./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/11_fmaxsymopt-zero.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d 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/pthread-ext/11_fmaxsymopt-zero.i -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 44a70169ef8abd67c211072db1308f16df00422231dd8f14aa88bc39d0b023bb --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:23:19,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:23:19,432 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:23:19,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:23:19,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:23:19,453 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:23:19,453 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:23:19,454 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:23:19,454 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:23:19,454 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:23:19,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:23:19,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:23:19,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:23:19,456 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:23:19,456 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:23:19,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:23:19,457 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:23:19,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:23:19,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:23:19,458 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:23:19,461 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:23:19,461 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:23:19,462 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:23:19,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:23:19,462 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:23:19,462 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:23:19,462 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:23:19,463 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:23:19,463 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:23:19,463 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:23:19,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:23:19,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:23:19,464 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:23:19,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:23:19,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:23:19,465 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:23:19,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:23:19,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:23:19,470 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:23:19,470 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:23:19,470 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:23:19,470 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:23:19,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44a70169ef8abd67c211072db1308f16df00422231dd8f14aa88bc39d0b023bb [2024-11-09 10:23:19,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:23:19,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:23:19,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:23:19,768 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:23:19,768 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:23:19,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/11_fmaxsymopt-zero.i [2024-11-09 10:23:21,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:23:21,426 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:23:21,427 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-zero.i [2024-11-09 10:23:21,439 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142a1cd8d/78226a68c4f840ed8e8fb8b76b68b40d/FLAGd7eee1527 [2024-11-09 10:23:21,804 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142a1cd8d/78226a68c4f840ed8e8fb8b76b68b40d [2024-11-09 10:23:21,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:23:21,811 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:23:21,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:23:21,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:23:21,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:23:21,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:23:21" (1/1) ... [2024-11-09 10:23:21,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b08fa1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:21, skipping insertion in model container [2024-11-09 10:23:21,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:23:21" (1/1) ... [2024-11-09 10:23:21,849 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:23:22,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:23:22,366 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:23:22,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:23:22,451 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:23:22,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22 WrapperNode [2024-11-09 10:23:22,452 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:23:22,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:23:22,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:23:22,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:23:22,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,488 INFO L138 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2024-11-09 10:23:22,489 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:23:22,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:23:22,490 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:23:22,490 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:23:22,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,498 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,500 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,514 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 0 writes are split as follows [0, 0, 0]. [2024-11-09 10:23:22,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,553 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:23:22,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:23:22,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:23:22,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:23:22,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (1/1) ... [2024-11-09 10:23:22,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:23:22,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:23:22,588 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) [2024-11-09 10:23:22,595 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 [2024-11-09 10:23:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:23:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:23:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 10:23:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-09 10:23:22,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-09 10:23:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 10:23:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:23:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:23:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:23:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 10:23:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 10:23:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:23:22,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:23:22,648 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:23:22,765 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:23:22,766 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:23:22,899 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:23:22,899 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:23:23,036 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:23:23,036 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 10:23:23,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:23:23 BoogieIcfgContainer [2024-11-09 10:23:23,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:23:23,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:23:23,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:23:23,041 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:23:23,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:23:21" (1/3) ... [2024-11-09 10:23:23,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659c9178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:23:23, skipping insertion in model container [2024-11-09 10:23:23,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:23:22" (2/3) ... [2024-11-09 10:23:23,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659c9178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:23:23, skipping insertion in model container [2024-11-09 10:23:23,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:23:23" (3/3) ... [2024-11-09 10:23:23,044 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt-zero.i [2024-11-09 10:23:23,056 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:23:23,057 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-11-09 10:23:23,057 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:23:23,088 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 10:23:23,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 29 transitions, 62 flow [2024-11-09 10:23:23,141 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-09 10:23:23,141 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:23:23,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 33 events. 4/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 63 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-09 10:23:23,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 29 transitions, 62 flow [2024-11-09 10:23:23,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 29 transitions, 62 flow [2024-11-09 10:23:23,157 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:23:23,162 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;@47cc6d3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:23:23,162 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-09 10:23:23,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:23:23,169 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-09 10:23:23,169 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:23:23,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:23,170 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:23:23,170 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2024-11-09 10:23:23,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash 267968, now seen corresponding path program 1 times [2024-11-09 10:23:23,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:23,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134365757] [2024-11-09 10:23:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:23,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:23,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:23,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134365757] [2024-11-09 10:23:23,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134365757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:23,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:23,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:23:23,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748270712] [2024-11-09 10:23:23,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:23,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 10:23:23,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 10:23:23,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 10:23:23,383 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-09 10:23:23,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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) [2024-11-09 10:23:23,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:23,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-09 10:23:23,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:23,472 INFO L124 PetriNetUnfolderBase]: 18/68 cut-off events. [2024-11-09 10:23:23,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:23:23,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 68 events. 18/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 182 event pairs, 14 based on Foata normal form. 6/69 useless extension candidates. Maximal degree in co-relation 102. Up to 44 conditions per place. [2024-11-09 10:23:23,476 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 12 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-09 10:23:23,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 74 flow [2024-11-09 10:23:23,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 10:23:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-09 10:23:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-11-09 10:23:23,485 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6724137931034483 [2024-11-09 10:23:23,486 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 62 flow. Second operand 2 states and 39 transitions. [2024-11-09 10:23:23,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 74 flow [2024-11-09 10:23:23,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:23:23,490 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2024-11-09 10:23:23,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2024-11-09 10:23:23,495 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-11-09 10:23:23,495 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2024-11-09 10:23:23,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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) [2024-11-09 10:23:23,496 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:23,496 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:23:23,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:23:23,497 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2024-11-09 10:23:23,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash -606227341, now seen corresponding path program 1 times [2024-11-09 10:23:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764925511] [2024-11-09 10:23:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 10:23:23,534 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 10:23:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 10:23:23,584 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 10:23:23,585 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 10:23:23,587 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-09 10:23:23,591 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-11-09 10:23:23,591 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-11-09 10:23:23,591 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2024-11-09 10:23:23,591 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2024-11-09 10:23:23,592 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2024-11-09 10:23:23,592 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2024-11-09 10:23:23,593 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-11-09 10:23:23,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:23:23,593 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-09 10:23:23,596 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 10:23:23,596 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-09 10:23:23,630 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 10:23:23,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 51 transitions, 112 flow [2024-11-09 10:23:23,650 INFO L124 PetriNetUnfolderBase]: 8/60 cut-off events. [2024-11-09 10:23:23,650 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:23:23,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 60 events. 8/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 167 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-11-09 10:23:23,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 51 transitions, 112 flow [2024-11-09 10:23:23,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 51 transitions, 112 flow [2024-11-09 10:23:23,654 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:23:23,655 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;@47cc6d3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:23:23,656 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-09 10:23:23,657 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:23:23,658 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-09 10:23:23,658 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:23:23,658 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:23,658 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:23:23,658 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-11-09 10:23:23,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash 318611, now seen corresponding path program 1 times [2024-11-09 10:23:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:23,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015603387] [2024-11-09 10:23:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:23,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:23,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:23,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015603387] [2024-11-09 10:23:23,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015603387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:23,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:23,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:23:23,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41354620] [2024-11-09 10:23:23,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:23,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 10:23:23,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 10:23:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 10:23:23,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 51 [2024-11-09 10:23:23,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 51 transitions, 112 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 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) [2024-11-09 10:23:23,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:23,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 51 [2024-11-09 10:23:23,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:23,852 INFO L124 PetriNetUnfolderBase]: 361/865 cut-off events. [2024-11-09 10:23:23,852 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-09 10:23:23,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 865 events. 361/865 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5173 event pairs, 294 based on Foata normal form. 140/940 useless extension candidates. Maximal degree in co-relation 778. Up to 564 conditions per place. [2024-11-09 10:23:23,859 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 21 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2024-11-09 10:23:23,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 136 flow [2024-11-09 10:23:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 10:23:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-09 10:23:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 70 transitions. [2024-11-09 10:23:23,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2024-11-09 10:23:23,860 INFO L175 Difference]: Start difference. First operand has 48 places, 51 transitions, 112 flow. Second operand 2 states and 70 transitions. [2024-11-09 10:23:23,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 136 flow [2024-11-09 10:23:23,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:23:23,862 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 94 flow [2024-11-09 10:23:23,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-11-09 10:23:23,862 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2024-11-09 10:23:23,863 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 94 flow [2024-11-09 10:23:23,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 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) [2024-11-09 10:23:23,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:23,863 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:23:23,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:23:23,863 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-11-09 10:23:23,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:23,863 INFO L85 PathProgramCache]: Analyzing trace with hash 903193000, now seen corresponding path program 1 times [2024-11-09 10:23:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:23,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177272464] [2024-11-09 10:23:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:23,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:23,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:23,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177272464] [2024-11-09 10:23:23,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177272464] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:23,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:23,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:23:23,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694290359] [2024-11-09 10:23:23,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:23,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:23:23,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:23,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:23:23,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:23:23,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 51 [2024-11-09 10:23:23,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2024-11-09 10:23:23,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:23,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 51 [2024-11-09 10:23:23,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:24,096 INFO L124 PetriNetUnfolderBase]: 361/849 cut-off events. [2024-11-09 10:23:24,096 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-09 10:23:24,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 849 events. 361/849 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4984 event pairs, 294 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 1438. Up to 563 conditions per place. [2024-11-09 10:23:24,101 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 20 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2024-11-09 10:23:24,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 132 flow [2024-11-09 10:23:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:23:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:23:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-11-09 10:23:24,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5424836601307189 [2024-11-09 10:23:24,103 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 94 flow. Second operand 3 states and 83 transitions. [2024-11-09 10:23:24,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 132 flow [2024-11-09 10:23:24,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:23:24,104 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 92 flow [2024-11-09 10:23:24,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-11-09 10:23:24,105 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2024-11-09 10:23:24,105 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 92 flow [2024-11-09 10:23:24,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2024-11-09 10:23:24,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:24,105 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:23:24,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:23:24,106 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-11-09 10:23:24,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:24,106 INFO L85 PathProgramCache]: Analyzing trace with hash 903193001, now seen corresponding path program 1 times [2024-11-09 10:23:24,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:24,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243133619] [2024-11-09 10:23:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:24,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:24,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243133619] [2024-11-09 10:23:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243133619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:24,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:24,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:23:24,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152168688] [2024-11-09 10:23:24,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:24,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:23:24,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:23:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:23:24,377 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2024-11-09 10:23:24,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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) [2024-11-09 10:23:24,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:24,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2024-11-09 10:23:24,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:24,573 INFO L124 PetriNetUnfolderBase]: 477/1311 cut-off events. [2024-11-09 10:23:24,573 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-09 10:23:24,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2126 conditions, 1311 events. 477/1311 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9387 event pairs, 258 based on Foata normal form. 27/1262 useless extension candidates. Maximal degree in co-relation 2120. Up to 563 conditions per place. [2024-11-09 10:23:24,581 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 41 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-11-09 10:23:24,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 242 flow [2024-11-09 10:23:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:23:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:23:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-11-09 10:23:24,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-09 10:23:24,585 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 92 flow. Second operand 5 states and 153 transitions. [2024-11-09 10:23:24,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 242 flow [2024-11-09 10:23:24,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:23:24,587 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 118 flow [2024-11-09 10:23:24,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-09 10:23:24,589 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2024-11-09 10:23:24,589 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 118 flow [2024-11-09 10:23:24,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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) [2024-11-09 10:23:24,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:24,590 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-09 10:23:24,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:23:24,590 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-11-09 10:23:24,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:24,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2092663819, now seen corresponding path program 1 times [2024-11-09 10:23:24,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:24,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712401020] [2024-11-09 10:23:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:24,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 10:23:24,605 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 10:23:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 10:23:24,636 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 10:23:24,638 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 10:23:24,639 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2024-11-09 10:23:24,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2024-11-09 10:23:24,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2024-11-09 10:23:24,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 11 remaining) [2024-11-09 10:23:24,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2024-11-09 10:23:24,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2024-11-09 10:23:24,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2024-11-09 10:23:24,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2024-11-09 10:23:24,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2024-11-09 10:23:24,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2024-11-09 10:23:24,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2024-11-09 10:23:24,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:23:24,641 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-09 10:23:24,642 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 10:23:24,643 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-09 10:23:24,670 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 10:23:24,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 73 transitions, 164 flow [2024-11-09 10:23:24,678 INFO L124 PetriNetUnfolderBase]: 12/87 cut-off events. [2024-11-09 10:23:24,678 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-09 10:23:24,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 87 events. 12/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 293 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2024-11-09 10:23:24,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 73 transitions, 164 flow [2024-11-09 10:23:24,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 73 transitions, 164 flow [2024-11-09 10:23:24,680 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:23:24,681 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;@47cc6d3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:23:24,681 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-09 10:23:24,682 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:23:24,682 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-09 10:23:24,682 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:23:24,682 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:24,682 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:23:24,682 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-09 10:23:24,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash 391100, now seen corresponding path program 1 times [2024-11-09 10:23:24,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:24,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017318408] [2024-11-09 10:23:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:24,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:24,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:24,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017318408] [2024-11-09 10:23:24,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017318408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:24,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:24,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:23:24,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994886337] [2024-11-09 10:23:24,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:24,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 10:23:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 10:23:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 10:23:24,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 73 [2024-11-09 10:23:24,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 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) [2024-11-09 10:23:24,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:24,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 73 [2024-11-09 10:23:24,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:25,396 INFO L124 PetriNetUnfolderBase]: 4643/8805 cut-off events. [2024-11-09 10:23:25,396 INFO L125 PetriNetUnfolderBase]: For 490/490 co-relation queries the response was YES. [2024-11-09 10:23:25,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15351 conditions, 8805 events. 4643/8805 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 69408 event pairs, 3878 based on Foata normal form. 1869/10115 useless extension candidates. Maximal degree in co-relation 1471. Up to 6260 conditions per place. [2024-11-09 10:23:25,446 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 30 selfloop transitions, 0 changer transitions 0/61 dead transitions. [2024-11-09 10:23:25,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 200 flow [2024-11-09 10:23:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 10:23:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-09 10:23:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2024-11-09 10:23:25,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6917808219178082 [2024-11-09 10:23:25,449 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 164 flow. Second operand 2 states and 101 transitions. [2024-11-09 10:23:25,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 200 flow [2024-11-09 10:23:25,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 198 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-09 10:23:25,452 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 138 flow [2024-11-09 10:23:25,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-11-09 10:23:25,453 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2024-11-09 10:23:25,454 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 138 flow [2024-11-09 10:23:25,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 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) [2024-11-09 10:23:25,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:25,454 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:23:25,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:23:25,455 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-09 10:23:25,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1231556397, now seen corresponding path program 1 times [2024-11-09 10:23:25,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:25,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014771943] [2024-11-09 10:23:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:25,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014771943] [2024-11-09 10:23:25,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014771943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:25,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:25,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:23:25,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405819316] [2024-11-09 10:23:25,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:25,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:23:25,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:23:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:23:25,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 73 [2024-11-09 10:23:25,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2024-11-09 10:23:25,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:25,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 73 [2024-11-09 10:23:25,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:26,156 INFO L124 PetriNetUnfolderBase]: 4643/8667 cut-off events. [2024-11-09 10:23:26,158 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2024-11-09 10:23:26,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15150 conditions, 8667 events. 4643/8667 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 66987 event pairs, 3878 based on Foata normal form. 0/8246 useless extension candidates. Maximal degree in co-relation 15144. Up to 6259 conditions per place. [2024-11-09 10:23:26,209 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 29 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2024-11-09 10:23:26,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 192 flow [2024-11-09 10:23:26,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:23:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:23:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-11-09 10:23:26,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.547945205479452 [2024-11-09 10:23:26,215 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 138 flow. Second operand 3 states and 120 transitions. [2024-11-09 10:23:26,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 192 flow [2024-11-09 10:23:26,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:23:26,217 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 134 flow [2024-11-09 10:23:26,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-11-09 10:23:26,218 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2024-11-09 10:23:26,218 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 134 flow [2024-11-09 10:23:26,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2024-11-09 10:23:26,219 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:26,219 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:23:26,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:23:26,219 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-09 10:23:26,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1231556396, now seen corresponding path program 1 times [2024-11-09 10:23:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:26,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99398617] [2024-11-09 10:23:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:26,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:26,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99398617] [2024-11-09 10:23:26,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99398617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:26,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:26,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:23:26,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049449035] [2024-11-09 10:23:26,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:26,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:23:26,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:26,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:23:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:23:26,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-11-09 10:23:26,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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) [2024-11-09 10:23:26,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:26,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-11-09 10:23:26,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:27,419 INFO L124 PetriNetUnfolderBase]: 6278/13277 cut-off events. [2024-11-09 10:23:27,419 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-11-09 10:23:27,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22189 conditions, 13277 events. 6278/13277 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 123617 event pairs, 3878 based on Foata normal form. 219/12737 useless extension candidates. Maximal degree in co-relation 22182. Up to 6259 conditions per place. [2024-11-09 10:23:27,486 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 68 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2024-11-09 10:23:27,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 384 flow [2024-11-09 10:23:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:23:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:23:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-11-09 10:23:27,488 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6301369863013698 [2024-11-09 10:23:27,488 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 134 flow. Second operand 5 states and 230 transitions. [2024-11-09 10:23:27,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 384 flow [2024-11-09 10:23:27,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:23:27,491 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 160 flow [2024-11-09 10:23:27,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2024-11-09 10:23:27,492 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-09 10:23:27,493 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 160 flow [2024-11-09 10:23:27,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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) [2024-11-09 10:23:27,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:27,493 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:23:27,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:23:27,495 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-09 10:23:27,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:27,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1464526729, now seen corresponding path program 1 times [2024-11-09 10:23:27,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:27,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934985918] [2024-11-09 10:23:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:27,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:23:27,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:27,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934985918] [2024-11-09 10:23:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934985918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:27,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:27,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:23:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643932700] [2024-11-09 10:23:27,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:27,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:23:27,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:27,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:23:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:23:27,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-11-09 10:23:27,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-11-09 10:23:27,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:27,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-11-09 10:23:27,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:29,050 INFO L124 PetriNetUnfolderBase]: 7752/16493 cut-off events. [2024-11-09 10:23:29,051 INFO L125 PetriNetUnfolderBase]: For 3947/4223 co-relation queries the response was YES. [2024-11-09 10:23:29,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30311 conditions, 16493 events. 7752/16493 cut-off events. For 3947/4223 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 158281 event pairs, 4542 based on Foata normal form. 270/15878 useless extension candidates. Maximal degree in co-relation 30302. Up to 7823 conditions per place. [2024-11-09 10:23:29,163 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 72 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2024-11-09 10:23:29,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 104 transitions, 448 flow [2024-11-09 10:23:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:23:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:23:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-11-09 10:23:29,164 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6246575342465753 [2024-11-09 10:23:29,164 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 160 flow. Second operand 5 states and 228 transitions. [2024-11-09 10:23:29,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 104 transitions, 448 flow [2024-11-09 10:23:29,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 447 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:23:29,170 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 186 flow [2024-11-09 10:23:29,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-11-09 10:23:29,172 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2024-11-09 10:23:29,172 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 186 flow [2024-11-09 10:23:29,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-11-09 10:23:29,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:29,173 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:23:29,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:23:29,173 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-09 10:23:29,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:29,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1685526020, now seen corresponding path program 1 times [2024-11-09 10:23:29,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:29,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681276514] [2024-11-09 10:23:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:29,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:29,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:29,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681276514] [2024-11-09 10:23:29,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681276514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:23:29,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42650614] [2024-11-09 10:23:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:29,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:23:29,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:23:29,468 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) [2024-11-09 10:23:29,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:23:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:29,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:23:29,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:23:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:29,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:23:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:29,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42650614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:23:29,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:23:29,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 10:23:29,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477335114] [2024-11-09 10:23:29,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:23:29,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:23:29,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:23:29,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:23:29,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-11-09 10:23:29,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 186 flow. Second operand has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 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) [2024-11-09 10:23:29,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:29,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-11-09 10:23:29,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:31,920 INFO L124 PetriNetUnfolderBase]: 12261/26579 cut-off events. [2024-11-09 10:23:31,920 INFO L125 PetriNetUnfolderBase]: For 8311/8671 co-relation queries the response was YES. [2024-11-09 10:23:32,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52025 conditions, 26579 events. 12261/26579 cut-off events. For 8311/8671 co-relation queries the response was YES. Maximal size of possible extension queue 1158. Compared 276627 event pairs, 4896 based on Foata normal form. 273/25859 useless extension candidates. Maximal degree in co-relation 52014. Up to 8084 conditions per place. [2024-11-09 10:23:32,126 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 101 selfloop transitions, 7 changer transitions 0/135 dead transitions. [2024-11-09 10:23:32,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 135 transitions, 640 flow [2024-11-09 10:23:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:23:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:23:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 287 transitions. [2024-11-09 10:23:32,128 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6552511415525114 [2024-11-09 10:23:32,128 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 186 flow. Second operand 6 states and 287 transitions. [2024-11-09 10:23:32,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 135 transitions, 640 flow [2024-11-09 10:23:32,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 135 transitions, 639 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:23:32,135 INFO L231 Difference]: Finished difference. Result has 78 places, 65 transitions, 226 flow [2024-11-09 10:23:32,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2024-11-09 10:23:32,136 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2024-11-09 10:23:32,136 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 226 flow [2024-11-09 10:23:32,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 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) [2024-11-09 10:23:32,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:32,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:23:32,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:23:32,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 10:23:32,342 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-09 10:23:32,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:32,342 INFO L85 PathProgramCache]: Analyzing trace with hash -711719525, now seen corresponding path program 1 times [2024-11-09 10:23:32,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:32,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940820311] [2024-11-09 10:23:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:32,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:32,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:32,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940820311] [2024-11-09 10:23:32,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940820311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:32,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:32,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:23:32,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851859761] [2024-11-09 10:23:32,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:32,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:23:32,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:32,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:23:32,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:23:32,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-11-09 10:23:32,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2024-11-09 10:23:32,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:32,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-11-09 10:23:32,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:33,936 INFO L124 PetriNetUnfolderBase]: 11549/21257 cut-off events. [2024-11-09 10:23:33,937 INFO L125 PetriNetUnfolderBase]: For 11280/11655 co-relation queries the response was YES. [2024-11-09 10:23:34,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48991 conditions, 21257 events. 11549/21257 cut-off events. For 11280/11655 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 185111 event pairs, 1666 based on Foata normal form. 819/21358 useless extension candidates. Maximal degree in co-relation 48978. Up to 12961 conditions per place. [2024-11-09 10:23:34,158 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 56 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2024-11-09 10:23:34,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 86 transitions, 414 flow [2024-11-09 10:23:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:23:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:23:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-11-09 10:23:34,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6621004566210046 [2024-11-09 10:23:34,176 INFO L175 Difference]: Start difference. First operand has 78 places, 65 transitions, 226 flow. Second operand 3 states and 145 transitions. [2024-11-09 10:23:34,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 86 transitions, 414 flow [2024-11-09 10:23:34,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 86 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:23:34,222 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 227 flow [2024-11-09 10:23:34,223 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2024-11-09 10:23:34,223 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2024-11-09 10:23:34,223 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 227 flow [2024-11-09 10:23:34,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2024-11-09 10:23:34,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:34,224 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-11-09 10:23:34,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:23:34,224 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-11-09 10:23:34,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash -327760110, now seen corresponding path program 1 times [2024-11-09 10:23:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:34,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056305068] [2024-11-09 10:23:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:34,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 10:23:34,232 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 10:23:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 10:23:34,239 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 10:23:34,239 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 10:23:34,239 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2024-11-09 10:23:34,239 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-11-09 10:23:34,239 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-11-09 10:23:34,240 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (10 of 14 remaining) [2024-11-09 10:23:34,240 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 14 remaining) [2024-11-09 10:23:34,240 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-11-09 10:23:34,240 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-11-09 10:23:34,240 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-11-09 10:23:34,240 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2024-11-09 10:23:34,240 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2024-11-09 10:23:34,240 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2024-11-09 10:23:34,241 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-11-09 10:23:34,241 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-11-09 10:23:34,241 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2024-11-09 10:23:34,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:23:34,241 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:23:34,242 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 10:23:34,242 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-09 10:23:34,309 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 10:23:34,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 95 transitions, 218 flow [2024-11-09 10:23:34,349 INFO L124 PetriNetUnfolderBase]: 16/114 cut-off events. [2024-11-09 10:23:34,349 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-09 10:23:34,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 114 events. 16/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 409 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 99. Up to 5 conditions per place. [2024-11-09 10:23:34,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 95 transitions, 218 flow [2024-11-09 10:23:34,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 95 transitions, 218 flow [2024-11-09 10:23:34,352 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:23:34,352 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;@47cc6d3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:23:34,352 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-11-09 10:23:34,353 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:23:34,353 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-09 10:23:34,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:23:34,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:34,353 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:23:34,353 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-11-09 10:23:34,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:34,354 INFO L85 PathProgramCache]: Analyzing trace with hash 485435, now seen corresponding path program 1 times [2024-11-09 10:23:34,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:34,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472815312] [2024-11-09 10:23:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:34,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:34,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472815312] [2024-11-09 10:23:34,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472815312] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:34,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:34,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:23:34,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038306535] [2024-11-09 10:23:34,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:34,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 10:23:34,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:34,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 10:23:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 10:23:34,372 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 95 [2024-11-09 10:23:34,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 218 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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) [2024-11-09 10:23:34,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:34,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 95 [2024-11-09 10:23:34,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:40,211 INFO L124 PetriNetUnfolderBase]: 51169/84541 cut-off events. [2024-11-09 10:23:40,212 INFO L125 PetriNetUnfolderBase]: For 6918/6918 co-relation queries the response was YES. [2024-11-09 10:23:40,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151504 conditions, 84541 events. 51169/84541 cut-off events. For 6918/6918 co-relation queries the response was YES. Maximal size of possible extension queue 3512. Compared 774306 event pairs, 43302 based on Foata normal form. 21913/101952 useless extension candidates. Maximal degree in co-relation 15419. Up to 64116 conditions per place. [2024-11-09 10:23:41,085 INFO L140 encePairwiseOnDemand]: 86/95 looper letters, 39 selfloop transitions, 0 changer transitions 0/80 dead transitions. [2024-11-09 10:23:41,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 266 flow [2024-11-09 10:23:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 10:23:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-09 10:23:41,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 132 transitions. [2024-11-09 10:23:41,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6947368421052632 [2024-11-09 10:23:41,088 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 218 flow. Second operand 2 states and 132 transitions. [2024-11-09 10:23:41,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 266 flow [2024-11-09 10:23:41,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 260 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-09 10:23:41,095 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 182 flow [2024-11-09 10:23:41,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2024-11-09 10:23:41,095 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -6 predicate places. [2024-11-09 10:23:41,095 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 182 flow [2024-11-09 10:23:41,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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) [2024-11-09 10:23:41,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:41,096 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:23:41,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:23:41,097 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-11-09 10:23:41,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:41,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1579518387, now seen corresponding path program 1 times [2024-11-09 10:23:41,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:41,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655113686] [2024-11-09 10:23:41,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:41,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:41,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:41,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655113686] [2024-11-09 10:23:41,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655113686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:41,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:41,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:23:41,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846682976] [2024-11-09 10:23:41,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:41,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:23:41,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:41,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:23:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:23:41,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 95 [2024-11-09 10:23:41,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2024-11-09 10:23:41,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:41,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 95 [2024-11-09 10:23:41,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:46,788 INFO L124 PetriNetUnfolderBase]: 51169/83445 cut-off events. [2024-11-09 10:23:46,788 INFO L125 PetriNetUnfolderBase]: For 3210/3210 co-relation queries the response was YES. [2024-11-09 10:23:47,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149321 conditions, 83445 events. 51169/83445 cut-off events. For 3210/3210 co-relation queries the response was YES. Maximal size of possible extension queue 3435. Compared 748570 event pairs, 43302 based on Foata normal form. 0/80039 useless extension candidates. Maximal degree in co-relation 149314. Up to 64115 conditions per place. [2024-11-09 10:23:47,394 INFO L140 encePairwiseOnDemand]: 90/95 looper letters, 38 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2024-11-09 10:23:47,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 252 flow [2024-11-09 10:23:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:23:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:23:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-09 10:23:47,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5508771929824562 [2024-11-09 10:23:47,396 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 182 flow. Second operand 3 states and 157 transitions. [2024-11-09 10:23:47,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 252 flow [2024-11-09 10:23:47,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:23:47,404 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 176 flow [2024-11-09 10:23:47,405 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-11-09 10:23:47,406 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -8 predicate places. [2024-11-09 10:23:47,407 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 176 flow [2024-11-09 10:23:47,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2024-11-09 10:23:47,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:47,407 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:23:47,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:23:47,407 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-11-09 10:23:47,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1579518388, now seen corresponding path program 1 times [2024-11-09 10:23:47,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:47,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712423288] [2024-11-09 10:23:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:47,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:47,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:47,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712423288] [2024-11-09 10:23:47,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712423288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:47,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:47,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:23:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285314817] [2024-11-09 10:23:47,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:47,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:23:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:23:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:23:47,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 95 [2024-11-09 10:23:47,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:23:47,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:47,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 95 [2024-11-09 10:23:47,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:56,792 INFO L124 PetriNetUnfolderBase]: 68988/124720 cut-off events. [2024-11-09 10:23:56,799 INFO L125 PetriNetUnfolderBase]: For 3901/3901 co-relation queries the response was YES. [2024-11-09 10:23:57,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215297 conditions, 124720 events. 68988/124720 cut-off events. For 3901/3901 co-relation queries the response was YES. Maximal size of possible extension queue 5083. Compared 1337883 event pairs, 36054 based on Foata normal form. 1755/120612 useless extension candidates. Maximal degree in co-relation 215289. Up to 64115 conditions per place. [2024-11-09 10:23:57,838 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 95 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-09 10:23:57,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 136 transitions, 526 flow [2024-11-09 10:23:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:23:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:23:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2024-11-09 10:23:57,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6463157894736842 [2024-11-09 10:23:57,840 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 176 flow. Second operand 5 states and 307 transitions. [2024-11-09 10:23:57,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 136 transitions, 526 flow [2024-11-09 10:23:57,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:23:57,850 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 202 flow [2024-11-09 10:23:57,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2024-11-09 10:23:57,851 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -3 predicate places. [2024-11-09 10:23:57,851 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 202 flow [2024-11-09 10:23:57,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:23:57,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:57,851 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:23:57,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 10:23:57,851 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-11-09 10:23:57,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:57,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1994378755, now seen corresponding path program 1 times [2024-11-09 10:23:57,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:57,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671888142] [2024-11-09 10:23:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:57,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:23:57,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:57,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671888142] [2024-11-09 10:23:57,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671888142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:57,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:57,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:23:57,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066987333] [2024-11-09 10:23:57,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:57,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:23:57,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:23:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:23:57,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 95 [2024-11-09 10:23:57,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 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) [2024-11-09 10:23:57,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:57,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 95 [2024-11-09 10:23:57,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand