./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-send-receive.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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:22:18,562 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:22:18,624 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:22:18,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:22:18,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:22:18,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:22:18,654 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:22:18,655 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:22:18,655 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:22:18,657 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:22:18,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:22:18,658 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:22:18,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:22:18,659 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:22:18,659 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:22:18,660 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:22:18,660 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:22:18,660 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:22:18,660 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:22:18,660 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:22:18,661 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:22:18,661 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:22:18,661 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:22:18,661 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:22:18,662 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:22:18,662 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:22:18,662 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:22:18,662 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:22:18,662 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:22:18,663 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:22:18,663 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:22:18,663 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:22:18,663 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:22:18,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:22:18,664 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:22:18,664 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:22:18,664 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:22:18,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:22:18,664 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:22:18,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:22:18,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:22:18,667 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:22:18,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-11-10 18:22:18,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:22:18,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:22:18,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:22:18,914 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:22:18,914 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:22:18,915 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-10 18:22:20,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:22:20,401 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:22:20,401 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-10 18:22:20,411 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b96ef2d10/3f6365088a6644f091b4f88958667679/FLAG96a2cf91e [2024-11-10 18:22:20,427 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b96ef2d10/3f6365088a6644f091b4f88958667679 [2024-11-10 18:22:20,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:22:20,431 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:22:20,445 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:22:20,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:22:20,450 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:22:20,451 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb6002f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20, skipping insertion in model container [2024-11-10 18:22:20,452 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,475 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:22:20,649 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:22:20,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:22:20,663 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:22:20,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:22:20,715 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:22:20,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20 WrapperNode [2024-11-10 18:22:20,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:22:20,716 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:22:20,717 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:22:20,717 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:22:20,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,730 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,748 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 147 [2024-11-10 18:22:20,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:22:20,749 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:22:20,749 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:22:20,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:22:20,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,766 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,787 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]. [2024-11-10 18:22:20,788 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,788 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,795 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,796 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,797 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,799 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:22:20,803 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:22:20,803 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:22:20,803 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:22:20,804 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (1/1) ... [2024-11-10 18:22:20,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:22:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:20,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:22:20,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:22:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:22:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:22:20,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:22:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:22:20,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:22:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:22:20,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:22:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:22:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:22:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:22:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:22:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:22:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:22:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:22:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:22:20,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:22:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:22:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:22:20,881 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:22:20,967 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:22:20,969 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:22:21,215 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:22:21,215 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:22:21,367 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:22:21,367 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:22:21,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:22:21 BoogieIcfgContainer [2024-11-10 18:22:21,368 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:22:21,370 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:22:21,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:22:21,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:22:21,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:22:20" (1/3) ... [2024-11-10 18:22:21,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac05c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:22:21, skipping insertion in model container [2024-11-10 18:22:21,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:20" (2/3) ... [2024-11-10 18:22:21,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac05c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:22:21, skipping insertion in model container [2024-11-10 18:22:21,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:22:21" (3/3) ... [2024-11-10 18:22:21,378 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-11-10 18:22:21,392 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:22:21,393 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-10 18:22:21,393 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:22:21,445 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:22:21,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 57 transitions, 135 flow [2024-11-10 18:22:21,508 INFO L124 PetriNetUnfolderBase]: 7/54 cut-off events. [2024-11-10 18:22:21,512 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:22:21,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 54 events. 7/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 120 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-11-10 18:22:21,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 57 transitions, 135 flow [2024-11-10 18:22:21,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 53 transitions, 124 flow [2024-11-10 18:22:21,532 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:22:21,539 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;@492c515b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:22:21,540 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-10 18:22:21,544 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:22:21,545 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:22:21,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:22:21,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:21,546 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:22:21,547 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:21,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:21,551 INFO L85 PathProgramCache]: Analyzing trace with hash 12906997, now seen corresponding path program 1 times [2024-11-10 18:22:21,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:21,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836331276] [2024-11-10 18:22:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:21,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:21,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:21,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836331276] [2024-11-10 18:22:21,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836331276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:21,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:21,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:22:21,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891973047] [2024-11-10 18:22:21,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:21,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:22:21,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:21,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:22:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:22:21,920 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:22:21,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:21,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:21,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:22:21,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:22,169 INFO L124 PetriNetUnfolderBase]: 1137/1807 cut-off events. [2024-11-10 18:22:22,170 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-11-10 18:22:22,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3646 conditions, 1807 events. 1137/1807 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 10975 event pairs, 952 based on Foata normal form. 135/1446 useless extension candidates. Maximal degree in co-relation 3412. Up to 1664 conditions per place. [2024-11-10 18:22:22,188 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 30 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-10 18:22:22,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 176 flow [2024-11-10 18:22:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:22:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:22:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-11-10 18:22:22,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5497076023391813 [2024-11-10 18:22:22,199 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 124 flow. Second operand 3 states and 94 transitions. [2024-11-10 18:22:22,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 176 flow [2024-11-10 18:22:22,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:22:22,210 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 104 flow [2024-11-10 18:22:22,212 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-11-10 18:22:22,216 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2024-11-10 18:22:22,217 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 104 flow [2024-11-10 18:22:22,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:22,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:22,217 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:22:22,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:22:22,218 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:22,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash 12906998, now seen corresponding path program 1 times [2024-11-10 18:22:22,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:22,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32569548] [2024-11-10 18:22:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:22,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:22,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:22,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32569548] [2024-11-10 18:22:22,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32569548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:22,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:22,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:22:22,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426735040] [2024-11-10 18:22:22,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:22,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:22,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:22,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:22,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:22:22,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:22,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:22,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:22:22,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:22,772 INFO L124 PetriNetUnfolderBase]: 1138/1812 cut-off events. [2024-11-10 18:22:22,772 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-10 18:22:22,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3555 conditions, 1812 events. 1138/1812 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 11105 event pairs, 952 based on Foata normal form. 0/1315 useless extension candidates. Maximal degree in co-relation 3529. Up to 1669 conditions per place. [2024-11-10 18:22:22,785 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 32 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-10 18:22:22,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 184 flow [2024-11-10 18:22:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-11-10 18:22:22,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4956140350877193 [2024-11-10 18:22:22,788 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 104 flow. Second operand 4 states and 113 transitions. [2024-11-10 18:22:22,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 184 flow [2024-11-10 18:22:22,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:22,792 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 127 flow [2024-11-10 18:22:22,792 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-10 18:22:22,792 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2024-11-10 18:22:22,793 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 127 flow [2024-11-10 18:22:22,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:22,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:22,793 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:22:22,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:22:22,793 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:22,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2034284444, now seen corresponding path program 1 times [2024-11-10 18:22:22,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:22,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152497428] [2024-11-10 18:22:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:22,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:23,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152497428] [2024-11-10 18:22:23,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152497428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:23,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935961688] [2024-11-10 18:22:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:23,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:23,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:23,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:23,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:22:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:23,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 18:22:23,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:23,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:22:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:23,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:23,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935961688] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:23,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:22:23,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848735442] [2024-11-10 18:22:23,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:23,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:22:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:22:23,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:22:23,546 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-11-10 18:22:23,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 127 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:23,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:23,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-11-10 18:22:23,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:23,866 INFO L124 PetriNetUnfolderBase]: 1138/1811 cut-off events. [2024-11-10 18:22:23,867 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-10 18:22:23,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1811 events. 1138/1811 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 11045 event pairs, 952 based on Foata normal form. 0/1315 useless extension candidates. Maximal degree in co-relation 3539. Up to 1665 conditions per place. [2024-11-10 18:22:23,876 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 30 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-10 18:22:23,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 199 flow [2024-11-10 18:22:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:22:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:22:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-11-10 18:22:23,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4269005847953216 [2024-11-10 18:22:23,881 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 127 flow. Second operand 6 states and 146 transitions. [2024-11-10 18:22:23,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 199 flow [2024-11-10 18:22:23,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:23,883 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 134 flow [2024-11-10 18:22:23,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-10 18:22:23,883 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-11-10 18:22:23,883 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 134 flow [2024-11-10 18:22:23,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:23,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:23,884 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:23,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:22:24,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:24,085 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:24,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:24,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2108357994, now seen corresponding path program 1 times [2024-11-10 18:22:24,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:24,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347601856] [2024-11-10 18:22:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:24,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:24,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347601856] [2024-11-10 18:22:24,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347601856] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:24,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:24,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:22:24,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061778369] [2024-11-10 18:22:24,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:24,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:22:24,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:22:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:22:24,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-11-10 18:22:24,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:24,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:24,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-11-10 18:22:24,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:24,312 INFO L124 PetriNetUnfolderBase]: 1377/2248 cut-off events. [2024-11-10 18:22:24,312 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-10 18:22:24,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4394 conditions, 2248 events. 1377/2248 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12708 event pairs, 580 based on Foata normal form. 72/1796 useless extension candidates. Maximal degree in co-relation 4366. Up to 1376 conditions per place. [2024-11-10 18:22:24,322 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 50 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2024-11-10 18:22:24,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 280 flow [2024-11-10 18:22:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:22:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:22:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-11-10 18:22:24,324 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6608187134502924 [2024-11-10 18:22:24,324 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 134 flow. Second operand 3 states and 113 transitions. [2024-11-10 18:22:24,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 280 flow [2024-11-10 18:22:24,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 257 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-10 18:22:24,326 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 134 flow [2024-11-10 18:22:24,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-11-10 18:22:24,327 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2024-11-10 18:22:24,327 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 134 flow [2024-11-10 18:22:24,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:24,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:24,327 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:24,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:22:24,328 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:24,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1456763945, now seen corresponding path program 1 times [2024-11-10 18:22:24,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:24,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374492655] [2024-11-10 18:22:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:24,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:24,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:24,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374492655] [2024-11-10 18:22:24,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374492655] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:24,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:24,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:22:24,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147099289] [2024-11-10 18:22:24,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:24,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:24,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:24,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:24,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:22:24,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:24,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:24,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:22:24,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:24,520 INFO L124 PetriNetUnfolderBase]: 957/1549 cut-off events. [2024-11-10 18:22:24,521 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-11-10 18:22:24,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3325 conditions, 1549 events. 957/1549 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8133 event pairs, 794 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 1133. Up to 1418 conditions per place. [2024-11-10 18:22:24,530 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 31 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2024-11-10 18:22:24,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 194 flow [2024-11-10 18:22:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-11-10 18:22:24,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-11-10 18:22:24,533 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 134 flow. Second operand 4 states and 108 transitions. [2024-11-10 18:22:24,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 194 flow [2024-11-10 18:22:24,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:24,538 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 129 flow [2024-11-10 18:22:24,538 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-11-10 18:22:24,539 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -5 predicate places. [2024-11-10 18:22:24,539 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 129 flow [2024-11-10 18:22:24,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:24,539 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:24,539 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:24,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:22:24,539 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:24,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1456763946, now seen corresponding path program 1 times [2024-11-10 18:22:24,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:24,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879078183] [2024-11-10 18:22:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:24,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:24,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:24,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879078183] [2024-11-10 18:22:24,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879078183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:24,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:24,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:22:24,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137608266] [2024-11-10 18:22:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:24,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:24,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:22:24,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:24,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:24,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:22:24,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:24,792 INFO L124 PetriNetUnfolderBase]: 1128/1875 cut-off events. [2024-11-10 18:22:24,793 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-11-10 18:22:24,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3908 conditions, 1875 events. 1128/1875 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10398 event pairs, 966 based on Foata normal form. 21/1702 useless extension candidates. Maximal degree in co-relation 3245. Up to 1422 conditions per place. [2024-11-10 18:22:24,802 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 48 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-11-10 18:22:24,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 273 flow [2024-11-10 18:22:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:22:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:22:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-11-10 18:22:24,804 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512280701754386 [2024-11-10 18:22:24,804 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 129 flow. Second operand 5 states and 146 transitions. [2024-11-10 18:22:24,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 273 flow [2024-11-10 18:22:24,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 269 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:24,805 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 143 flow [2024-11-10 18:22:24,806 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-10 18:22:24,806 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-11-10 18:22:24,806 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 143 flow [2024-11-10 18:22:24,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:24,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:24,807 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:24,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:22:24,807 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:24,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1918273156, now seen corresponding path program 1 times [2024-11-10 18:22:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:24,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992547773] [2024-11-10 18:22:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:24,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:24,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:24,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992547773] [2024-11-10 18:22:24,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992547773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:24,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680828949] [2024-11-10 18:22:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:24,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:24,976 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:24,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:22:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:25,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:22:25,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:25,180 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:22:25,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680828949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:25,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:22:25,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-10 18:22:25,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805905134] [2024-11-10 18:22:25,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:25,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:22:25,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:22:25,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:22:25,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:22:25,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 143 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:25,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:25,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:22:25,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:25,386 INFO L124 PetriNetUnfolderBase]: 776/1427 cut-off events. [2024-11-10 18:22:25,386 INFO L125 PetriNetUnfolderBase]: For 236/236 co-relation queries the response was YES. [2024-11-10 18:22:25,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2906 conditions, 1427 events. 776/1427 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8087 event pairs, 533 based on Foata normal form. 124/1412 useless extension candidates. Maximal degree in co-relation 2247. Up to 1001 conditions per place. [2024-11-10 18:22:25,394 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 35 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-11-10 18:22:25,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 245 flow [2024-11-10 18:22:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:22:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:22:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-10 18:22:25,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47719298245614034 [2024-11-10 18:22:25,396 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 143 flow. Second operand 5 states and 136 transitions. [2024-11-10 18:22:25,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 245 flow [2024-11-10 18:22:25,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:25,397 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 149 flow [2024-11-10 18:22:25,398 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-11-10 18:22:25,398 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-11-10 18:22:25,398 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 149 flow [2024-11-10 18:22:25,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:25,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:25,399 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:25,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:22:25,599 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,SelfDestructingSolverStorable6 [2024-11-10 18:22:25,603 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:25,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1988498495, now seen corresponding path program 1 times [2024-11-10 18:22:25,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:25,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161628042] [2024-11-10 18:22:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:25,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:25,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:25,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161628042] [2024-11-10 18:22:25,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161628042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:25,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:25,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:22:25,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990134767] [2024-11-10 18:22:25,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:25,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:25,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:25,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:22:25,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:25,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:25,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:22:25,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:25,819 INFO L124 PetriNetUnfolderBase]: 837/1511 cut-off events. [2024-11-10 18:22:25,819 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2024-11-10 18:22:25,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3346 conditions, 1511 events. 837/1511 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8304 event pairs, 135 based on Foata normal form. 108/1591 useless extension candidates. Maximal degree in co-relation 2643. Up to 778 conditions per place. [2024-11-10 18:22:25,827 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 68 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-11-10 18:22:25,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 87 transitions, 443 flow [2024-11-10 18:22:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:22:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:22:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-11-10 18:22:25,828 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5578947368421052 [2024-11-10 18:22:25,828 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 149 flow. Second operand 5 states and 159 transitions. [2024-11-10 18:22:25,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 87 transitions, 443 flow [2024-11-10 18:22:25,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 397 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:22:25,831 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 164 flow [2024-11-10 18:22:25,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-11-10 18:22:25,831 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-11-10 18:22:25,832 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 164 flow [2024-11-10 18:22:25,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:25,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:25,832 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:25,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:22:25,832 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:25,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1322823725, now seen corresponding path program 2 times [2024-11-10 18:22:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236806550] [2024-11-10 18:22:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:25,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236806550] [2024-11-10 18:22:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236806550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:25,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:25,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:22:25,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062270843] [2024-11-10 18:22:25,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:25,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:25,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:25,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:25,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:22:25,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:25,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:25,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:22:25,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:26,118 INFO L124 PetriNetUnfolderBase]: 1039/1878 cut-off events. [2024-11-10 18:22:26,119 INFO L125 PetriNetUnfolderBase]: For 771/771 co-relation queries the response was YES. [2024-11-10 18:22:26,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4371 conditions, 1878 events. 1039/1878 cut-off events. For 771/771 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10700 event pairs, 341 based on Foata normal form. 90/1870 useless extension candidates. Maximal degree in co-relation 3580. Up to 961 conditions per place. [2024-11-10 18:22:26,131 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 59 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-11-10 18:22:26,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 404 flow [2024-11-10 18:22:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:22:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:22:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-11-10 18:22:26,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2024-11-10 18:22:26,132 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 164 flow. Second operand 5 states and 150 transitions. [2024-11-10 18:22:26,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 404 flow [2024-11-10 18:22:26,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:26,135 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 207 flow [2024-11-10 18:22:26,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-11-10 18:22:26,136 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-11-10 18:22:26,138 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 207 flow [2024-11-10 18:22:26,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:26,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:26,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:26,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:22:26,139 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:26,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash -541090849, now seen corresponding path program 3 times [2024-11-10 18:22:26,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:26,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118089690] [2024-11-10 18:22:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:26,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:26,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118089690] [2024-11-10 18:22:26,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118089690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:26,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:26,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:22:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947237275] [2024-11-10 18:22:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:26,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:22:26,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:26,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:22:26,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:22:26,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:22:26,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:26,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:26,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:22:26,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:26,501 INFO L124 PetriNetUnfolderBase]: 1215/2326 cut-off events. [2024-11-10 18:22:26,501 INFO L125 PetriNetUnfolderBase]: For 1643/1647 co-relation queries the response was YES. [2024-11-10 18:22:26,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5632 conditions, 2326 events. 1215/2326 cut-off events. For 1643/1647 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 13707 event pairs, 270 based on Foata normal form. 104/2389 useless extension candidates. Maximal degree in co-relation 5004. Up to 608 conditions per place. [2024-11-10 18:22:26,515 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 57 selfloop transitions, 4 changer transitions 19/93 dead transitions. [2024-11-10 18:22:26,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 507 flow [2024-11-10 18:22:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:22:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:22:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-11-10 18:22:26,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5543859649122806 [2024-11-10 18:22:26,516 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 207 flow. Second operand 5 states and 158 transitions. [2024-11-10 18:22:26,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 507 flow [2024-11-10 18:22:26,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:26,521 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 183 flow [2024-11-10 18:22:26,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2024-11-10 18:22:26,522 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-11-10 18:22:26,523 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 183 flow [2024-11-10 18:22:26,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:26,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:26,523 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:26,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:22:26,523 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:26,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash -706779585, now seen corresponding path program 1 times [2024-11-10 18:22:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:26,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742235208] [2024-11-10 18:22:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:26,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:22:26,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:26,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742235208] [2024-11-10 18:22:26,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742235208] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:26,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:26,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:22:26,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449860076] [2024-11-10 18:22:26,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:26,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:22:26,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:26,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:22:26,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:22:26,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-11-10 18:22:26,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:26,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:26,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-11-10 18:22:26,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:26,727 INFO L124 PetriNetUnfolderBase]: 813/1407 cut-off events. [2024-11-10 18:22:26,728 INFO L125 PetriNetUnfolderBase]: For 1621/1647 co-relation queries the response was YES. [2024-11-10 18:22:26,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 1407 events. 813/1407 cut-off events. For 1621/1647 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7002 event pairs, 356 based on Foata normal form. 8/1412 useless extension candidates. Maximal degree in co-relation 3741. Up to 1081 conditions per place. [2024-11-10 18:22:26,734 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 46 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-11-10 18:22:26,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 339 flow [2024-11-10 18:22:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:22:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:22:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-10 18:22:26,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2024-11-10 18:22:26,735 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 183 flow. Second operand 3 states and 96 transitions. [2024-11-10 18:22:26,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 339 flow [2024-11-10 18:22:26,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 304 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-11-10 18:22:26,739 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 167 flow [2024-11-10 18:22:26,739 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=167, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-11-10 18:22:26,739 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-11-10 18:22:26,740 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 167 flow [2024-11-10 18:22:26,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:26,740 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:26,740 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:26,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:22:26,740 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:26,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1220753997, now seen corresponding path program 1 times [2024-11-10 18:22:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:26,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291675179] [2024-11-10 18:22:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:26,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:27,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:27,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291675179] [2024-11-10 18:22:27,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291675179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:27,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206457730] [2024-11-10 18:22:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:27,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:27,276 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) [2024-11-10 18:22:27,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:22:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:27,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 18:22:27,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:27,399 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 [2024-11-10 18:22:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:27,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:28,127 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 [2024-11-10 18:22:28,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:28,143 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 [2024-11-10 18:22:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206457730] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:28,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:28,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 30 [2024-11-10 18:22:28,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070246810] [2024-11-10 18:22:28,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:28,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-10 18:22:28,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:28,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-10 18:22:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-11-10 18:22:28,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-10 18:22:28,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 167 flow. Second operand has 31 states, 31 states have (on average 16.451612903225808) internal successors, (510), 31 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:28,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:28,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-10 18:22:28,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:31,142 INFO L124 PetriNetUnfolderBase]: 7521/11828 cut-off events. [2024-11-10 18:22:31,142 INFO L125 PetriNetUnfolderBase]: For 8553/8553 co-relation queries the response was YES. [2024-11-10 18:22:31,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31030 conditions, 11828 events. 7521/11828 cut-off events. For 8553/8553 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 75733 event pairs, 600 based on Foata normal form. 356/12183 useless extension candidates. Maximal degree in co-relation 18773. Up to 2321 conditions per place. [2024-11-10 18:22:31,196 INFO L140 encePairwiseOnDemand]: 41/57 looper letters, 331 selfloop transitions, 103 changer transitions 43/485 dead transitions. [2024-11-10 18:22:31,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 485 transitions, 2592 flow [2024-11-10 18:22:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-10 18:22:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-11-10 18:22:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 1159 transitions. [2024-11-10 18:22:31,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-11-10 18:22:31,207 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 167 flow. Second operand 50 states and 1159 transitions. [2024-11-10 18:22:31,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 485 transitions, 2592 flow [2024-11-10 18:22:31,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 485 transitions, 2571 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:31,217 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1169 flow [2024-11-10 18:22:31,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1169, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-11-10 18:22:31,218 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-11-10 18:22:31,219 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1169 flow [2024-11-10 18:22:31,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 16.451612903225808) internal successors, (510), 31 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:31,219 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:31,219 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2024-11-10 18:22:31,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:31,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:31,422 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:31,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1937766475, now seen corresponding path program 2 times [2024-11-10 18:22:31,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:31,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283687284] [2024-11-10 18:22:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:31,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:31,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:31,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283687284] [2024-11-10 18:22:31,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283687284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:31,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875907876] [2024-11-10 18:22:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:22:31,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:31,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:31,535 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) [2024-11-10 18:22:31,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:22:31,601 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:22:31,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:31,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 18:22:31,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:22:31,645 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:22:31,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875907876] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:31,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:22:31,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-10 18:22:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522554481] [2024-11-10 18:22:31,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:31,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:31,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-10 18:22:31,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-11-10 18:22:31,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1169 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:31,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:31,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-11-10 18:22:31,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:32,282 INFO L124 PetriNetUnfolderBase]: 2705/5195 cut-off events. [2024-11-10 18:22:32,282 INFO L125 PetriNetUnfolderBase]: For 41367/41403 co-relation queries the response was YES. [2024-11-10 18:22:32,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22584 conditions, 5195 events. 2705/5195 cut-off events. For 41367/41403 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 34329 event pairs, 723 based on Foata normal form. 180/5231 useless extension candidates. Maximal degree in co-relation 18617. Up to 1708 conditions per place. [2024-11-10 18:22:32,326 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 131 selfloop transitions, 48 changer transitions 0/210 dead transitions. [2024-11-10 18:22:32,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 210 transitions, 1829 flow [2024-11-10 18:22:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2024-11-10 18:22:32,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6140350877192983 [2024-11-10 18:22:32,331 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1169 flow. Second operand 4 states and 140 transitions. [2024-11-10 18:22:32,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 210 transitions, 1829 flow [2024-11-10 18:22:32,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 210 transitions, 1567 flow, removed 82 selfloop flow, removed 15 redundant places. [2024-11-10 18:22:32,527 INFO L231 Difference]: Finished difference. Result has 122 places, 168 transitions, 1237 flow [2024-11-10 18:22:32,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1237, PETRI_PLACES=122, PETRI_TRANSITIONS=168} [2024-11-10 18:22:32,529 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-11-10 18:22:32,529 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 168 transitions, 1237 flow [2024-11-10 18:22:32,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:32,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:32,530 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:32,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:32,730 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 [2024-11-10 18:22:32,731 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:32,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash 657274775, now seen corresponding path program 3 times [2024-11-10 18:22:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:32,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308150540] [2024-11-10 18:22:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:33,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:33,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308150540] [2024-11-10 18:22:33,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308150540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:33,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036965154] [2024-11-10 18:22:33,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:22:33,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:33,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:33,731 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) [2024-11-10 18:22:33,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:22:33,798 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:22:33,798 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:33,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:22:33,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-10 18:22:33,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:34,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:34,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-10 18:22:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-10 18:22:34,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036965154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:34,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:34,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 21 [2024-11-10 18:22:34,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171955775] [2024-11-10 18:22:34,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:34,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 18:22:34,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 18:22:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-10 18:22:34,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-10 18:22:34,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 168 transitions, 1237 flow. Second operand has 22 states, 22 states have (on average 19.863636363636363) internal successors, (437), 22 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:34,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:34,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-10 18:22:34,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:35,931 INFO L124 PetriNetUnfolderBase]: 6293/10929 cut-off events. [2024-11-10 18:22:35,931 INFO L125 PetriNetUnfolderBase]: For 62425/62545 co-relation queries the response was YES. [2024-11-10 18:22:35,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45625 conditions, 10929 events. 6293/10929 cut-off events. For 62425/62545 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 74797 event pairs, 622 based on Foata normal form. 388/11166 useless extension candidates. Maximal degree in co-relation 23035. Up to 2594 conditions per place. [2024-11-10 18:22:36,097 INFO L140 encePairwiseOnDemand]: 44/57 looper letters, 223 selfloop transitions, 80 changer transitions 58/384 dead transitions. [2024-11-10 18:22:36,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 384 transitions, 3610 flow [2024-11-10 18:22:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-10 18:22:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-10 18:22:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 610 transitions. [2024-11-10 18:22:36,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.396361273554256 [2024-11-10 18:22:36,102 INFO L175 Difference]: Start difference. First operand has 122 places, 168 transitions, 1237 flow. Second operand 27 states and 610 transitions. [2024-11-10 18:22:36,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 384 transitions, 3610 flow [2024-11-10 18:22:36,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 384 transitions, 3500 flow, removed 55 selfloop flow, removed 0 redundant places. [2024-11-10 18:22:36,183 INFO L231 Difference]: Finished difference. Result has 150 places, 198 transitions, 1693 flow [2024-11-10 18:22:36,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1693, PETRI_PLACES=150, PETRI_TRANSITIONS=198} [2024-11-10 18:22:36,184 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-11-10 18:22:36,184 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 198 transitions, 1693 flow [2024-11-10 18:22:36,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.863636363636363) internal successors, (437), 22 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:36,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:36,185 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:36,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:36,385 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,SelfDestructingSolverStorable13 [2024-11-10 18:22:36,385 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:36,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:36,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1523237645, now seen corresponding path program 4 times [2024-11-10 18:22:36,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:36,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507153527] [2024-11-10 18:22:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:36,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:22:36,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:36,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507153527] [2024-11-10 18:22:36,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507153527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:36,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791189897] [2024-11-10 18:22:36,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 18:22:36,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:36,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:36,500 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) [2024-11-10 18:22:36,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:22:36,571 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 18:22:36,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:36,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:22:36,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:22:36,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:22:36,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791189897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:36,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:36,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-10 18:22:36,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140946023] [2024-11-10 18:22:36,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:36,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:22:36,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:36,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:22:36,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:22:36,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:22:36,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 198 transitions, 1693 flow. Second operand has 13 states, 13 states have (on average 22.53846153846154) internal successors, (293), 13 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:36,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:36,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:22:36,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:37,622 INFO L124 PetriNetUnfolderBase]: 2710/5212 cut-off events. [2024-11-10 18:22:37,622 INFO L125 PetriNetUnfolderBase]: For 30717/30755 co-relation queries the response was YES. [2024-11-10 18:22:37,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22444 conditions, 5212 events. 2710/5212 cut-off events. For 30717/30755 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 33991 event pairs, 841 based on Foata normal form. 34/5090 useless extension candidates. Maximal degree in co-relation 16813. Up to 3544 conditions per place. [2024-11-10 18:22:37,672 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 119 selfloop transitions, 15 changer transitions 34/191 dead transitions. [2024-11-10 18:22:37,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 191 transitions, 1844 flow [2024-11-10 18:22:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 18:22:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 18:22:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-11-10 18:22:37,674 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44019138755980863 [2024-11-10 18:22:37,674 INFO L175 Difference]: Start difference. First operand has 150 places, 198 transitions, 1693 flow. Second operand 11 states and 276 transitions. [2024-11-10 18:22:37,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 191 transitions, 1844 flow [2024-11-10 18:22:37,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 191 transitions, 1707 flow, removed 20 selfloop flow, removed 15 redundant places. [2024-11-10 18:22:37,714 INFO L231 Difference]: Finished difference. Result has 138 places, 153 transitions, 1211 flow [2024-11-10 18:22:37,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1211, PETRI_PLACES=138, PETRI_TRANSITIONS=153} [2024-11-10 18:22:37,715 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-11-10 18:22:37,715 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 153 transitions, 1211 flow [2024-11-10 18:22:37,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.53846153846154) internal successors, (293), 13 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:37,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:37,716 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:37,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:37,916 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,SelfDestructingSolverStorable14 [2024-11-10 18:22:37,917 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:37,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash -37680339, now seen corresponding path program 5 times [2024-11-10 18:22:37,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:37,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931318044] [2024-11-10 18:22:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:38,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931318044] [2024-11-10 18:22:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931318044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:38,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:22:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13366498] [2024-11-10 18:22:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:38,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:38,073 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-10 18:22:38,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 153 transitions, 1211 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:38,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:38,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-10 18:22:38,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:39,067 INFO L124 PetriNetUnfolderBase]: 5074/9068 cut-off events. [2024-11-10 18:22:39,068 INFO L125 PetriNetUnfolderBase]: For 42000/42092 co-relation queries the response was YES. [2024-11-10 18:22:39,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35699 conditions, 9068 events. 5074/9068 cut-off events. For 42000/42092 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 60079 event pairs, 1230 based on Foata normal form. 492/9363 useless extension candidates. Maximal degree in co-relation 29282. Up to 4009 conditions per place. [2024-11-10 18:22:39,132 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 173 selfloop transitions, 4 changer transitions 0/193 dead transitions. [2024-11-10 18:22:39,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 193 transitions, 1863 flow [2024-11-10 18:22:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-11-10 18:22:39,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5219298245614035 [2024-11-10 18:22:39,133 INFO L175 Difference]: Start difference. First operand has 138 places, 153 transitions, 1211 flow. Second operand 4 states and 119 transitions. [2024-11-10 18:22:39,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 193 transitions, 1863 flow [2024-11-10 18:22:39,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 193 transitions, 1832 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-10 18:22:39,170 INFO L231 Difference]: Finished difference. Result has 119 places, 152 transitions, 1201 flow [2024-11-10 18:22:39,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1201, PETRI_PLACES=119, PETRI_TRANSITIONS=152} [2024-11-10 18:22:39,171 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-11-10 18:22:39,171 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 152 transitions, 1201 flow [2024-11-10 18:22:39,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:39,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:39,171 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1] [2024-11-10 18:22:39,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 18:22:39,172 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:39,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:39,172 INFO L85 PathProgramCache]: Analyzing trace with hash -369342065, now seen corresponding path program 1 times [2024-11-10 18:22:39,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:39,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582766151] [2024-11-10 18:22:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:39,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:40,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582766151] [2024-11-10 18:22:40,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582766151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590033844] [2024-11-10 18:22:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:40,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:40,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:40,202 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) [2024-11-10 18:22:40,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:22:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:40,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-10 18:22:40,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:40,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:41,067 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-10 18:22:41,068 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 50 [2024-11-10 18:22:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:41,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590033844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:41,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:41,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 38 [2024-11-10 18:22:41,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088682128] [2024-11-10 18:22:41,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:41,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-10 18:22:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-10 18:22:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2024-11-10 18:22:41,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-10 18:22:41,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 152 transitions, 1201 flow. Second operand has 39 states, 39 states have (on average 16.846153846153847) internal successors, (657), 39 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:41,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:41,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-10 18:22:41,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:47,879 INFO L124 PetriNetUnfolderBase]: 15022/25744 cut-off events. [2024-11-10 18:22:47,879 INFO L125 PetriNetUnfolderBase]: For 102782/102946 co-relation queries the response was YES. [2024-11-10 18:22:48,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99140 conditions, 25744 events. 15022/25744 cut-off events. For 102782/102946 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 188149 event pairs, 1180 based on Foata normal form. 700/26241 useless extension candidates. Maximal degree in co-relation 50110. Up to 3238 conditions per place. [2024-11-10 18:22:48,135 INFO L140 encePairwiseOnDemand]: 41/57 looper letters, 595 selfloop transitions, 344 changer transitions 94/1043 dead transitions. [2024-11-10 18:22:48,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 1043 transitions, 9133 flow [2024-11-10 18:22:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-10 18:22:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-11-10 18:22:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 1915 transitions. [2024-11-10 18:22:48,139 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39065687474500205 [2024-11-10 18:22:48,139 INFO L175 Difference]: Start difference. First operand has 119 places, 152 transitions, 1201 flow. Second operand 86 states and 1915 transitions. [2024-11-10 18:22:48,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 1043 transitions, 9133 flow [2024-11-10 18:22:48,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1043 transitions, 8959 flow, removed 85 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:48,222 INFO L231 Difference]: Finished difference. Result has 239 places, 437 transitions, 4822 flow [2024-11-10 18:22:48,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=4822, PETRI_PLACES=239, PETRI_TRANSITIONS=437} [2024-11-10 18:22:48,223 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 183 predicate places. [2024-11-10 18:22:48,223 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 437 transitions, 4822 flow [2024-11-10 18:22:48,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 16.846153846153847) internal successors, (657), 39 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:48,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:48,225 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1] [2024-11-10 18:22:48,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:48,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:48,426 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:22:48,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1101927011, now seen corresponding path program 2 times [2024-11-10 18:22:48,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:48,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081495658] [2024-11-10 18:22:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:49,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:49,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081495658] [2024-11-10 18:22:49,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081495658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:49,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853731860] [2024-11-10 18:22:49,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:22:49,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:49,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:49,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:22:49,386 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:22:49,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:49,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-10 18:22:49,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:49,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:50,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:50,330 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 [2024-11-10 18:22:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:50,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853731860] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:50,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:50,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 40 [2024-11-10 18:22:50,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772928817] [2024-11-10 18:22:50,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:50,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-10 18:22:50,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:50,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-10 18:22:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2024-11-10 18:22:50,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-10 18:22:50,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 437 transitions, 4822 flow. Second operand has 41 states, 41 states have (on average 18.365853658536587) internal successors, (753), 41 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:22:50,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:50,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-10 18:22:50,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:02,152 INFO L124 PetriNetUnfolderBase]: 26008/44632 cut-off events. [2024-11-10 18:23:02,152 INFO L125 PetriNetUnfolderBase]: For 648411/648641 co-relation queries the response was YES. [2024-11-10 18:23:02,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224690 conditions, 44632 events. 26008/44632 cut-off events. For 648411/648641 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 367916 event pairs, 1973 based on Foata normal form. 1110/45586 useless extension candidates. Maximal degree in co-relation 223119. Up to 5795 conditions per place. [2024-11-10 18:23:02,697 INFO L140 encePairwiseOnDemand]: 42/57 looper letters, 731 selfloop transitions, 308 changer transitions 445/1551 dead transitions. [2024-11-10 18:23:02,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1551 transitions, 18689 flow [2024-11-10 18:23:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-10 18:23:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2024-11-10 18:23:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 1932 transitions. [2024-11-10 18:23:02,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4290473017988008 [2024-11-10 18:23:02,700 INFO L175 Difference]: Start difference. First operand has 239 places, 437 transitions, 4822 flow. Second operand 79 states and 1932 transitions. [2024-11-10 18:23:02,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1551 transitions, 18689 flow [2024-11-10 18:23:05,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1551 transitions, 16503 flow, removed 1022 selfloop flow, removed 9 redundant places. [2024-11-10 18:23:05,014 INFO L231 Difference]: Finished difference. Result has 343 places, 631 transitions, 7585 flow [2024-11-10 18:23:05,014 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=4003, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=7585, PETRI_PLACES=343, PETRI_TRANSITIONS=631} [2024-11-10 18:23:05,015 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 287 predicate places. [2024-11-10 18:23:05,015 INFO L471 AbstractCegarLoop]: Abstraction has has 343 places, 631 transitions, 7585 flow [2024-11-10 18:23:05,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 18.365853658536587) internal successors, (753), 41 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:23:05,015 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:05,015 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1] [2024-11-10 18:23:05,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 18:23:05,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 18:23:05,216 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:23:05,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:05,217 INFO L85 PathProgramCache]: Analyzing trace with hash 118302489, now seen corresponding path program 3 times [2024-11-10 18:23:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:05,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769419604] [2024-11-10 18:23:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:05,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:06,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:06,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769419604] [2024-11-10 18:23:06,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769419604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870533402] [2024-11-10 18:23:06,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:23:06,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:06,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:06,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:23:06,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:23:06,386 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 18:23:06,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:23:06,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-10 18:23:06,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:23:06,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:07,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:23:07,027 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 [2024-11-10 18:23:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:23:07,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870533402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:07,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:07,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 10] total 33 [2024-11-10 18:23:07,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330715149] [2024-11-10 18:23:07,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:07,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-10 18:23:07,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-10 18:23:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2024-11-10 18:23:07,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-10 18:23:07,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 631 transitions, 7585 flow. Second operand has 34 states, 34 states have (on average 19.91176470588235) internal successors, (677), 34 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:23:07,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:07,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-10 18:23:07,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:15,672 INFO L124 PetriNetUnfolderBase]: 16291/30443 cut-off events. [2024-11-10 18:23:15,672 INFO L125 PetriNetUnfolderBase]: For 994910/995040 co-relation queries the response was YES. [2024-11-10 18:23:16,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185011 conditions, 30443 events. 16291/30443 cut-off events. For 994910/995040 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 254450 event pairs, 816 based on Foata normal form. 510/30711 useless extension candidates. Maximal degree in co-relation 183932. Up to 3924 conditions per place. [2024-11-10 18:23:16,169 INFO L140 encePairwiseOnDemand]: 42/57 looper letters, 549 selfloop transitions, 270 changer transitions 79/984 dead transitions. [2024-11-10 18:23:16,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 984 transitions, 13430 flow [2024-11-10 18:23:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-10 18:23:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-10 18:23:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 979 transitions. [2024-11-10 18:23:16,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41891313649978607 [2024-11-10 18:23:16,171 INFO L175 Difference]: Start difference. First operand has 343 places, 631 transitions, 7585 flow. Second operand 41 states and 979 transitions. [2024-11-10 18:23:16,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 984 transitions, 13430 flow [2024-11-10 18:23:22,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 984 transitions, 12092 flow, removed 587 selfloop flow, removed 26 redundant places. [2024-11-10 18:23:22,708 INFO L231 Difference]: Finished difference. Result has 361 places, 696 transitions, 7969 flow [2024-11-10 18:23:22,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=7969, PETRI_PLACES=361, PETRI_TRANSITIONS=696} [2024-11-10 18:23:22,708 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 305 predicate places. [2024-11-10 18:23:22,709 INFO L471 AbstractCegarLoop]: Abstraction has has 361 places, 696 transitions, 7969 flow [2024-11-10 18:23:22,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 19.91176470588235) internal successors, (677), 34 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:23:22,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:22,709 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 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, 1, 1] [2024-11-10 18:23:22,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 18:23:22,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:22,910 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:23:22,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:22,910 INFO L85 PathProgramCache]: Analyzing trace with hash 841942253, now seen corresponding path program 4 times [2024-11-10 18:23:22,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:22,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018051363] [2024-11-10 18:23:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:22,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:23:23,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:23,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018051363] [2024-11-10 18:23:23,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018051363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:23,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023805962] [2024-11-10 18:23:23,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 18:23:23,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:23,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:23,027 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:23:23,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:23:23,093 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 18:23:23,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:23:23,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:23:23,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:23:23,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:23:23,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023805962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:23,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:23,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-10 18:23:23,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66828457] [2024-11-10 18:23:23,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:23,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 18:23:23,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:23,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 18:23:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2024-11-10 18:23:23,307 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-11-10 18:23:23,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 696 transitions, 7969 flow. Second operand has 18 states, 18 states have (on average 22.11111111111111) internal successors, (398), 18 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:23:23,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:23,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-11-10 18:23:23,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:26,237 INFO L124 PetriNetUnfolderBase]: 5717/11790 cut-off events. [2024-11-10 18:23:26,237 INFO L125 PetriNetUnfolderBase]: For 364352/364730 co-relation queries the response was YES. [2024-11-10 18:23:26,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76428 conditions, 11790 events. 5717/11790 cut-off events. For 364352/364730 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 90696 event pairs, 1800 based on Foata normal form. 158/11679 useless extension candidates. Maximal degree in co-relation 76325. Up to 7821 conditions per place. [2024-11-10 18:23:26,397 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 225 selfloop transitions, 15 changer transitions 70/352 dead transitions. [2024-11-10 18:23:26,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 352 transitions, 4886 flow [2024-11-10 18:23:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:23:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:23:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 330 transitions. [2024-11-10 18:23:26,398 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44534412955465585 [2024-11-10 18:23:26,398 INFO L175 Difference]: Start difference. First operand has 361 places, 696 transitions, 7969 flow. Second operand 13 states and 330 transitions. [2024-11-10 18:23:26,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 352 transitions, 4886 flow [2024-11-10 18:23:27,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 352 transitions, 4417 flow, removed 159 selfloop flow, removed 40 redundant places. [2024-11-10 18:23:27,008 INFO L231 Difference]: Finished difference. Result has 273 places, 278 transitions, 3177 flow [2024-11-10 18:23:27,008 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3177, PETRI_PLACES=273, PETRI_TRANSITIONS=278} [2024-11-10 18:23:27,008 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 217 predicate places. [2024-11-10 18:23:27,008 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 278 transitions, 3177 flow [2024-11-10 18:23:27,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.11111111111111) internal successors, (398), 18 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:23:27,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:27,009 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2024-11-10 18:23:27,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 18:23:27,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:27,210 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:23:27,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:27,211 INFO L85 PathProgramCache]: Analyzing trace with hash 600539611, now seen corresponding path program 5 times [2024-11-10 18:23:27,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:27,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060374022] [2024-11-10 18:23:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:27,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:23:27,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:27,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060374022] [2024-11-10 18:23:27,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060374022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:27,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835942254] [2024-11-10 18:23:27,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 18:23:27,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:27,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:27,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:23:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:23:27,395 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-10 18:23:27,396 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:23:27,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:23:27,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:23:27,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:23:27,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835942254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:27,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:27,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2024-11-10 18:23:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287675946] [2024-11-10 18:23:27,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:27,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:23:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:27,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:23:27,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:23:27,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-11-10 18:23:27,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 278 transitions, 3177 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:23:27,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:27,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-11-10 18:23:27,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:30,917 INFO L124 PetriNetUnfolderBase]: 9194/18351 cut-off events. [2024-11-10 18:23:30,917 INFO L125 PetriNetUnfolderBase]: For 273510/273990 co-relation queries the response was YES. [2024-11-10 18:23:31,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98103 conditions, 18351 events. 9194/18351 cut-off events. For 273510/273990 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 147436 event pairs, 2459 based on Foata normal form. 260/18196 useless extension candidates. Maximal degree in co-relation 98026. Up to 4060 conditions per place. [2024-11-10 18:23:31,135 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 251 selfloop transitions, 173 changer transitions 1/470 dead transitions. [2024-11-10 18:23:31,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 470 transitions, 6142 flow [2024-11-10 18:23:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:23:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:23:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-11-10 18:23:31,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6210526315789474 [2024-11-10 18:23:31,136 INFO L175 Difference]: Start difference. First operand has 273 places, 278 transitions, 3177 flow. Second operand 5 states and 177 transitions. [2024-11-10 18:23:31,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 470 transitions, 6142 flow [2024-11-10 18:23:31,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 470 transitions, 5798 flow, removed 66 selfloop flow, removed 29 redundant places. [2024-11-10 18:23:31,523 INFO L231 Difference]: Finished difference. Result has 216 places, 377 transitions, 4982 flow [2024-11-10 18:23:31,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4982, PETRI_PLACES=216, PETRI_TRANSITIONS=377} [2024-11-10 18:23:31,524 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 160 predicate places. [2024-11-10 18:23:31,524 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 377 transitions, 4982 flow [2024-11-10 18:23:31,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:23:31,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:31,524 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:31,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 18:23:31,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-10 18:23:31,725 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-10 18:23:31,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:31,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2044208775, now seen corresponding path program 6 times [2024-11-10 18:23:31,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:31,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283804125] [2024-11-10 18:23:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:31,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:32,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283804125] [2024-11-10 18:23:32,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283804125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052386007] [2024-11-10 18:23:32,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 18:23:32,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:32,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:32,927 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:23:32,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:23:32,997 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-10 18:23:32,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:23:32,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-10 18:23:33,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:33,941 INFO L349 Elim1Store]: treesize reduction 99, result has 9.2 percent of original size [2024-11-10 18:23:33,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 27 [2024-11-10 18:23:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:34,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:34,724 INFO L349 Elim1Store]: treesize reduction 50, result has 54.1 percent of original size [2024-11-10 18:23:34,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 88 [2024-11-10 18:23:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:35,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052386007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:35,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:35,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-11-10 18:23:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972329414] [2024-11-10 18:23:35,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:35,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-10 18:23:35,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-10 18:23:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1849, Unknown=0, NotChecked=0, Total=2162 [2024-11-10 18:23:35,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-10 18:23:35,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 377 transitions, 4982 flow. Second operand has 47 states, 47 states have (on average 18.574468085106382) internal successors, (873), 47 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:23:35,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:35,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-10 18:23:35,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand