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 97 [2024-11-10 18:18:00,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:04,083 INFO L124 PetriNetUnfolderBase]: 29449/42299 cut-off events. [2024-11-10 18:18:04,084 INFO L125 PetriNetUnfolderBase]: For 20182/22541 co-relation queries the response was YES. [2024-11-10 18:18:04,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100536 conditions, 42299 events. 29449/42299 cut-off events. For 20182/22541 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 249872 event pairs, 15757 based on Foata normal form. 474/35686 useless extension candidates. Maximal degree in co-relation 100492. Up to 26799 conditions per place. [2024-11-10 18:18:04,346 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 84 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2024-11-10 18:18:04,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 110 transitions, 601 flow [2024-11-10 18:18:04,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:18:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:18:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-11-10 18:18:04,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5567010309278351 [2024-11-10 18:18:04,348 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 346 flow. Second operand 3 states and 162 transitions. [2024-11-10 18:18:04,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 110 transitions, 601 flow [2024-11-10 18:18:04,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 110 transitions, 590 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 18:18:04,359 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 363 flow [2024-11-10 18:18:04,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=363, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2024-11-10 18:18:04,360 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 8 predicate places. [2024-11-10 18:18:04,360 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 363 flow [2024-11-10 18:18:04,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2024-11-10 18:18:04,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:04,361 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:04,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 18:18:04,361 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-10 18:18:04,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash 44681519, now seen corresponding path program 1 times [2024-11-10 18:18:04,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:04,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418738720] [2024-11-10 18:18:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:04,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-10 18:18:04,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:04,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418738720] [2024-11-10 18:18:04,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418738720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:04,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072646518] [2024-11-10 18:18:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:04,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:04,623 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) [2024-11-10 18:18:04,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:18:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:04,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:18:04,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-10 18:18:04,905 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:18:04,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072646518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:04,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:18:04,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-10 18:18:04,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209948683] [2024-11-10 18:18:04,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:04,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:18:04,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:04,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:18:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-10 18:18:04,956 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-10 18:18:04,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 363 flow. Second operand has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 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) [2024-11-10 18:18:04,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:04,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-10 18:18:04,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand