./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --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/weaver/popl20-two-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:56:38,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:56:38,687 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:56:38,693 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:56:38,694 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:56:38,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:56:38,724 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:56:38,725 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:56:38,725 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:56:38,725 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:56:38,725 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:56:38,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:56:38,726 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:56:38,726 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:56:38,726 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:56:38,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:56:38,727 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:56:38,727 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:56:38,727 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:56:38,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:56:38,730 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:56:38,730 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:56:38,730 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:56:38,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:56:38,732 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:56:38,732 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:56:38,732 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:56:38,732 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:56:38,733 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:56:38,733 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:56:38,733 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:56:38,733 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:56:38,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:56:38,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:56:38,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:56:38,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:56:38,734 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:56:38,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:56:38,735 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:56:38,735 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:56:38,735 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:56:38,736 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:56:38,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-11-09 10:56:38,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:56:38,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:56:38,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:56:38,976 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:56:38,976 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:56:38,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-09 10:56:40,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:56:40,451 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:56:40,452 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-09 10:56:40,458 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5c05453/facf95fd56a0417e80b5d7d5739d44b4/FLAG78071bd65 [2024-11-09 10:56:40,470 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5c05453/facf95fd56a0417e80b5d7d5739d44b4 [2024-11-09 10:56:40,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:56:40,474 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:56:40,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:56:40,475 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:56:40,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:56:40,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486ed101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40, skipping insertion in model container [2024-11-09 10:56:40,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,500 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:56:40,658 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:56:40,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:56:40,670 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:56:40,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:56:40,709 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:56:40,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40 WrapperNode [2024-11-09 10:56:40,709 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:56:40,710 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:56:40,710 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:56:40,710 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:56:40,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,743 INFO L138 Inliner]: procedures = 23, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 200 [2024-11-09 10:56:40,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:56:40,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:56:40,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:56:40,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:56:40,755 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,758 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,773 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-09 10:56:40,773 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,773 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,779 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,792 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:56:40,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:56:40,793 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:56:40,793 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:56:40,794 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (1/1) ... [2024-11-09 10:56:40,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:56:40,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:40,822 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 10:56:40,824 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 10:56:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:56:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:56:40,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:56:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:56:40,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:56:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:56:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:56:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:56:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:56:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:56:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:56:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:56:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:56:40,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:56:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:56:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:56:40,863 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 10:56:40,947 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:56:40,949 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:56:41,261 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:56:41,261 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:56:41,515 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:56:41,515 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 10:56:41,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:56:41 BoogieIcfgContainer [2024-11-09 10:56:41,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:56:41,518 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:56:41,519 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:56:41,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:56:41,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:56:40" (1/3) ... [2024-11-09 10:56:41,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61814a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:56:41, skipping insertion in model container [2024-11-09 10:56:41,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:40" (2/3) ... [2024-11-09 10:56:41,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61814a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:56:41, skipping insertion in model container [2024-11-09 10:56:41,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:56:41" (3/3) ... [2024-11-09 10:56:41,525 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-11-09 10:56:41,546 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:56:41,547 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-09 10:56:41,547 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:56:41,641 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:56:41,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 102 flow [2024-11-09 10:56:41,698 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-11-09 10:56:41,698 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:56:41,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 4/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-11-09 10:56:41,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 102 flow [2024-11-09 10:56:41,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 94 flow [2024-11-09 10:56:41,716 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:56:41,723 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;@573aa4ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:56:41,724 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-09 10:56:41,730 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:56:41,731 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:56:41,731 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:56:41,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:41,731 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:56:41,732 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:41,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:41,738 INFO L85 PathProgramCache]: Analyzing trace with hash 636058, now seen corresponding path program 1 times [2024-11-09 10:56:41,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:41,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291252918] [2024-11-09 10:56:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:41,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:41,992 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 10:56:41,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:41,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291252918] [2024-11-09 10:56:41,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291252918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:41,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:41,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:56:41,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246938422] [2024-11-09 10:56:41,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:42,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:56:42,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:42,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:56:42,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:56:42,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-09 10:56:42,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 10:56:42,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:42,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-09 10:56:42,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:42,190 INFO L124 PetriNetUnfolderBase]: 359/589 cut-off events. [2024-11-09 10:56:42,190 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-09 10:56:42,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 589 events. 359/589 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2754 event pairs, 219 based on Foata normal form. 1/361 useless extension candidates. Maximal degree in co-relation 1090. Up to 544 conditions per place. [2024-11-09 10:56:42,203 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-09 10:56:42,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 146 flow [2024-11-09 10:56:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:56:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:56:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-11-09 10:56:42,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-09 10:56:42,219 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 63 transitions. [2024-11-09 10:56:42,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 146 flow [2024-11-09 10:56:42,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:56:42,225 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 82 flow [2024-11-09 10:56:42,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-11-09 10:56:42,230 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2024-11-09 10:56:42,231 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 82 flow [2024-11-09 10:56:42,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 10:56:42,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:42,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:56:42,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:56:42,232 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:42,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash 636059, now seen corresponding path program 1 times [2024-11-09 10:56:42,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:42,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385992821] [2024-11-09 10:56:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:42,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:42,457 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 10:56:42,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:42,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385992821] [2024-11-09 10:56:42,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385992821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:42,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:42,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:42,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575657133] [2024-11-09 10:56:42,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:42,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:42,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:42,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:42,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-09 10:56:42,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 10:56:42,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:42,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-09 10:56:42,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:42,629 INFO L124 PetriNetUnfolderBase]: 360/592 cut-off events. [2024-11-09 10:56:42,629 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:56:42,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 592 events. 360/592 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2772 event pairs, 219 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 1132. Up to 553 conditions per place. [2024-11-09 10:56:42,635 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-09 10:56:42,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 158 flow [2024-11-09 10:56:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-09 10:56:42,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-09 10:56:42,637 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 82 flow. Second operand 4 states and 76 transitions. [2024-11-09 10:56:42,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 158 flow [2024-11-09 10:56:42,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:42,639 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 105 flow [2024-11-09 10:56:42,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2024-11-09 10:56:42,640 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2024-11-09 10:56:42,640 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 105 flow [2024-11-09 10:56:42,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 10:56:42,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:42,640 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:56:42,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:56:42,643 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:42,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash 19719872, now seen corresponding path program 1 times [2024-11-09 10:56:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:42,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248527296] [2024-11-09 10:56:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:42,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:42,838 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 10:56:42,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:42,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248527296] [2024-11-09 10:56:42,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248527296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:42,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:42,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:56:42,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453133117] [2024-11-09 10:56:42,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:42,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:56:42,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:56:42,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:56:42,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-09 10:56:42,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:42,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:42,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-09 10:56:42,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:43,005 INFO L124 PetriNetUnfolderBase]: 361/595 cut-off events. [2024-11-09 10:56:43,005 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:56:43,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1178 conditions, 595 events. 361/595 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2787 event pairs, 219 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1153. Up to 552 conditions per place. [2024-11-09 10:56:43,008 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 31 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-11-09 10:56:43,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 187 flow [2024-11-09 10:56:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:56:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:56:43,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-09 10:56:43,010 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-11-09 10:56:43,010 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 105 flow. Second operand 5 states and 89 transitions. [2024-11-09 10:56:43,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 187 flow [2024-11-09 10:56:43,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:56:43,012 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 139 flow [2024-11-09 10:56:43,012 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-11-09 10:56:43,012 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-11-09 10:56:43,012 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 139 flow [2024-11-09 10:56:43,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:43,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:43,013 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:56:43,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:56:43,013 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:43,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash 611272757, now seen corresponding path program 1 times [2024-11-09 10:56:43,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:43,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638632913] [2024-11-09 10:56:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:43,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:43,190 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 10:56:43,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:43,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638632913] [2024-11-09 10:56:43,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638632913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:43,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282438588] [2024-11-09 10:56:43,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:43,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:43,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:43,193 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 10:56:43,195 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 10:56:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:43,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:56:43,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:43,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:56:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:43,513 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:43,635 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 10:56:43,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282438588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:43,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:43,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:56:43,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218324646] [2024-11-09 10:56:43,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:43,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:56:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:56:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:56:43,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-09 10:56:43,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 139 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 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 10:56:43,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:43,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-09 10:56:43,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:43,958 INFO L124 PetriNetUnfolderBase]: 361/594 cut-off events. [2024-11-09 10:56:43,958 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-09 10:56:43,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 594 events. 361/594 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2796 event pairs, 219 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 1163. Up to 552 conditions per place. [2024-11-09 10:56:43,961 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 30 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-11-09 10:56:43,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 209 flow [2024-11-09 10:56:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:56:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:56:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-11-09 10:56:43,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35984848484848486 [2024-11-09 10:56:43,963 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 139 flow. Second operand 6 states and 95 transitions. [2024-11-09 10:56:43,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 209 flow [2024-11-09 10:56:43,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:56:43,965 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 148 flow [2024-11-09 10:56:43,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-09 10:56:43,965 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2024-11-09 10:56:43,966 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 148 flow [2024-11-09 10:56:43,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 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 10:56:43,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:43,966 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:56:43,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:44,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:44,167 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:44,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1770948141, now seen corresponding path program 1 times [2024-11-09 10:56:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:44,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69903972] [2024-11-09 10:56:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:44,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:44,344 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 10:56:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69903972] [2024-11-09 10:56:44,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69903972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399807500] [2024-11-09 10:56:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:44,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:44,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:44,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:44,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:56:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:44,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:56:44,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:44,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:56:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:44,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:44,707 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 10:56:44,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399807500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:44,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:44,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:56:44,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007171689] [2024-11-09 10:56:44,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:44,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:56:44,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:56:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:56:44,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-09 10:56:44,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 states have internal predecessors, (147), 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 10:56:44,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:44,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-09 10:56:44,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:45,145 INFO L124 PetriNetUnfolderBase]: 361/593 cut-off events. [2024-11-09 10:56:45,146 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-09 10:56:45,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 593 events. 361/593 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2796 event pairs, 219 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 1162. Up to 544 conditions per place. [2024-11-09 10:56:45,148 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 24 selfloop transitions, 12 changer transitions 0/41 dead transitions. [2024-11-09 10:56:45,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 41 transitions, 216 flow [2024-11-09 10:56:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:56:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:56:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-11-09 10:56:45,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3474025974025974 [2024-11-09 10:56:45,150 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 148 flow. Second operand 7 states and 107 transitions. [2024-11-09 10:56:45,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 41 transitions, 216 flow [2024-11-09 10:56:45,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 182 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-09 10:56:45,152 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 134 flow [2024-11-09 10:56:45,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-09 10:56:45,152 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-11-09 10:56:45,152 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 134 flow [2024-11-09 10:56:45,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 states have internal predecessors, (147), 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 10:56:45,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:45,153 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:45,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:45,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:45,359 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:45,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash -932850567, now seen corresponding path program 1 times [2024-11-09 10:56:45,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:45,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062528561] [2024-11-09 10:56:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:45,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:45,432 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 10:56:45,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:45,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062528561] [2024-11-09 10:56:45,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062528561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:45,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:45,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:56:45,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003098581] [2024-11-09 10:56:45,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:45,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:45,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-09 10:56:45,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 10:56:45,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:45,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-09 10:56:45,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:45,559 INFO L124 PetriNetUnfolderBase]: 383/654 cut-off events. [2024-11-09 10:56:45,559 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-09 10:56:45,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 654 events. 383/654 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3189 event pairs, 242 based on Foata normal form. 16/430 useless extension candidates. Maximal degree in co-relation 1140. Up to 552 conditions per place. [2024-11-09 10:56:45,562 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 43 selfloop transitions, 4 changer transitions 1/53 dead transitions. [2024-11-09 10:56:45,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 258 flow [2024-11-09 10:56:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-11-09 10:56:45,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-09 10:56:45,564 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 134 flow. Second operand 4 states and 99 transitions. [2024-11-09 10:56:45,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 258 flow [2024-11-09 10:56:45,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 233 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-09 10:56:45,567 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 130 flow [2024-11-09 10:56:45,567 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-11-09 10:56:45,567 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-11-09 10:56:45,567 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 130 flow [2024-11-09 10:56:45,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 10:56:45,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:45,568 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:45,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:56:45,568 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:45,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1166521821, now seen corresponding path program 1 times [2024-11-09 10:56:45,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:45,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999237833] [2024-11-09 10:56:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:45,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:45,620 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 10:56:45,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:45,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999237833] [2024-11-09 10:56:45,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999237833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:45,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:45,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:45,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721585258] [2024-11-09 10:56:45,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:45,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:45,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:45,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:45,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:45,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-09 10:56:45,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 10:56:45,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:45,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-09 10:56:45,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:45,765 INFO L124 PetriNetUnfolderBase]: 417/764 cut-off events. [2024-11-09 10:56:45,765 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-09 10:56:45,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 764 events. 417/764 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4132 event pairs, 276 based on Foata normal form. 15/525 useless extension candidates. Maximal degree in co-relation 1312. Up to 607 conditions per place. [2024-11-09 10:56:45,768 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2024-11-09 10:56:45,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 301 flow [2024-11-09 10:56:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-11-09 10:56:45,770 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-11-09 10:56:45,771 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 130 flow. Second operand 4 states and 102 transitions. [2024-11-09 10:56:45,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 301 flow [2024-11-09 10:56:45,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:56:45,773 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 146 flow [2024-11-09 10:56:45,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-09 10:56:45,774 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2024-11-09 10:56:45,775 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 146 flow [2024-11-09 10:56:45,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 10:56:45,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:45,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:45,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:56:45,776 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:45,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1059233300, now seen corresponding path program 1 times [2024-11-09 10:56:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:45,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578349692] [2024-11-09 10:56:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:45,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:45,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:45,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578349692] [2024-11-09 10:56:45,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578349692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:45,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452919335] [2024-11-09 10:56:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:45,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:45,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:45,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:45,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:56:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:45,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:56:45,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:46,023 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:56:46,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452919335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:46,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:56:46,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-09 10:56:46,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901443250] [2024-11-09 10:56:46,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:46,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:56:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:46,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:56:46,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:56:46,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-09 10:56:46,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 10:56:46,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:46,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-09 10:56:46,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:46,126 INFO L124 PetriNetUnfolderBase]: 333/633 cut-off events. [2024-11-09 10:56:46,126 INFO L125 PetriNetUnfolderBase]: For 94/109 co-relation queries the response was YES. [2024-11-09 10:56:46,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1526 conditions, 633 events. 333/633 cut-off events. For 94/109 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3310 event pairs, 222 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 1305. Up to 558 conditions per place. [2024-11-09 10:56:46,129 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-11-09 10:56:46,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 206 flow [2024-11-09 10:56:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-11-09 10:56:46,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-09 10:56:46,131 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 146 flow. Second operand 4 states and 78 transitions. [2024-11-09 10:56:46,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 206 flow [2024-11-09 10:56:46,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 39 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:46,133 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 141 flow [2024-11-09 10:56:46,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-11-09 10:56:46,133 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-11-09 10:56:46,134 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 141 flow [2024-11-09 10:56:46,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 10:56:46,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:46,134 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:46,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:56:46,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:46,335 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:46,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1059233301, now seen corresponding path program 1 times [2024-11-09 10:56:46,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:46,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362018844] [2024-11-09 10:56:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:46,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:46,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362018844] [2024-11-09 10:56:46,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362018844] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:46,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:46,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:56:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143625027] [2024-11-09 10:56:46,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:46,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:46,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-09 10:56:46,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 10:56:46,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:46,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-09 10:56:46,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:46,494 INFO L124 PetriNetUnfolderBase]: 259/516 cut-off events. [2024-11-09 10:56:46,494 INFO L125 PetriNetUnfolderBase]: For 88/103 co-relation queries the response was YES. [2024-11-09 10:56:46,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 516 events. 259/516 cut-off events. For 88/103 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2608 event pairs, 174 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 867. Up to 446 conditions per place. [2024-11-09 10:56:46,496 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 29 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-09 10:56:46,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 37 transitions, 197 flow [2024-11-09 10:56:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-09 10:56:46,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-09 10:56:46,497 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 141 flow. Second operand 4 states and 68 transitions. [2024-11-09 10:56:46,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 37 transitions, 197 flow [2024-11-09 10:56:46,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:46,500 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 133 flow [2024-11-09 10:56:46,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2024-11-09 10:56:46,500 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-11-09 10:56:46,501 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 133 flow [2024-11-09 10:56:46,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 10:56:46,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:46,501 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:46,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:56:46,501 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:46,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:46,501 INFO L85 PathProgramCache]: Analyzing trace with hash -793596425, now seen corresponding path program 1 times [2024-11-09 10:56:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:46,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574940329] [2024-11-09 10:56:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:46,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:46,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574940329] [2024-11-09 10:56:46,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574940329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:46,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:46,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:46,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245240078] [2024-11-09 10:56:46,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:46,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:46,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:46,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:46,607 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-09 10:56:46,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 10:56:46,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:46,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-09 10:56:46,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:46,673 INFO L124 PetriNetUnfolderBase]: 195/414 cut-off events. [2024-11-09 10:56:46,673 INFO L125 PetriNetUnfolderBase]: For 80/88 co-relation queries the response was YES. [2024-11-09 10:56:46,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 414 events. 195/414 cut-off events. For 80/88 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2028 event pairs, 132 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 626. Up to 348 conditions per place. [2024-11-09 10:56:46,675 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 25 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-11-09 10:56:46,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 185 flow [2024-11-09 10:56:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:56:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:56:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-09 10:56:46,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-11-09 10:56:46,676 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 133 flow. Second operand 5 states and 76 transitions. [2024-11-09 10:56:46,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 185 flow [2024-11-09 10:56:46,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:46,677 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 131 flow [2024-11-09 10:56:46,677 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2024-11-09 10:56:46,678 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-11-09 10:56:46,678 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 131 flow [2024-11-09 10:56:46,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 10:56:46,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:46,678 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:46,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:56:46,680 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:46,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash -793596424, now seen corresponding path program 1 times [2024-11-09 10:56:46,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:46,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853257785] [2024-11-09 10:56:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:46,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:46,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853257785] [2024-11-09 10:56:46,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853257785] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:46,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:46,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:56:46,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018591594] [2024-11-09 10:56:46,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:46,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:56:46,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:46,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:56:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:56:46,870 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-09 10:56:46,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 10:56:46,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:46,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-09 10:56:46,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:46,926 INFO L124 PetriNetUnfolderBase]: 141/326 cut-off events. [2024-11-09 10:56:46,926 INFO L125 PetriNetUnfolderBase]: For 67/70 co-relation queries the response was YES. [2024-11-09 10:56:46,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 326 events. 141/326 cut-off events. For 67/70 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1535 event pairs, 96 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 425. Up to 274 conditions per place. [2024-11-09 10:56:46,928 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 25 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2024-11-09 10:56:46,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 179 flow [2024-11-09 10:56:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-11-09 10:56:46,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-09 10:56:46,928 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 131 flow. Second operand 4 states and 64 transitions. [2024-11-09 10:56:46,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 179 flow [2024-11-09 10:56:46,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 171 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:56:46,929 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 121 flow [2024-11-09 10:56:46,929 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-11-09 10:56:46,930 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-11-09 10:56:46,930 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 121 flow [2024-11-09 10:56:46,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 10:56:46,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:46,930 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:46,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:56:46,930 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:46,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:46,931 INFO L85 PathProgramCache]: Analyzing trace with hash -130425818, now seen corresponding path program 1 times [2024-11-09 10:56:46,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:46,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199277789] [2024-11-09 10:56:46,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:46,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:46,990 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 10:56:46,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:46,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199277789] [2024-11-09 10:56:46,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199277789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:46,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:46,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:46,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075901813] [2024-11-09 10:56:46,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:46,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:56:46,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:46,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:56:46,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:56:46,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-09 10:56:46,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 10:56:46,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:46,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-09 10:56:46,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:47,061 INFO L124 PetriNetUnfolderBase]: 177/388 cut-off events. [2024-11-09 10:56:47,061 INFO L125 PetriNetUnfolderBase]: For 85/88 co-relation queries the response was YES. [2024-11-09 10:56:47,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 388 events. 177/388 cut-off events. For 85/88 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1851 event pairs, 61 based on Foata normal form. 4/383 useless extension candidates. Maximal degree in co-relation 694. Up to 181 conditions per place. [2024-11-09 10:56:47,063 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 33 selfloop transitions, 3 changer transitions 3/44 dead transitions. [2024-11-09 10:56:47,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 232 flow [2024-11-09 10:56:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:56:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:56:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-09 10:56:47,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-09 10:56:47,064 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 121 flow. Second operand 3 states and 70 transitions. [2024-11-09 10:56:47,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 232 flow [2024-11-09 10:56:47,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:47,066 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 124 flow [2024-11-09 10:56:47,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2024-11-09 10:56:47,066 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-11-09 10:56:47,066 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 124 flow [2024-11-09 10:56:47,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 10:56:47,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:47,067 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:47,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:56:47,067 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:47,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1774377738, now seen corresponding path program 1 times [2024-11-09 10:56:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:47,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410961648] [2024-11-09 10:56:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:47,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:56:47,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:47,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410961648] [2024-11-09 10:56:47,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410961648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:47,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:47,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:47,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467650136] [2024-11-09 10:56:47,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:47,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:56:47,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:47,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:56:47,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:56:47,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-09 10:56:47,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:56:47,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:47,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-09 10:56:47,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:47,161 INFO L124 PetriNetUnfolderBase]: 105/212 cut-off events. [2024-11-09 10:56:47,161 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-11-09 10:56:47,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 212 events. 105/212 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 736 event pairs, 22 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 508. Up to 143 conditions per place. [2024-11-09 10:56:47,163 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 31 selfloop transitions, 2 changer transitions 2/40 dead transitions. [2024-11-09 10:56:47,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 214 flow [2024-11-09 10:56:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:56:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:56:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-09 10:56:47,163 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-09 10:56:47,164 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 124 flow. Second operand 3 states and 66 transitions. [2024-11-09 10:56:47,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 214 flow [2024-11-09 10:56:47,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:56:47,165 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 135 flow [2024-11-09 10:56:47,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-11-09 10:56:47,165 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-11-09 10:56:47,166 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 135 flow [2024-11-09 10:56:47,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:56:47,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:47,166 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:47,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:56:47,166 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:47,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:47,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1404965208, now seen corresponding path program 1 times [2024-11-09 10:56:47,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:47,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295282185] [2024-11-09 10:56:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:47,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:56:47,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:47,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295282185] [2024-11-09 10:56:47,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295282185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:47,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:47,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:47,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472960847] [2024-11-09 10:56:47,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:47,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:56:47,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:47,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:56:47,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:56:47,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-09 10:56:47,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:56:47,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:47,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-09 10:56:47,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:47,256 INFO L124 PetriNetUnfolderBase]: 80/170 cut-off events. [2024-11-09 10:56:47,256 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-09 10:56:47,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 170 events. 80/170 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 486 event pairs, 28 based on Foata normal form. 5/170 useless extension candidates. Maximal degree in co-relation 425. Up to 112 conditions per place. [2024-11-09 10:56:47,257 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 32 selfloop transitions, 2 changer transitions 4/43 dead transitions. [2024-11-09 10:56:47,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 239 flow [2024-11-09 10:56:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:56:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:56:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-11-09 10:56:47,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-11-09 10:56:47,259 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 135 flow. Second operand 3 states and 68 transitions. [2024-11-09 10:56:47,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 239 flow [2024-11-09 10:56:47,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 232 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-09 10:56:47,260 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 145 flow [2024-11-09 10:56:47,260 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2024-11-09 10:56:47,260 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-11-09 10:56:47,260 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 145 flow [2024-11-09 10:56:47,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:56:47,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:47,261 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:47,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:56:47,261 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:56:47,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash 613160197, now seen corresponding path program 1 times [2024-11-09 10:56:47,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:47,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959499982] [2024-11-09 10:56:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:47,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:48,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:48,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959499982] [2024-11-09 10:56:48,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959499982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:48,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456519474] [2024-11-09 10:56:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:48,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:48,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:48,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:56:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:48,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 10:56:48,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:48,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:56:48,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 10:56:48,577 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:56:48,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:56:48,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 10:56:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:49,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:50,743 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-09 10:56:50,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 413 treesize of output 395 [2024-11-09 10:56:50,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:50,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 340 [2024-11-09 10:56:50,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2024-11-09 10:56:51,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:51,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 448 treesize of output 418 [2024-11-09 10:56:53,782 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-09 10:56:53,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 320 treesize of output 338 [2024-11-09 10:56:53,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:53,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 239 [2024-11-09 10:56:53,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-09 10:56:54,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:54,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 270 treesize of output 306 [2024-11-09 10:56:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:55,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456519474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:55,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:55,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-11-09 10:56:55,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948239239] [2024-11-09 10:56:55,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:55,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 10:56:55,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:55,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 10:56:55,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 10:56:55,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-09 10:56:55,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 145 flow. Second operand has 41 states, 41 states have (on average 9.682926829268293) internal successors, (397), 41 states have internal predecessors, (397), 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 10:56:55,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:55,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-09 10:56:55,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:08,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:13,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.65s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:25,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:58:10,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:58:14,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 10:58:18,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]