./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f 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-channel-sum.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 bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:27:08,736 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:27:08,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:27:08,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:27:08,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:27:08,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:27:08,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:27:08,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:27:08,849 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:27:08,850 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:27:08,850 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:27:08,850 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:27:08,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:27:08,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:27:08,856 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:27:08,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:27:08,857 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:27:08,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:27:08,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:27:08,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:27:08,858 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:27:08,858 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:27:08,858 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:27:08,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:27:08,859 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:27:08,859 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:27:08,859 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:27:08,860 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:27:08,860 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:27:08,861 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:27:08,861 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:27:08,862 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:27:08,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:27:08,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:27:08,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:27:08,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:27:08,863 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:27:08,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:27:08,863 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:27:08,864 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:27:08,864 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:27:08,864 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:27:08,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-12 16:27:09,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:27:09,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:27:09,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:27:09,124 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:27:09,125 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:27:09,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-12 16:27:10,583 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:27:10,778 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:27:10,779 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-12 16:27:10,786 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63186d59f/2a48751237eb496fb7ced85fd80a5bf3/FLAG3fa818d77 [2024-11-12 16:27:11,150 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63186d59f/2a48751237eb496fb7ced85fd80a5bf3 [2024-11-12 16:27:11,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:27:11,153 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:27:11,154 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:27:11,155 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:27:11,159 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:27:11,160 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,161 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5ccacd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11, skipping insertion in model container [2024-11-12 16:27:11,161 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,187 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:27:11,429 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:27:11,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:27:11,446 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:27:11,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:27:11,500 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:27:11,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11 WrapperNode [2024-11-12 16:27:11,501 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:27:11,502 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:27:11,503 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:27:11,503 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:27:11,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,523 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,551 INFO L138 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 137 [2024-11-12 16:27:11,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:27:11,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:27:11,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:27:11,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:27:11,573 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,574 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,576 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,589 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-12 16:27:11,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,590 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,596 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,599 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,600 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,602 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:27:11,605 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:27:11,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:27:11,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:27:11,606 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (1/1) ... [2024-11-12 16:27:11,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:27:11,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:11,644 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) [2024-11-12 16:27:11,647 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 [2024-11-12 16:27:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:27:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:27:11,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:27:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:27:11,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:27:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:27:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:27:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:27:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:27:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:27:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:27:11,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:27:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:27:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:27:11,692 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:27:11,781 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:27:11,783 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:27:12,031 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:27:12,031 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:27:12,223 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:27:12,223 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 16:27:12,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:27:12 BoogieIcfgContainer [2024-11-12 16:27:12,224 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:27:12,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:27:12,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:27:12,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:27:12,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:27:11" (1/3) ... [2024-11-12 16:27:12,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33193319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:27:12, skipping insertion in model container [2024-11-12 16:27:12,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:11" (2/3) ... [2024-11-12 16:27:12,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33193319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:27:12, skipping insertion in model container [2024-11-12 16:27:12,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:27:12" (3/3) ... [2024-11-12 16:27:12,237 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-12 16:27:12,253 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:27:12,254 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-12 16:27:12,254 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:27:12,316 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:27:12,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 114 flow [2024-11-12 16:27:12,388 INFO L124 PetriNetUnfolderBase]: 5/48 cut-off events. [2024-11-12 16:27:12,389 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:27:12,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 48 events. 5/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 94 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-11-12 16:27:12,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 50 transitions, 114 flow [2024-11-12 16:27:12,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 47 transitions, 106 flow [2024-11-12 16:27:12,409 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:27:12,418 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;@45ef7ee3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:27:12,419 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-12 16:27:12,429 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:27:12,430 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2024-11-12 16:27:12,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:27:12,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:12,431 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:12,431 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:12,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash -415194869, now seen corresponding path program 1 times [2024-11-12 16:27:12,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:12,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947494992] [2024-11-12 16:27:12,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:12,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:12,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:12,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947494992] [2024-11-12 16:27:12,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947494992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:12,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:12,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:27:12,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009458946] [2024-11-12 16:27:12,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:12,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:27:12,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:12,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:27:12,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:27:12,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-11-12 16:27:12,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2024-11-12 16:27:12,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:12,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-11-12 16:27:12,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:13,093 INFO L124 PetriNetUnfolderBase]: 237/465 cut-off events. [2024-11-12 16:27:13,093 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-12 16:27:13,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 465 events. 237/465 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2148 event pairs, 167 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 773. Up to 356 conditions per place. [2024-11-12 16:27:13,101 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 24 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-12 16:27:13,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 150 flow [2024-11-12 16:27:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:27:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:27:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-12 16:27:13,119 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-11-12 16:27:13,121 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 3 states and 89 transitions. [2024-11-12 16:27:13,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 150 flow [2024-11-12 16:27:13,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 142 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:27:13,129 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2024-11-12 16:27:13,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2024-11-12 16:27:13,138 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2024-11-12 16:27:13,139 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2024-11-12 16:27:13,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2024-11-12 16:27:13,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:13,140 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:13,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:27:13,141 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:13,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash -415194868, now seen corresponding path program 1 times [2024-11-12 16:27:13,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:13,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043400365] [2024-11-12 16:27:13,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:13,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:13,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043400365] [2024-11-12 16:27:13,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043400365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:13,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:13,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:27:13,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536524766] [2024-11-12 16:27:13,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:13,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:27:13,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:27:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:27:13,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-11-12 16:27:13,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-12 16:27:13,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:13,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-11-12 16:27:13,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:13,704 INFO L124 PetriNetUnfolderBase]: 238/468 cut-off events. [2024-11-12 16:27:13,704 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-12 16:27:13,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 468 events. 238/468 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2149 event pairs, 167 based on Foata normal form. 0/373 useless extension candidates. Maximal degree in co-relation 816. Up to 361 conditions per place. [2024-11-12 16:27:13,711 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 26 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-12 16:27:13,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 162 flow [2024-11-12 16:27:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:27:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:27:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-11-12 16:27:13,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-11-12 16:27:13,715 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 4 states and 111 transitions. [2024-11-12 16:27:13,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 162 flow [2024-11-12 16:27:13,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:27:13,718 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 117 flow [2024-11-12 16:27:13,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2024-11-12 16:27:13,722 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2024-11-12 16:27:13,722 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 117 flow [2024-11-12 16:27:13,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-12 16:27:13,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:13,722 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:13,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:27:13,723 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:13,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash 429704157, now seen corresponding path program 1 times [2024-11-12 16:27:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:13,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798699340] [2024-11-12 16:27:13,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:13,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:13,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:13,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798699340] [2024-11-12 16:27:13,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798699340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:13,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901762408] [2024-11-12 16:27:13,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:13,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:13,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:13,999 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) [2024-11-12 16:27:14,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:27:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:14,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:27:14,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:14,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:27:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:14,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:14,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901762408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:14,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:14,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-12 16:27:14,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210908103] [2024-11-12 16:27:14,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:14,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:27:14,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:14,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:27:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:27:14,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-11-12 16:27:14,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 117 flow. Second operand has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 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) [2024-11-12 16:27:14,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:14,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-11-12 16:27:14,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:14,969 INFO L124 PetriNetUnfolderBase]: 239/470 cut-off events. [2024-11-12 16:27:14,969 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-12 16:27:14,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 470 events. 239/470 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2155 event pairs, 167 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 828. Up to 358 conditions per place. [2024-11-12 16:27:14,974 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 22 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2024-11-12 16:27:14,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 189 flow [2024-11-12 16:27:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:27:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:27:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-12 16:27:14,978 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-11-12 16:27:14,979 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 117 flow. Second operand 8 states and 194 transitions. [2024-11-12 16:27:14,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 189 flow [2024-11-12 16:27:14,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:27:14,981 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 142 flow [2024-11-12 16:27:14,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=142, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-11-12 16:27:14,983 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2024-11-12 16:27:14,983 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 142 flow [2024-11-12 16:27:14,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 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) [2024-11-12 16:27:14,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:14,984 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:15,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 16:27:15,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:15,189 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:15,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash 438746138, now seen corresponding path program 1 times [2024-11-12 16:27:15,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:15,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895609952] [2024-11-12 16:27:15,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:15,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:15,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:15,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895609952] [2024-11-12 16:27:15,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895609952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:15,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:15,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:27:15,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968653225] [2024-11-12 16:27:15,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:15,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:27:15,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:15,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:27:15,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:27:15,234 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-12 16:27:15,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2024-11-12 16:27:15,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:15,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-12 16:27:15,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:15,316 INFO L124 PetriNetUnfolderBase]: 225/509 cut-off events. [2024-11-12 16:27:15,316 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-12 16:27:15,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 509 events. 225/509 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2424 event pairs, 88 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 888. Up to 254 conditions per place. [2024-11-12 16:27:15,320 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 41 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-11-12 16:27:15,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 264 flow [2024-11-12 16:27:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:27:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:27:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-12 16:27:15,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-12 16:27:15,322 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 142 flow. Second operand 3 states and 99 transitions. [2024-11-12 16:27:15,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 264 flow [2024-11-12 16:27:15,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 222 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-12 16:27:15,324 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 138 flow [2024-11-12 16:27:15,324 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2024-11-12 16:27:15,325 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-11-12 16:27:15,325 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 138 flow [2024-11-12 16:27:15,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2024-11-12 16:27:15,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:15,326 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:15,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:27:15,326 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:15,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:15,327 INFO L85 PathProgramCache]: Analyzing trace with hash -619351905, now seen corresponding path program 1 times [2024-11-12 16:27:15,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:15,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771955975] [2024-11-12 16:27:15,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:15,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:15,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:15,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771955975] [2024-11-12 16:27:15,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771955975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:15,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:15,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:27:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548571416] [2024-11-12 16:27:15,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:15,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:27:15,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:27:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:27:15,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-11-12 16:27:15,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:27:15,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:15,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-11-12 16:27:15,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:15,555 INFO L124 PetriNetUnfolderBase]: 247/549 cut-off events. [2024-11-12 16:27:15,555 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-11-12 16:27:15,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 549 events. 247/549 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2607 event pairs, 167 based on Foata normal form. 0/478 useless extension candidates. Maximal degree in co-relation 360. Up to 383 conditions per place. [2024-11-12 16:27:15,560 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 43 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-12 16:27:15,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 262 flow [2024-11-12 16:27:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:27:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:27:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-11-12 16:27:15,563 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-11-12 16:27:15,563 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 138 flow. Second operand 4 states and 126 transitions. [2024-11-12 16:27:15,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 262 flow [2024-11-12 16:27:15,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:27:15,567 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 139 flow [2024-11-12 16:27:15,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-12 16:27:15,568 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2024-11-12 16:27:15,568 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 139 flow [2024-11-12 16:27:15,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:27:15,570 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:15,571 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:15,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:27:15,571 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:15,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1074049198, now seen corresponding path program 1 times [2024-11-12 16:27:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:15,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702550441] [2024-11-12 16:27:15,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:15,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:15,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:15,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702550441] [2024-11-12 16:27:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702550441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:15,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:15,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:27:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676453504] [2024-11-12 16:27:15,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:15,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:27:15,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:15,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:27:15,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:27:15,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-11-12 16:27:15,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2024-11-12 16:27:15,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:15,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-11-12 16:27:15,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:15,977 INFO L124 PetriNetUnfolderBase]: 247/555 cut-off events. [2024-11-12 16:27:15,977 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-11-12 16:27:15,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 555 events. 247/555 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2625 event pairs, 107 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 1011. Up to 300 conditions per place. [2024-11-12 16:27:15,981 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 35 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-11-12 16:27:15,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 246 flow [2024-11-12 16:27:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:27:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:27:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-12 16:27:15,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.504 [2024-11-12 16:27:15,983 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 139 flow. Second operand 5 states and 126 transitions. [2024-11-12 16:27:15,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 246 flow [2024-11-12 16:27:15,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 238 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:27:15,985 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 145 flow [2024-11-12 16:27:15,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-12 16:27:15,986 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2024-11-12 16:27:15,986 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 145 flow [2024-11-12 16:27:15,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2024-11-12 16:27:15,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:15,987 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:15,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:27:15,987 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:15,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:15,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1074049197, now seen corresponding path program 1 times [2024-11-12 16:27:15,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:15,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778721768] [2024-11-12 16:27:15,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:15,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:16,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:16,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778721768] [2024-11-12 16:27:16,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778721768] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:16,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:16,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:27:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836968781] [2024-11-12 16:27:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:16,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:27:16,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:27:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:27:16,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-11-12 16:27:16,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2024-11-12 16:27:16,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:16,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-11-12 16:27:16,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:16,175 INFO L124 PetriNetUnfolderBase]: 247/499 cut-off events. [2024-11-12 16:27:16,175 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-12 16:27:16,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 499 events. 247/499 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2081 event pairs, 167 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 320. Up to 432 conditions per place. [2024-11-12 16:27:16,179 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-12 16:27:16,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 209 flow [2024-11-12 16:27:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:27:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:27:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-12 16:27:16,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-11-12 16:27:16,180 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 145 flow. Second operand 4 states and 97 transitions. [2024-11-12 16:27:16,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 209 flow [2024-11-12 16:27:16,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:27:16,182 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 129 flow [2024-11-12 16:27:16,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-12 16:27:16,186 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2024-11-12 16:27:16,186 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 129 flow [2024-11-12 16:27:16,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2024-11-12 16:27:16,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:16,186 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:16,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:27:16,187 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:16,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash 792479215, now seen corresponding path program 1 times [2024-11-12 16:27:16,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:16,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259119136] [2024-11-12 16:27:16,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:16,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:27:16,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:16,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259119136] [2024-11-12 16:27:16,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259119136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:16,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:16,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:27:16,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053981643] [2024-11-12 16:27:16,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:16,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:27:16,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:27:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:27:16,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-11-12 16:27:16,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:27:16,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:16,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-11-12 16:27:16,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:16,346 INFO L124 PetriNetUnfolderBase]: 354/730 cut-off events. [2024-11-12 16:27:16,347 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-11-12 16:27:16,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1574 conditions, 730 events. 354/730 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3242 event pairs, 155 based on Foata normal form. 3/682 useless extension candidates. Maximal degree in co-relation 1414. Up to 365 conditions per place. [2024-11-12 16:27:16,351 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 48 selfloop transitions, 2 changer transitions 3/64 dead transitions. [2024-11-12 16:27:16,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 287 flow [2024-11-12 16:27:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:27:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:27:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-12 16:27:16,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-11-12 16:27:16,355 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 129 flow. Second operand 3 states and 106 transitions. [2024-11-12 16:27:16,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 287 flow [2024-11-12 16:27:16,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:27:16,360 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 128 flow [2024-11-12 16:27:16,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-12 16:27:16,361 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2024-11-12 16:27:16,361 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 128 flow [2024-11-12 16:27:16,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:27:16,361 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:16,361 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:16,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:27:16,361 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:16,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1486721596, now seen corresponding path program 1 times [2024-11-12 16:27:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:16,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357867399] [2024-11-12 16:27:16,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:27:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:16,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357867399] [2024-11-12 16:27:16,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357867399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:16,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:16,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:27:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11015198] [2024-11-12 16:27:16,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:16,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:27:16,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:27:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:27:16,591 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-11-12 16:27:16,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 128 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 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) [2024-11-12 16:27:16,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:16,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-11-12 16:27:16,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:16,834 INFO L124 PetriNetUnfolderBase]: 333/661 cut-off events. [2024-11-12 16:27:16,835 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-12 16:27:16,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 661 events. 333/661 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2889 event pairs, 51 based on Foata normal form. 0/592 useless extension candidates. Maximal degree in co-relation 1447. Up to 238 conditions per place. [2024-11-12 16:27:16,839 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 64 selfloop transitions, 12 changer transitions 3/87 dead transitions. [2024-11-12 16:27:16,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 87 transitions, 400 flow [2024-11-12 16:27:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:27:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:27:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-11-12 16:27:16,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-11-12 16:27:16,841 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 128 flow. Second operand 7 states and 196 transitions. [2024-11-12 16:27:16,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 87 transitions, 400 flow [2024-11-12 16:27:16,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 386 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-12 16:27:16,843 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 170 flow [2024-11-12 16:27:16,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-11-12 16:27:16,844 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-11-12 16:27:16,844 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 170 flow [2024-11-12 16:27:16,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 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) [2024-11-12 16:27:16,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:16,845 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:16,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:27:16,845 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:16,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash -811085535, now seen corresponding path program 1 times [2024-11-12 16:27:16,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:16,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810951666] [2024-11-12 16:27:16,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:16,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:27:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810951666] [2024-11-12 16:27:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810951666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589331308] [2024-11-12 16:27:17,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:17,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:17,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:17,089 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) [2024-11-12 16:27:17,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:27:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:17,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:27:17,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:27:17,215 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:27:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589331308] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:17,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:27:17,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-11-12 16:27:17,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882939872] [2024-11-12 16:27:17,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:17,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:27:17,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:27:17,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-12 16:27:17,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-12 16:27:17,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2024-11-12 16:27:17,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:17,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-12 16:27:17,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:17,412 INFO L124 PetriNetUnfolderBase]: 655/1309 cut-off events. [2024-11-12 16:27:17,412 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2024-11-12 16:27:17,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 1309 events. 655/1309 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6540 event pairs, 191 based on Foata normal form. 16/1221 useless extension candidates. Maximal degree in co-relation 3071. Up to 449 conditions per place. [2024-11-12 16:27:17,421 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 62 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-11-12 16:27:17,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 440 flow [2024-11-12 16:27:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:27:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:27:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-12 16:27:17,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-11-12 16:27:17,422 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 170 flow. Second operand 4 states and 136 transitions. [2024-11-12 16:27:17,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 440 flow [2024-11-12 16:27:17,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:27:17,426 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 258 flow [2024-11-12 16:27:17,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-11-12 16:27:17,426 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2024-11-12 16:27:17,427 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 258 flow [2024-11-12 16:27:17,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2024-11-12 16:27:17,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:17,427 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:17,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:27:17,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-12 16:27:17,628 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:17,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:17,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1777425387, now seen corresponding path program 1 times [2024-11-12 16:27:17,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:17,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256160649] [2024-11-12 16:27:17,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:17,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:27:17,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:17,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256160649] [2024-11-12 16:27:17,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256160649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:17,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099584087] [2024-11-12 16:27:17,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:17,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:17,874 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) [2024-11-12 16:27:17,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:27:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:17,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-12 16:27:17,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:18,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:18,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099584087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:18,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:18,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-12 16:27:18,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196543791] [2024-11-12 16:27:18,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:18,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 16:27:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 16:27:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-12 16:27:18,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-11-12 16:27:18,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 258 flow. Second operand has 17 states, 17 states have (on average 19.41176470588235) internal successors, (330), 17 states have internal predecessors, (330), 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) [2024-11-12 16:27:18,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:18,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-11-12 16:27:18,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:18,859 INFO L124 PetriNetUnfolderBase]: 786/1520 cut-off events. [2024-11-12 16:27:18,860 INFO L125 PetriNetUnfolderBase]: For 1328/1328 co-relation queries the response was YES. [2024-11-12 16:27:18,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4197 conditions, 1520 events. 786/1520 cut-off events. For 1328/1328 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7600 event pairs, 536 based on Foata normal form. 0/1416 useless extension candidates. Maximal degree in co-relation 3621. Up to 1186 conditions per place. [2024-11-12 16:27:18,870 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 64 selfloop transitions, 15 changer transitions 2/89 dead transitions. [2024-11-12 16:27:18,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 532 flow [2024-11-12 16:27:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 16:27:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 16:27:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-11-12 16:27:18,872 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44181818181818183 [2024-11-12 16:27:18,872 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 258 flow. Second operand 11 states and 243 transitions. [2024-11-12 16:27:18,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 532 flow [2024-11-12 16:27:18,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 532 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:27:18,876 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 367 flow [2024-11-12 16:27:18,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=367, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-11-12 16:27:18,877 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2024-11-12 16:27:18,877 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 367 flow [2024-11-12 16:27:18,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.41176470588235) internal successors, (330), 17 states have internal predecessors, (330), 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) [2024-11-12 16:27:18,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:18,878 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:18,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-12 16:27:19,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:19,079 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:19,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1357682648, now seen corresponding path program 2 times [2024-11-12 16:27:19,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:19,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713264563] [2024-11-12 16:27:19,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:19,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:27:19,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:19,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713264563] [2024-11-12 16:27:19,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713264563] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:19,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:19,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:27:19,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907933161] [2024-11-12 16:27:19,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:19,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:27:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:19,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:27:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:27:19,400 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-12 16:27:19,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 367 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:27:19,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:19,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-12 16:27:19,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:19,664 INFO L124 PetriNetUnfolderBase]: 734/1420 cut-off events. [2024-11-12 16:27:19,664 INFO L125 PetriNetUnfolderBase]: For 1898/1898 co-relation queries the response was YES. [2024-11-12 16:27:19,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 1420 events. 734/1420 cut-off events. For 1898/1898 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6900 event pairs, 361 based on Foata normal form. 32/1422 useless extension candidates. Maximal degree in co-relation 3627. Up to 927 conditions per place. [2024-11-12 16:27:19,674 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 54 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-11-12 16:27:19,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 543 flow [2024-11-12 16:27:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:27:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:27:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-12 16:27:19,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.528 [2024-11-12 16:27:19,676 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 367 flow. Second operand 5 states and 132 transitions. [2024-11-12 16:27:19,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 543 flow [2024-11-12 16:27:19,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 525 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:27:19,681 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 367 flow [2024-11-12 16:27:19,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=367, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-11-12 16:27:19,684 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 20 predicate places. [2024-11-12 16:27:19,684 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 367 flow [2024-11-12 16:27:19,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:27:19,684 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:19,684 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:19,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:27:19,684 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:19,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:19,685 INFO L85 PathProgramCache]: Analyzing trace with hash -702976683, now seen corresponding path program 1 times [2024-11-12 16:27:19,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:19,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830178153] [2024-11-12 16:27:19,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:19,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:20,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:20,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830178153] [2024-11-12 16:27:20,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830178153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:20,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114773686] [2024-11-12 16:27:20,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:20,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:20,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:20,145 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) [2024-11-12 16:27:20,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:27:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:20,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 16:27:20,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:20,308 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 [2024-11-12 16:27:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:20,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:21,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 61 treesize of output 55 [2024-11-12 16:27:21,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:27:21,110 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 78 treesize of output 68 [2024-11-12 16:27:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:27:21,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114773686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:21,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:21,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-11-12 16:27:21,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986077921] [2024-11-12 16:27:21,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:21,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 16:27:21,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 16:27:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2024-11-12 16:27:21,664 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-12 16:27:21,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 367 flow. Second operand has 29 states, 29 states have (on average 21.517241379310345) internal successors, (624), 29 states have internal predecessors, (624), 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) [2024-11-12 16:27:21,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:21,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-12 16:27:21,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:23,276 INFO L124 PetriNetUnfolderBase]: 1607/3049 cut-off events. [2024-11-12 16:27:23,276 INFO L125 PetriNetUnfolderBase]: For 4727/4727 co-relation queries the response was YES. [2024-11-12 16:27:23,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9269 conditions, 3049 events. 1607/3049 cut-off events. For 4727/4727 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 18041 event pairs, 149 based on Foata normal form. 7/2982 useless extension candidates. Maximal degree in co-relation 8282. Up to 642 conditions per place. [2024-11-12 16:27:23,295 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 155 selfloop transitions, 82 changer transitions 73/318 dead transitions. [2024-11-12 16:27:23,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 318 transitions, 2196 flow [2024-11-12 16:27:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-12 16:27:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-12 16:27:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 899 transitions. [2024-11-12 16:27:23,298 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5288235294117647 [2024-11-12 16:27:23,298 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 367 flow. Second operand 34 states and 899 transitions. [2024-11-12 16:27:23,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 318 transitions, 2196 flow [2024-11-12 16:27:23,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 318 transitions, 2132 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:27:23,309 INFO L231 Difference]: Finished difference. Result has 113 places, 134 transitions, 1103 flow [2024-11-12 16:27:23,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1103, PETRI_PLACES=113, PETRI_TRANSITIONS=134} [2024-11-12 16:27:23,311 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 64 predicate places. [2024-11-12 16:27:23,311 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 134 transitions, 1103 flow [2024-11-12 16:27:23,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 21.517241379310345) internal successors, (624), 29 states have internal predecessors, (624), 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) [2024-11-12 16:27:23,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:23,312 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:23,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:27:23,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:23,512 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:23,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1707527397, now seen corresponding path program 1 times [2024-11-12 16:27:23,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:23,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774463002] [2024-11-12 16:27:23,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:23,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:27:23,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:23,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774463002] [2024-11-12 16:27:23,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774463002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:23,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:23,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:27:23,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548767131] [2024-11-12 16:27:23,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:23,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:27:23,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:27:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:27:23,591 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-12 16:27:23,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 134 transitions, 1103 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-12 16:27:23,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:23,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-12 16:27:23,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:23,872 INFO L124 PetriNetUnfolderBase]: 1385/2508 cut-off events. [2024-11-12 16:27:23,873 INFO L125 PetriNetUnfolderBase]: For 8016/8016 co-relation queries the response was YES. [2024-11-12 16:27:23,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9712 conditions, 2508 events. 1385/2508 cut-off events. For 8016/8016 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 12325 event pairs, 798 based on Foata normal form. 4/2512 useless extension candidates. Maximal degree in co-relation 9664. Up to 2314 conditions per place. [2024-11-12 16:27:23,893 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 103 selfloop transitions, 2 changer transitions 7/120 dead transitions. [2024-11-12 16:27:23,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1161 flow [2024-11-12 16:27:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:27:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:27:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-12 16:27:23,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-12 16:27:23,895 INFO L175 Difference]: Start difference. First operand has 113 places, 134 transitions, 1103 flow. Second operand 3 states and 100 transitions. [2024-11-12 16:27:23,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1161 flow [2024-11-12 16:27:23,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 1049 flow, removed 47 selfloop flow, removed 14 redundant places. [2024-11-12 16:27:23,922 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 756 flow [2024-11-12 16:27:23,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=756, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2024-11-12 16:27:23,923 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2024-11-12 16:27:23,923 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 756 flow [2024-11-12 16:27:23,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-12 16:27:23,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:23,923 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:23,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-12 16:27:23,924 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:23,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash 689771739, now seen corresponding path program 2 times [2024-11-12 16:27:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:23,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719526709] [2024-11-12 16:27:23,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:23,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:27:24,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:24,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719526709] [2024-11-12 16:27:24,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719526709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:27:24,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:27:24,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:27:24,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650397636] [2024-11-12 16:27:24,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:27:24,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:27:24,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:24,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:27:24,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:27:24,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-11-12 16:27:24,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 756 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:27:24,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:24,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-11-12 16:27:24,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:24,492 INFO L124 PetriNetUnfolderBase]: 1778/3217 cut-off events. [2024-11-12 16:27:24,493 INFO L125 PetriNetUnfolderBase]: For 6245/6245 co-relation queries the response was YES. [2024-11-12 16:27:24,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10873 conditions, 3217 events. 1778/3217 cut-off events. For 6245/6245 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 16125 event pairs, 425 based on Foata normal form. 158/3375 useless extension candidates. Maximal degree in co-relation 10811. Up to 1638 conditions per place. [2024-11-12 16:27:24,521 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 117 selfloop transitions, 4 changer transitions 2/130 dead transitions. [2024-11-12 16:27:24,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 130 transitions, 1157 flow [2024-11-12 16:27:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:27:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:27:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-12 16:27:24,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-12 16:27:24,522 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 756 flow. Second operand 4 states and 118 transitions. [2024-11-12 16:27:24,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 130 transitions, 1157 flow [2024-11-12 16:27:24,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 1145 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-12 16:27:24,537 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 713 flow [2024-11-12 16:27:24,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=713, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-11-12 16:27:24,539 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2024-11-12 16:27:24,539 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 713 flow [2024-11-12 16:27:24,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:27:24,539 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:24,539 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:24,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:27:24,539 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:24,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1385051409, now seen corresponding path program 1 times [2024-11-12 16:27:24,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:24,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720093345] [2024-11-12 16:27:24,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:24,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:27:25,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:25,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720093345] [2024-11-12 16:27:25,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720093345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:25,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496994773] [2024-11-12 16:27:25,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:25,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:25,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:25,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:27:25,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:27:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:25,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-12 16:27:25,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:26,016 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 [2024-11-12 16:27:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:27:26,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:27,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 117 treesize of output 105 [2024-11-12 16:27:27,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:27:27,788 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 237 treesize of output 208 [2024-11-12 16:27:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:27:28,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496994773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:28,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:28,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 46 [2024-11-12 16:27:28,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409270278] [2024-11-12 16:27:28,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:28,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-12 16:27:28,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:28,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-12 16:27:28,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1854, Unknown=0, NotChecked=0, Total=2162 [2024-11-12 16:27:29,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-12 16:27:29,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 713 flow. Second operand has 47 states, 47 states have (on average 21.21276595744681) internal successors, (997), 47 states have internal predecessors, (997), 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) [2024-11-12 16:27:29,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:29,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-12 16:27:29,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:27:55,585 INFO L124 PetriNetUnfolderBase]: 13975/26990 cut-off events. [2024-11-12 16:27:55,586 INFO L125 PetriNetUnfolderBase]: For 54223/54223 co-relation queries the response was YES. [2024-11-12 16:27:55,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89586 conditions, 26990 events. 13975/26990 cut-off events. For 54223/54223 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 224927 event pairs, 759 based on Foata normal form. 284/27202 useless extension candidates. Maximal degree in co-relation 79916. Up to 4648 conditions per place. [2024-11-12 16:27:55,780 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 1096 selfloop transitions, 1439 changer transitions 400/2945 dead transitions. [2024-11-12 16:27:55,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 2945 transitions, 22825 flow [2024-11-12 16:27:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 350 states. [2024-11-12 16:27:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2024-11-12 16:27:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 8901 transitions. [2024-11-12 16:27:55,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5086285714285714 [2024-11-12 16:27:55,805 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 713 flow. Second operand 350 states and 8901 transitions. [2024-11-12 16:27:55,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 2945 transitions, 22825 flow [2024-11-12 16:27:55,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 2945 transitions, 22797 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-11-12 16:27:55,951 INFO L231 Difference]: Finished difference. Result has 545 places, 1633 transitions, 16705 flow [2024-11-12 16:27:55,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=350, PETRI_FLOW=16705, PETRI_PLACES=545, PETRI_TRANSITIONS=1633} [2024-11-12 16:27:55,953 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 496 predicate places. [2024-11-12 16:27:55,953 INFO L471 AbstractCegarLoop]: Abstraction has has 545 places, 1633 transitions, 16705 flow [2024-11-12 16:27:55,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 21.21276595744681) internal successors, (997), 47 states have internal predecessors, (997), 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) [2024-11-12 16:27:55,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:27:55,954 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:27:55,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:27:56,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-12 16:27:56,159 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:27:56,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:27:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -867750195, now seen corresponding path program 2 times [2024-11-12 16:27:56,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:27:56,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840468259] [2024-11-12 16:27:56,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:27:56,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:27:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:27:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:27:57,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:27:57,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840468259] [2024-11-12 16:27:57,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840468259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:27:57,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557065938] [2024-11-12 16:27:57,471 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:27:57,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:27:57,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:27:57,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:27:57,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:27:57,556 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:27:57,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:27:57,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-12 16:27:57,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:27:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:27:57,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:27:58,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:27:58,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 75 treesize of output 60 [2024-11-12 16:27:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:27:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557065938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:27:58,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:27:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 35 [2024-11-12 16:27:58,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559613753] [2024-11-12 16:27:58,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:27:58,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-12 16:27:58,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:27:58,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-12 16:27:58,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2024-11-12 16:27:59,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-12 16:27:59,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 1633 transitions, 16705 flow. Second operand has 36 states, 36 states have (on average 21.86111111111111) internal successors, (787), 36 states have internal predecessors, (787), 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) [2024-11-12 16:27:59,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:27:59,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-12 16:27:59,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:28:17,306 INFO L124 PetriNetUnfolderBase]: 22123/41571 cut-off events. [2024-11-12 16:28:17,306 INFO L125 PetriNetUnfolderBase]: For 5450714/5450718 co-relation queries the response was YES. [2024-11-12 16:28:18,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300976 conditions, 41571 events. 22123/41571 cut-off events. For 5450714/5450718 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 365058 event pairs, 2698 based on Foata normal form. 34/41245 useless extension candidates. Maximal degree in co-relation 297349. Up to 14901 conditions per place. [2024-11-12 16:28:18,340 INFO L140 encePairwiseOnDemand]: 34/50 looper letters, 2145 selfloop transitions, 1443 changer transitions 80/3678 dead transitions. [2024-11-12 16:28:18,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 3678 transitions, 46812 flow [2024-11-12 16:28:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-12 16:28:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-11-12 16:28:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 1839 transitions. [2024-11-12 16:28:18,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5038356164383562 [2024-11-12 16:28:18,350 INFO L175 Difference]: Start difference. First operand has 545 places, 1633 transitions, 16705 flow. Second operand 73 states and 1839 transitions. [2024-11-12 16:28:18,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 3678 transitions, 46812 flow [2024-11-12 16:28:28,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 3678 transitions, 41383 flow, removed 2638 selfloop flow, removed 18 redundant places. [2024-11-12 16:28:28,121 INFO L231 Difference]: Finished difference. Result has 612 places, 2622 transitions, 29278 flow [2024-11-12 16:28:28,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=14481, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=496, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=29278, PETRI_PLACES=612, PETRI_TRANSITIONS=2622} [2024-11-12 16:28:28,123 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 563 predicate places. [2024-11-12 16:28:28,123 INFO L471 AbstractCegarLoop]: Abstraction has has 612 places, 2622 transitions, 29278 flow [2024-11-12 16:28:28,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 21.86111111111111) internal successors, (787), 36 states have internal predecessors, (787), 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) [2024-11-12 16:28:28,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:28:28,124 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:28:28,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 16:28:28,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 16:28:28,325 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:28:28,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:28:28,326 INFO L85 PathProgramCache]: Analyzing trace with hash 598120929, now seen corresponding path program 3 times [2024-11-12 16:28:28,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:28:28,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111622324] [2024-11-12 16:28:28,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:28:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:28:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:28:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:28:29,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:28:29,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111622324] [2024-11-12 16:28:29,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111622324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:28:29,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264257658] [2024-11-12 16:28:29,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:28:29,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:28:29,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:28:29,234 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:28:29,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:28:29,314 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:28:29,314 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:28:29,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 16:28:29,318 INFO L279 TraceCheckSpWp]: Computing forward predicates...