./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-symm.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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:46:02,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:46:02,670 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:46:02,676 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:46:02,676 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:46:02,700 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:46:02,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:46:02,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:46:02,702 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:46:02,702 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:46:02,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:46:02,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:46:02,703 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:46:02,703 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:46:02,704 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:46:02,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:46:02,706 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:46:02,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:46:02,709 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:46:02,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:46:02,709 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:46:02,709 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:46:02,709 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:46:02,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:46:02,710 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:46:02,710 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:46:02,710 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:46:02,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:46:02,710 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:46:02,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:46:02,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:46:02,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:46:02,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:46:02,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:46:02,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:46:02,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:46:02,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:46:02,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:46:02,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:46:02,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:46:02,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:46:02,714 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:46:02,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-09 10:46:02,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:46:02,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:46:02,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:46:02,948 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:46:02,949 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:46:02,949 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-09 10:46:04,327 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:46:04,459 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:46:04,459 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-09 10:46:04,465 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cfe55351/a60342c5bab949dc97e0d3092fbd5875/FLAGfd5349059 [2024-11-09 10:46:04,475 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cfe55351/a60342c5bab949dc97e0d3092fbd5875 [2024-11-09 10:46:04,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:46:04,478 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:46:04,480 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:46:04,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:46:04,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:46:04,485 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e02d45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04, skipping insertion in model container [2024-11-09 10:46:04,486 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,506 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:46:04,680 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:46:04,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:46:04,695 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:46:04,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:46:04,733 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:46:04,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04 WrapperNode [2024-11-09 10:46:04,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:46:04,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:46:04,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:46:04,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:46:04,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,750 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,785 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 193 [2024-11-09 10:46:04,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:46:04,787 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:46:04,796 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:46:04,796 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:46:04,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,820 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,857 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-09 10:46:04,861 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,861 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,877 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,878 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,881 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,884 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:46:04,885 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:46:04,885 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:46:04,885 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:46:04,886 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (1/1) ... [2024-11-09 10:46:04,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:46:04,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:04,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:46:04,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:46:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:46:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:46:04,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:46:04,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:46:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:46:04,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:46:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:46:04,953 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:46:05,045 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:46:05,047 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:46:05,395 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:46:05,398 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:46:05,684 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:46:05,684 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 10:46:05,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:05 BoogieIcfgContainer [2024-11-09 10:46:05,685 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:46:05,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:46:05,687 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:46:05,690 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:46:05,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:46:04" (1/3) ... [2024-11-09 10:46:05,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e40086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:05, skipping insertion in model container [2024-11-09 10:46:05,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:04" (2/3) ... [2024-11-09 10:46:05,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e40086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:05, skipping insertion in model container [2024-11-09 10:46:05,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:05" (3/3) ... [2024-11-09 10:46:05,694 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-09 10:46:05,709 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:46:05,710 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-09 10:46:05,710 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:46:05,787 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:46:05,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 98 flow [2024-11-09 10:46:05,838 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-11-09 10:46:05,841 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:46:05,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-09 10:46:05,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 42 transitions, 98 flow [2024-11-09 10:46:05,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 39 transitions, 90 flow [2024-11-09 10:46:05,853 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:46:05,859 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;@7b1103ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:46:05,860 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-09 10:46:05,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:46:05,864 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:46:05,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:46:05,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:05,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:46:05,865 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:05,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 664973, now seen corresponding path program 1 times [2024-11-09 10:46:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069819866] [2024-11-09 10:46:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:05,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:06,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:06,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069819866] [2024-11-09 10:46:06,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069819866] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:06,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:06,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:46:06,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922670648] [2024-11-09 10:46:06,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:06,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:46:06,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:06,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:46:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:46:06,131 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-09 10:46:06,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:06,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:06,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-09 10:46:06,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:06,214 INFO L124 PetriNetUnfolderBase]: 39/124 cut-off events. [2024-11-09 10:46:06,215 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-09 10:46:06,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 124 events. 39/124 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 488 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 168. Up to 68 conditions per place. [2024-11-09 10:46:06,219 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 18 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-09 10:46:06,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 122 flow [2024-11-09 10:46:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:46:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:46:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-09 10:46:06,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-09 10:46:06,230 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 90 flow. Second operand 3 states and 77 transitions. [2024-11-09 10:46:06,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 122 flow [2024-11-09 10:46:06,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 114 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:46:06,235 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-11-09 10:46:06,236 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-09 10:46:06,240 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2024-11-09 10:46:06,240 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-11-09 10:46:06,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:06,241 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:06,241 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:46:06,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:46:06,242 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:06,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash 664974, now seen corresponding path program 1 times [2024-11-09 10:46:06,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:06,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684443888] [2024-11-09 10:46:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:06,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:06,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:06,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684443888] [2024-11-09 10:46:06,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684443888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:06,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:06,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:46:06,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750986889] [2024-11-09 10:46:06,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:06,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:06,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:06,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:06,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:06,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-09 10:46:06,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:06,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:06,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-09 10:46:06,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:06,586 INFO L124 PetriNetUnfolderBase]: 41/130 cut-off events. [2024-11-09 10:46:06,587 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:46:06,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 130 events. 41/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 507 event pairs, 22 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 185. Up to 77 conditions per place. [2024-11-09 10:46:06,589 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 23 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-11-09 10:46:06,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 148 flow [2024-11-09 10:46:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:46:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:46:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-09 10:46:06,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-09 10:46:06,593 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 3 states and 84 transitions. [2024-11-09 10:46:06,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 148 flow [2024-11-09 10:46:06,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:46:06,595 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 114 flow [2024-11-09 10:46:06,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-11-09 10:46:06,597 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-11-09 10:46:06,597 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 114 flow [2024-11-09 10:46:06,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:06,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:06,598 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:46:06,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:46:06,599 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:06,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:06,600 INFO L85 PathProgramCache]: Analyzing trace with hash 639061118, now seen corresponding path program 1 times [2024-11-09 10:46:06,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:06,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289493973] [2024-11-09 10:46:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:06,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:06,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:06,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289493973] [2024-11-09 10:46:06,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289493973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:06,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313511302] [2024-11-09 10:46:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:06,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:06,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:06,829 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:06,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:46:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:06,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:46:06,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:06,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:06,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:07,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313511302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:07,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:07,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-09 10:46:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142089777] [2024-11-09 10:46:07,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:07,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:46:07,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:46:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:46:07,188 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-09 10:46:07,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 114 flow. Second operand has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:07,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:07,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-09 10:46:07,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:07,370 INFO L124 PetriNetUnfolderBase]: 43/144 cut-off events. [2024-11-09 10:46:07,371 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:46:07,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 144 events. 43/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 522 event pairs, 22 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 217. Up to 78 conditions per place. [2024-11-09 10:46:07,372 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2024-11-09 10:46:07,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 248 flow [2024-11-09 10:46:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-11-09 10:46:07,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-11-09 10:46:07,374 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 114 flow. Second operand 6 states and 160 transitions. [2024-11-09 10:46:07,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 248 flow [2024-11-09 10:46:07,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:46:07,376 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 198 flow [2024-11-09 10:46:07,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-11-09 10:46:07,376 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-11-09 10:46:07,377 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 198 flow [2024-11-09 10:46:07,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:07,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:07,377 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-09 10:46:07,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:07,577 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 [2024-11-09 10:46:07,580 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:07,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash -425273010, now seen corresponding path program 2 times [2024-11-09 10:46:07,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:07,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447353404] [2024-11-09 10:46:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:07,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:07,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:07,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447353404] [2024-11-09 10:46:07,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447353404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:07,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028196789] [2024-11-09 10:46:07,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:46:07,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:07,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:07,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:07,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:46:08,039 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:46:08,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:46:08,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:46:08,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:08,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:08,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:08,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028196789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:08,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:08,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-09 10:46:08,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47667366] [2024-11-09 10:46:08,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:08,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:46:08,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:08,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:46:08,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:46:08,906 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-09 10:46:08,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 198 flow. Second operand has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:08,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:08,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-09 10:46:08,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:09,171 INFO L124 PetriNetUnfolderBase]: 39/140 cut-off events. [2024-11-09 10:46:09,171 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-09 10:46:09,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 140 events. 39/140 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 481 event pairs, 22 based on Foata normal form. 8/120 useless extension candidates. Maximal degree in co-relation 211. Up to 68 conditions per place. [2024-11-09 10:46:09,173 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 23 selfloop transitions, 15 changer transitions 0/51 dead transitions. [2024-11-09 10:46:09,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 246 flow [2024-11-09 10:46:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:46:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:46:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-11-09 10:46:09,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-11-09 10:46:09,175 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 198 flow. Second operand 8 states and 190 transitions. [2024-11-09 10:46:09,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 246 flow [2024-11-09 10:46:09,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 208 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-09 10:46:09,177 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 156 flow [2024-11-09 10:46:09,177 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-09 10:46:09,180 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-11-09 10:46:09,180 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 156 flow [2024-11-09 10:46:09,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:09,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:09,180 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:09,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:46:09,381 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,SelfDestructingSolverStorable3 [2024-11-09 10:46:09,381 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:09,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:09,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709676, now seen corresponding path program 1 times [2024-11-09 10:46:09,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:09,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218738308] [2024-11-09 10:46:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:09,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 10:46:09,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:09,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218738308] [2024-11-09 10:46:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218738308] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:09,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:09,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:46:09,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127790843] [2024-11-09 10:46:09,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:09,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:46:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:46:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:46:09,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-11-09 10:46:09,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:09,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:09,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-11-09 10:46:09,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:09,711 INFO L124 PetriNetUnfolderBase]: 50/159 cut-off events. [2024-11-09 10:46:09,711 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-09 10:46:09,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 159 events. 50/159 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 570 event pairs, 31 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 224. Up to 86 conditions per place. [2024-11-09 10:46:09,712 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 28 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2024-11-09 10:46:09,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 214 flow [2024-11-09 10:46:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:46:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:46:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-11-09 10:46:09,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-09 10:46:09,716 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 156 flow. Second operand 5 states and 98 transitions. [2024-11-09 10:46:09,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 214 flow [2024-11-09 10:46:09,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 186 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:09,720 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 130 flow [2024-11-09 10:46:09,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2024-11-09 10:46:09,721 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-11-09 10:46:09,721 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 130 flow [2024-11-09 10:46:09,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:09,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:09,721 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:09,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:46:09,721 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:09,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:09,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709675, now seen corresponding path program 1 times [2024-11-09 10:46:09,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:09,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325913442] [2024-11-09 10:46:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:09,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:09,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:09,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325913442] [2024-11-09 10:46:09,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325913442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:09,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471325799] [2024-11-09 10:46:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:09,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:09,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:09,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:09,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:46:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:10,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 10:46:10,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:10,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:10,090 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 [2024-11-09 10:46:10,173 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:10,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 10:46:10,190 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:10,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:10,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471325799] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:10,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:10,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2024-11-09 10:46:10,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226763790] [2024-11-09 10:46:10,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:10,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:46:10,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:46:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2024-11-09 10:46:10,897 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-09 10:46:10,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 130 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:10,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:10,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-09 10:46:10,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:11,019 INFO L124 PetriNetUnfolderBase]: 86/233 cut-off events. [2024-11-09 10:46:11,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:46:11,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 233 events. 86/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 919 event pairs, 31 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 366. Up to 78 conditions per place. [2024-11-09 10:46:11,020 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-11-09 10:46:11,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 241 flow [2024-11-09 10:46:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-11-09 10:46:11,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-11-09 10:46:11,023 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 130 flow. Second operand 6 states and 142 transitions. [2024-11-09 10:46:11,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 241 flow [2024-11-09 10:46:11,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:46:11,024 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 150 flow [2024-11-09 10:46:11,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-11-09 10:46:11,025 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-11-09 10:46:11,025 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 150 flow [2024-11-09 10:46:11,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:11,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:11,026 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:11,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:11,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:11,231 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:11,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash -965391780, now seen corresponding path program 1 times [2024-11-09 10:46:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:11,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761778137] [2024-11-09 10:46:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:11,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 10:46:11,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:11,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761778137] [2024-11-09 10:46:11,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761778137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:11,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:11,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:46:11,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188800798] [2024-11-09 10:46:11,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:11,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:11,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:11,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:11,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-11-09 10:46:11,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:11,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:11,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-11-09 10:46:11,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:11,447 INFO L124 PetriNetUnfolderBase]: 73/200 cut-off events. [2024-11-09 10:46:11,448 INFO L125 PetriNetUnfolderBase]: For 67/72 co-relation queries the response was YES. [2024-11-09 10:46:11,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 200 events. 73/200 cut-off events. For 67/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 730 event pairs, 57 based on Foata normal form. 7/204 useless extension candidates. Maximal degree in co-relation 360. Up to 132 conditions per place. [2024-11-09 10:46:11,449 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 29 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-09 10:46:11,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 208 flow [2024-11-09 10:46:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:46:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:46:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-09 10:46:11,450 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-11-09 10:46:11,450 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 150 flow. Second operand 4 states and 83 transitions. [2024-11-09 10:46:11,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 208 flow [2024-11-09 10:46:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 200 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:46:11,451 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 142 flow [2024-11-09 10:46:11,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-09 10:46:11,451 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-11-09 10:46:11,452 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 142 flow [2024-11-09 10:46:11,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:11,452 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:11,452 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:11,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:46:11,452 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:11,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:11,452 INFO L85 PathProgramCache]: Analyzing trace with hash -965391779, now seen corresponding path program 1 times [2024-11-09 10:46:11,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:11,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625374773] [2024-11-09 10:46:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:11,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 10:46:11,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:11,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625374773] [2024-11-09 10:46:11,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625374773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:11,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709910065] [2024-11-09 10:46:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:11,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:11,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:11,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:11,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:46:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:11,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:46:11,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:11,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:11,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:46:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:12,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709910065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:12,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:12,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-11-09 10:46:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445338956] [2024-11-09 10:46:12,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:12,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:46:12,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:46:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:46:12,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-09 10:46:12,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 142 flow. Second operand has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:12,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:12,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-09 10:46:12,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:12,695 INFO L124 PetriNetUnfolderBase]: 100/275 cut-off events. [2024-11-09 10:46:12,695 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-09 10:46:12,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 275 events. 100/275 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1069 event pairs, 31 based on Foata normal form. 16/274 useless extension candidates. Maximal degree in co-relation 520. Up to 86 conditions per place. [2024-11-09 10:46:12,696 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 14 changer transitions 0/70 dead transitions. [2024-11-09 10:46:12,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 352 flow [2024-11-09 10:46:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:46:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:46:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-11-09 10:46:12,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5976190476190476 [2024-11-09 10:46:12,698 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 142 flow. Second operand 10 states and 251 transitions. [2024-11-09 10:46:12,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 352 flow [2024-11-09 10:46:12,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:46:12,699 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 187 flow [2024-11-09 10:46:12,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=187, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-11-09 10:46:12,700 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-11-09 10:46:12,700 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 187 flow [2024-11-09 10:46:12,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:12,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:12,701 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:12,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:46:12,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:12,905 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:12,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:12,905 INFO L85 PathProgramCache]: Analyzing trace with hash 114216719, now seen corresponding path program 1 times [2024-11-09 10:46:12,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:12,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147377643] [2024-11-09 10:46:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 10:46:13,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:13,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147377643] [2024-11-09 10:46:13,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147377643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:13,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909633019] [2024-11-09 10:46:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:13,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:13,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:13,104 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) [2024-11-09 10:46:13,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:46:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:13,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:46:13,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:13,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:13,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:46:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:13,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909633019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:13,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:13,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-11-09 10:46:13,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412803880] [2024-11-09 10:46:13,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:13,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:46:13,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:13,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:46:13,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:46:13,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-09 10:46:13,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 187 flow. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:13,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:13,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-09 10:46:13,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:14,108 INFO L124 PetriNetUnfolderBase]: 257/591 cut-off events. [2024-11-09 10:46:14,108 INFO L125 PetriNetUnfolderBase]: For 504/521 co-relation queries the response was YES. [2024-11-09 10:46:14,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 591 events. 257/591 cut-off events. For 504/521 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2876 event pairs, 84 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 1331. Up to 183 conditions per place. [2024-11-09 10:46:14,110 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-11-09 10:46:14,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 447 flow [2024-11-09 10:46:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:46:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:46:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-11-09 10:46:14,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-11-09 10:46:14,112 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 187 flow. Second operand 10 states and 239 transitions. [2024-11-09 10:46:14,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 447 flow [2024-11-09 10:46:14,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 426 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:14,113 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 215 flow [2024-11-09 10:46:14,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=215, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-09 10:46:14,114 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-11-09 10:46:14,114 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 215 flow [2024-11-09 10:46:14,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:14,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:14,114 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:14,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:14,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:14,319 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:14,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash -754248404, now seen corresponding path program 1 times [2024-11-09 10:46:14,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:14,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294819437] [2024-11-09 10:46:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:14,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294819437] [2024-11-09 10:46:14,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294819437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:14,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452002162] [2024-11-09 10:46:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:14,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:14,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:14,544 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) [2024-11-09 10:46:14,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:46:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:14,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 10:46:14,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:14,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:14,669 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 10:46:14,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 10:46:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:14,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:15,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452002162] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:15,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:15,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2024-11-09 10:46:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591700976] [2024-11-09 10:46:15,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:15,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:46:15,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:46:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2024-11-09 10:46:15,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-09 10:46:15,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:15,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:15,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-09 10:46:15,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:15,560 INFO L124 PetriNetUnfolderBase]: 206/514 cut-off events. [2024-11-09 10:46:15,560 INFO L125 PetriNetUnfolderBase]: For 547/560 co-relation queries the response was YES. [2024-11-09 10:46:15,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 514 events. 206/514 cut-off events. For 547/560 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2498 event pairs, 128 based on Foata normal form. 17/519 useless extension candidates. Maximal degree in co-relation 1292. Up to 271 conditions per place. [2024-11-09 10:46:15,563 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 39 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-11-09 10:46:15,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 349 flow [2024-11-09 10:46:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-11-09 10:46:15,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-11-09 10:46:15,563 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 215 flow. Second operand 6 states and 145 transitions. [2024-11-09 10:46:15,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 349 flow [2024-11-09 10:46:15,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:15,566 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 208 flow [2024-11-09 10:46:15,566 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-09 10:46:15,566 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-11-09 10:46:15,566 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 208 flow [2024-11-09 10:46:15,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:15,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:15,566 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:15,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:46:15,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:15,767 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:15,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -28541918, now seen corresponding path program 1 times [2024-11-09 10:46:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:15,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976897426] [2024-11-09 10:46:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:16,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976897426] [2024-11-09 10:46:16,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976897426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41105387] [2024-11-09 10:46:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:16,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:16,175 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) [2024-11-09 10:46:16,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:46:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:16,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 10:46:16,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:16,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:16,348 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 10:46:16,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 10:46:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:16,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:16,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41105387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:16,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:16,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-11-09 10:46:16,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4730403] [2024-11-09 10:46:16,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:16,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 10:46:16,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:16,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 10:46:16,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:46:17,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-09 10:46:17,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 208 flow. Second operand has 26 states, 26 states have (on average 16.115384615384617) internal successors, (419), 26 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:17,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:17,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-09 10:46:17,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:18,236 INFO L124 PetriNetUnfolderBase]: 376/879 cut-off events. [2024-11-09 10:46:18,236 INFO L125 PetriNetUnfolderBase]: For 1183/1208 co-relation queries the response was YES. [2024-11-09 10:46:18,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2461 conditions, 879 events. 376/879 cut-off events. For 1183/1208 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4732 event pairs, 75 based on Foata normal form. 48/917 useless extension candidates. Maximal degree in co-relation 2345. Up to 153 conditions per place. [2024-11-09 10:46:18,241 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 76 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-11-09 10:46:18,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 105 transitions, 655 flow [2024-11-09 10:46:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 10:46:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-09 10:46:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 375 transitions. [2024-11-09 10:46:18,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-09 10:46:18,243 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 208 flow. Second operand 20 states and 375 transitions. [2024-11-09 10:46:18,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 105 transitions, 655 flow [2024-11-09 10:46:18,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 627 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:46:18,247 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 297 flow [2024-11-09 10:46:18,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=297, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2024-11-09 10:46:18,248 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-11-09 10:46:18,248 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 297 flow [2024-11-09 10:46:18,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.115384615384617) internal successors, (419), 26 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:18,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:18,249 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:18,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:18,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:18,450 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:18,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1455373354, now seen corresponding path program 1 times [2024-11-09 10:46:18,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:18,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843059241] [2024-11-09 10:46:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:18,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:18,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:18,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843059241] [2024-11-09 10:46:18,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843059241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:18,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647275849] [2024-11-09 10:46:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:18,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:18,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:18,955 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) [2024-11-09 10:46:18,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:46:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:19,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 10:46:19,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:19,115 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 [2024-11-09 10:46:19,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:19,180 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:19,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 10:46:19,190 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:19,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:19,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:19,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647275849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:19,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:19,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-11-09 10:46:19,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250068189] [2024-11-09 10:46:19,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:19,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 10:46:19,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:19,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 10:46:19,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:46:20,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-11-09 10:46:20,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 297 flow. Second operand has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:20,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:20,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-11-09 10:46:20,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:21,069 INFO L124 PetriNetUnfolderBase]: 458/1266 cut-off events. [2024-11-09 10:46:21,069 INFO L125 PetriNetUnfolderBase]: For 2146/2188 co-relation queries the response was YES. [2024-11-09 10:46:21,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 1266 events. 458/1266 cut-off events. For 2146/2188 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8053 event pairs, 138 based on Foata normal form. 81/1329 useless extension candidates. Maximal degree in co-relation 3532. Up to 306 conditions per place. [2024-11-09 10:46:21,076 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 77 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-11-09 10:46:21,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 101 transitions, 795 flow [2024-11-09 10:46:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:46:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:46:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 289 transitions. [2024-11-09 10:46:21,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5293040293040293 [2024-11-09 10:46:21,078 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 297 flow. Second operand 13 states and 289 transitions. [2024-11-09 10:46:21,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 101 transitions, 795 flow [2024-11-09 10:46:21,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 101 transitions, 726 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-09 10:46:21,133 INFO L231 Difference]: Finished difference. Result has 83 places, 53 transitions, 326 flow [2024-11-09 10:46:21,134 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=326, PETRI_PLACES=83, PETRI_TRANSITIONS=53} [2024-11-09 10:46:21,134 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-11-09 10:46:21,136 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 53 transitions, 326 flow [2024-11-09 10:46:21,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:21,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:21,136 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:21,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:21,337 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,SelfDestructingSolverStorable11 [2024-11-09 10:46:21,337 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:21,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash -827986563, now seen corresponding path program 1 times [2024-11-09 10:46:21,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:21,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068018646] [2024-11-09 10:46:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 10:46:21,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068018646] [2024-11-09 10:46:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068018646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259813185] [2024-11-09 10:46:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:21,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:21,564 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) [2024-11-09 10:46:21,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:46:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:21,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:46:21,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:21,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:21,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 10:46:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:22,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259813185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:22,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:22,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-09 10:46:22,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77612133] [2024-11-09 10:46:22,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:22,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 10:46:22,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 10:46:22,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-09 10:46:22,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-09 10:46:22,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 53 transitions, 326 flow. Second operand has 28 states, 28 states have (on average 20.678571428571427) internal successors, (579), 28 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:22,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:22,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-09 10:46:22,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:23,527 INFO L124 PetriNetUnfolderBase]: 560/1433 cut-off events. [2024-11-09 10:46:23,527 INFO L125 PetriNetUnfolderBase]: For 3156/3178 co-relation queries the response was YES. [2024-11-09 10:46:23,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4499 conditions, 1433 events. 560/1433 cut-off events. For 3156/3178 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8959 event pairs, 119 based on Foata normal form. 72/1479 useless extension candidates. Maximal degree in co-relation 4376. Up to 270 conditions per place. [2024-11-09 10:46:23,536 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2024-11-09 10:46:23,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 995 flow [2024-11-09 10:46:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:46:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:46:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 342 transitions. [2024-11-09 10:46:23,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-11-09 10:46:23,537 INFO L175 Difference]: Start difference. First operand has 83 places, 53 transitions, 326 flow. Second operand 13 states and 342 transitions. [2024-11-09 10:46:23,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 995 flow [2024-11-09 10:46:23,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 968 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:46:23,543 INFO L231 Difference]: Finished difference. Result has 90 places, 55 transitions, 377 flow [2024-11-09 10:46:23,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=377, PETRI_PLACES=90, PETRI_TRANSITIONS=55} [2024-11-09 10:46:23,544 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-11-09 10:46:23,544 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 55 transitions, 377 flow [2024-11-09 10:46:23,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.678571428571427) internal successors, (579), 28 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:23,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:23,545 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:23,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:23,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 10:46:23,749 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:23,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1181979473, now seen corresponding path program 1 times [2024-11-09 10:46:23,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:23,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27377731] [2024-11-09 10:46:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:23,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:23,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:23,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27377731] [2024-11-09 10:46:23,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27377731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:23,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:23,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:46:23,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046799732] [2024-11-09 10:46:23,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:23,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:23,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:23,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:23,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-09 10:46:23,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 55 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:23,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:23,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-09 10:46:23,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:24,145 INFO L124 PetriNetUnfolderBase]: 523/1424 cut-off events. [2024-11-09 10:46:24,145 INFO L125 PetriNetUnfolderBase]: For 3510/3548 co-relation queries the response was YES. [2024-11-09 10:46:24,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4612 conditions, 1424 events. 523/1424 cut-off events. For 3510/3548 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9172 event pairs, 380 based on Foata normal form. 2/1390 useless extension candidates. Maximal degree in co-relation 4482. Up to 825 conditions per place. [2024-11-09 10:46:24,154 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 62 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-11-09 10:46:24,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 77 transitions, 687 flow [2024-11-09 10:46:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:46:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:46:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-09 10:46:24,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-09 10:46:24,155 INFO L175 Difference]: Start difference. First operand has 90 places, 55 transitions, 377 flow. Second operand 4 states and 114 transitions. [2024-11-09 10:46:24,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 77 transitions, 687 flow [2024-11-09 10:46:24,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 77 transitions, 647 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-09 10:46:24,161 INFO L231 Difference]: Finished difference. Result has 86 places, 56 transitions, 364 flow [2024-11-09 10:46:24,161 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=86, PETRI_TRANSITIONS=56} [2024-11-09 10:46:24,162 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-11-09 10:46:24,162 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 56 transitions, 364 flow [2024-11-09 10:46:24,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:24,162 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:24,162 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:24,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:46:24,162 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:24,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:24,163 INFO L85 PathProgramCache]: Analyzing trace with hash 595953299, now seen corresponding path program 2 times [2024-11-09 10:46:24,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:24,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697284858] [2024-11-09 10:46:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:24,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:24,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697284858] [2024-11-09 10:46:24,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697284858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:24,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:24,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:46:24,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684225522] [2024-11-09 10:46:24,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:24,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:24,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:24,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:24,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-09 10:46:24,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 56 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:24,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:24,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-09 10:46:24,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:24,450 INFO L124 PetriNetUnfolderBase]: 520/1169 cut-off events. [2024-11-09 10:46:24,450 INFO L125 PetriNetUnfolderBase]: For 3590/3616 co-relation queries the response was YES. [2024-11-09 10:46:24,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4230 conditions, 1169 events. 520/1169 cut-off events. For 3590/3616 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6741 event pairs, 388 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4109. Up to 841 conditions per place. [2024-11-09 10:46:24,456 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 64 selfloop transitions, 3 changer transitions 2/81 dead transitions. [2024-11-09 10:46:24,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 655 flow [2024-11-09 10:46:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:46:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:46:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-09 10:46:24,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-09 10:46:24,457 INFO L175 Difference]: Start difference. First operand has 86 places, 56 transitions, 364 flow. Second operand 4 states and 117 transitions. [2024-11-09 10:46:24,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 655 flow [2024-11-09 10:46:24,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 645 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:46:24,461 INFO L231 Difference]: Finished difference. Result has 89 places, 57 transitions, 376 flow [2024-11-09 10:46:24,462 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=89, PETRI_TRANSITIONS=57} [2024-11-09 10:46:24,463 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-11-09 10:46:24,463 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 57 transitions, 376 flow [2024-11-09 10:46:24,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:24,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:24,464 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:24,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:46:24,464 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:24,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1043574799, now seen corresponding path program 3 times [2024-11-09 10:46:24,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:24,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56017312] [2024-11-09 10:46:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:24,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:24,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:24,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56017312] [2024-11-09 10:46:24,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56017312] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:24,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:24,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:46:24,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709617690] [2024-11-09 10:46:24,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:24,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:24,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:24,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:24,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:24,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-09 10:46:24,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 57 transitions, 376 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:24,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:24,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-09 10:46:24,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:24,853 INFO L124 PetriNetUnfolderBase]: 787/1820 cut-off events. [2024-11-09 10:46:24,853 INFO L125 PetriNetUnfolderBase]: For 5707/5765 co-relation queries the response was YES. [2024-11-09 10:46:24,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6588 conditions, 1820 events. 787/1820 cut-off events. For 5707/5765 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11371 event pairs, 552 based on Foata normal form. 30/1838 useless extension candidates. Maximal degree in co-relation 6465. Up to 1133 conditions per place. [2024-11-09 10:46:24,866 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 68 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2024-11-09 10:46:24,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 733 flow [2024-11-09 10:46:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:46:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:46:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-09 10:46:24,867 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-09 10:46:24,867 INFO L175 Difference]: Start difference. First operand has 89 places, 57 transitions, 376 flow. Second operand 4 states and 114 transitions. [2024-11-09 10:46:24,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 733 flow [2024-11-09 10:46:24,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 83 transitions, 721 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:46:24,872 INFO L231 Difference]: Finished difference. Result has 92 places, 59 transitions, 407 flow [2024-11-09 10:46:24,872 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=407, PETRI_PLACES=92, PETRI_TRANSITIONS=59} [2024-11-09 10:46:24,874 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-11-09 10:46:24,874 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 59 transitions, 407 flow [2024-11-09 10:46:24,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:24,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:24,874 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:24,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 10:46:24,874 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:24,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2028777029, now seen corresponding path program 4 times [2024-11-09 10:46:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:24,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869573148] [2024-11-09 10:46:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:24,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869573148] [2024-11-09 10:46:25,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869573148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:25,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:25,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:46:25,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798235164] [2024-11-09 10:46:25,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:25,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:25,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:25,056 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-09 10:46:25,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 59 transitions, 407 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:25,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:25,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-09 10:46:25,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:25,282 INFO L124 PetriNetUnfolderBase]: 544/1517 cut-off events. [2024-11-09 10:46:25,282 INFO L125 PetriNetUnfolderBase]: For 5707/5732 co-relation queries the response was YES. [2024-11-09 10:46:25,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5798 conditions, 1517 events. 544/1517 cut-off events. For 5707/5732 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10202 event pairs, 18 based on Foata normal form. 30/1533 useless extension candidates. Maximal degree in co-relation 5673. Up to 919 conditions per place. [2024-11-09 10:46:25,296 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 60 selfloop transitions, 6 changer transitions 1/80 dead transitions. [2024-11-09 10:46:25,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 80 transitions, 714 flow [2024-11-09 10:46:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:46:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:46:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-09 10:46:25,298 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-09 10:46:25,298 INFO L175 Difference]: Start difference. First operand has 92 places, 59 transitions, 407 flow. Second operand 4 states and 112 transitions. [2024-11-09 10:46:25,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 80 transitions, 714 flow [2024-11-09 10:46:25,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 80 transitions, 707 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 10:46:25,305 INFO L231 Difference]: Finished difference. Result has 96 places, 60 transitions, 444 flow [2024-11-09 10:46:25,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=444, PETRI_PLACES=96, PETRI_TRANSITIONS=60} [2024-11-09 10:46:25,306 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-11-09 10:46:25,306 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 60 transitions, 444 flow [2024-11-09 10:46:25,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:25,306 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:25,306 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:25,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:46:25,306 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:25,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1545523249, now seen corresponding path program 1 times [2024-11-09 10:46:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:25,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733894489] [2024-11-09 10:46:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 10:46:25,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:25,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733894489] [2024-11-09 10:46:25,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733894489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:25,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429034789] [2024-11-09 10:46:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:25,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:25,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:25,621 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) [2024-11-09 10:46:25,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:46:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:25,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:46:25,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:25,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:26,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 10:46:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:26,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429034789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:26,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:26,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-09 10:46:26,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943868897] [2024-11-09 10:46:26,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:26,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 10:46:26,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:26,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 10:46:26,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-09 10:46:26,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-09 10:46:26,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 60 transitions, 444 flow. Second operand has 28 states, 28 states have (on average 20.107142857142858) internal successors, (563), 28 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:26,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:26,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-09 10:46:26,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:27,415 INFO L124 PetriNetUnfolderBase]: 947/2069 cut-off events. [2024-11-09 10:46:27,415 INFO L125 PetriNetUnfolderBase]: For 8668/8726 co-relation queries the response was YES. [2024-11-09 10:46:27,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8123 conditions, 2069 events. 947/2069 cut-off events. For 8668/8726 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12502 event pairs, 170 based on Foata normal form. 96/2125 useless extension candidates. Maximal degree in co-relation 7995. Up to 344 conditions per place. [2024-11-09 10:46:27,433 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 108 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-11-09 10:46:27,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 139 transitions, 1297 flow [2024-11-09 10:46:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:46:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:46:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 321 transitions. [2024-11-09 10:46:27,434 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-11-09 10:46:27,434 INFO L175 Difference]: Start difference. First operand has 96 places, 60 transitions, 444 flow. Second operand 13 states and 321 transitions. [2024-11-09 10:46:27,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 139 transitions, 1297 flow [2024-11-09 10:46:27,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1278 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-09 10:46:27,443 INFO L231 Difference]: Finished difference. Result has 107 places, 61 transitions, 498 flow [2024-11-09 10:46:27,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=498, PETRI_PLACES=107, PETRI_TRANSITIONS=61} [2024-11-09 10:46:27,443 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-11-09 10:46:27,443 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 61 transitions, 498 flow [2024-11-09 10:46:27,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.107142857142858) internal successors, (563), 28 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:27,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:27,443 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:27,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:46:27,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:46:27,645 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:27,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash 969379333, now seen corresponding path program 1 times [2024-11-09 10:46:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:27,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710507586] [2024-11-09 10:46:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:27,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:27,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:27,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710507586] [2024-11-09 10:46:27,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710507586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:27,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:27,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:46:27,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403331140] [2024-11-09 10:46:27,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:27,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:27,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:27,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:27,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:27,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-09 10:46:27,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 61 transitions, 498 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) [2024-11-09 10:46:27,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:27,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-09 10:46:27,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:28,012 INFO L124 PetriNetUnfolderBase]: 908/2209 cut-off events. [2024-11-09 10:46:28,012 INFO L125 PetriNetUnfolderBase]: For 10585/10640 co-relation queries the response was YES. [2024-11-09 10:46:28,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8906 conditions, 2209 events. 908/2209 cut-off events. For 10585/10640 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 14465 event pairs, 611 based on Foata normal form. 22/2215 useless extension candidates. Maximal degree in co-relation 8765. Up to 1328 conditions per place. [2024-11-09 10:46:28,029 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 69 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-11-09 10:46:28,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 87 transitions, 866 flow [2024-11-09 10:46:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:46:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:46:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-09 10:46:28,030 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-09 10:46:28,030 INFO L175 Difference]: Start difference. First operand has 107 places, 61 transitions, 498 flow. Second operand 4 states and 117 transitions. [2024-11-09 10:46:28,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 87 transitions, 866 flow [2024-11-09 10:46:28,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 87 transitions, 798 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-09 10:46:28,042 INFO L231 Difference]: Finished difference. Result has 101 places, 63 transitions, 498 flow [2024-11-09 10:46:28,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=498, PETRI_PLACES=101, PETRI_TRANSITIONS=63} [2024-11-09 10:46:28,042 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-11-09 10:46:28,042 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 63 transitions, 498 flow [2024-11-09 10:46:28,042 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) [2024-11-09 10:46:28,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:28,043 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:28,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-09 10:46:28,043 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:28,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash 747439645, now seen corresponding path program 2 times [2024-11-09 10:46:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:28,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426218333] [2024-11-09 10:46:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:28,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 10:46:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:28,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426218333] [2024-11-09 10:46:28,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426218333] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:28,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:28,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:46:28,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049554692] [2024-11-09 10:46:28,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:28,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:28,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:28,167 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-09 10:46:28,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 63 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:28,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:28,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-09 10:46:28,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:28,355 INFO L124 PetriNetUnfolderBase]: 628/1691 cut-off events. [2024-11-09 10:46:28,355 INFO L125 PetriNetUnfolderBase]: For 9290/9358 co-relation queries the response was YES. [2024-11-09 10:46:28,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 1691 events. 628/1691 cut-off events. For 9290/9358 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11073 event pairs, 46 based on Foata normal form. 22/1696 useless extension candidates. Maximal degree in co-relation 6912. Up to 952 conditions per place. [2024-11-09 10:46:28,366 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 57 selfloop transitions, 8 changer transitions 1/81 dead transitions. [2024-11-09 10:46:28,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 81 transitions, 806 flow [2024-11-09 10:46:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:46:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:46:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-11-09 10:46:28,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-11-09 10:46:28,366 INFO L175 Difference]: Start difference. First operand has 101 places, 63 transitions, 498 flow. Second operand 4 states and 110 transitions. [2024-11-09 10:46:28,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 81 transitions, 806 flow [2024-11-09 10:46:28,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 81 transitions, 798 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 10:46:28,375 INFO L231 Difference]: Finished difference. Result has 105 places, 64 transitions, 546 flow [2024-11-09 10:46:28,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=546, PETRI_PLACES=105, PETRI_TRANSITIONS=64} [2024-11-09 10:46:28,376 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-11-09 10:46:28,376 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 64 transitions, 546 flow [2024-11-09 10:46:28,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:28,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:28,376 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:28,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-09 10:46:28,376 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:28,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:28,377 INFO L85 PathProgramCache]: Analyzing trace with hash -117255083, now seen corresponding path program 2 times [2024-11-09 10:46:28,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:28,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273719263] [2024-11-09 10:46:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:28,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 10:46:28,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273719263] [2024-11-09 10:46:28,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273719263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170922648] [2024-11-09 10:46:28,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:46:28,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:28,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:28,784 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) [2024-11-09 10:46:28,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:46:28,884 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:46:28,884 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:46:28,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 10:46:28,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:28,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:28,932 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 10:46:28,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 10:46:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:29,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:29,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170922648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:29,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:29,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 35 [2024-11-09 10:46:29,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015413249] [2024-11-09 10:46:29,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:29,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 10:46:29,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:29,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 10:46:29,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 10:46:30,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-11-09 10:46:30,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 64 transitions, 546 flow. Second operand has 37 states, 37 states have (on average 17.945945945945947) internal successors, (664), 37 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:30,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:30,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-11-09 10:46:30,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:32,006 INFO L124 PetriNetUnfolderBase]: 928/2016 cut-off events. [2024-11-09 10:46:32,007 INFO L125 PetriNetUnfolderBase]: For 13212/13271 co-relation queries the response was YES. [2024-11-09 10:46:32,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8727 conditions, 2016 events. 928/2016 cut-off events. For 13212/13271 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12246 event pairs, 143 based on Foata normal form. 28/2002 useless extension candidates. Maximal degree in co-relation 8592. Up to 342 conditions per place. [2024-11-09 10:46:32,019 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 121 selfloop transitions, 26 changer transitions 0/158 dead transitions. [2024-11-09 10:46:32,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 158 transitions, 1554 flow [2024-11-09 10:46:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 10:46:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-09 10:46:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 460 transitions. [2024-11-09 10:46:32,021 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-11-09 10:46:32,021 INFO L175 Difference]: Start difference. First operand has 105 places, 64 transitions, 546 flow. Second operand 22 states and 460 transitions. [2024-11-09 10:46:32,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 158 transitions, 1554 flow [2024-11-09 10:46:32,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 158 transitions, 1532 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-09 10:46:32,032 INFO L231 Difference]: Finished difference. Result has 123 places, 65 transitions, 604 flow [2024-11-09 10:46:32,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=604, PETRI_PLACES=123, PETRI_TRANSITIONS=65} [2024-11-09 10:46:32,032 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-11-09 10:46:32,032 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 65 transitions, 604 flow [2024-11-09 10:46:32,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 17.945945945945947) internal successors, (664), 37 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:32,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:32,033 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:32,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:46:32,236 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 [2024-11-09 10:46:32,237 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:32,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash -438428342, now seen corresponding path program 1 times [2024-11-09 10:46:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:32,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039824837] [2024-11-09 10:46:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:32,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:32,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039824837] [2024-11-09 10:46:32,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039824837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:32,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259130168] [2024-11-09 10:46:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:32,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:32,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:32,843 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) [2024-11-09 10:46:32,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:46:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:32,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 10:46:32,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:33,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:46:33,071 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 27 treesize of output 23 [2024-11-09 10:46:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:33,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:49,920 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-09 10:46:49,920 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 50 treesize of output 50 [2024-11-09 10:46:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:49,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259130168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:49,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:49,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-09 10:46:49,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405703094] [2024-11-09 10:46:49,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:49,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 10:46:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 10:46:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=636, Unknown=4, NotChecked=0, Total=756 [2024-11-09 10:46:53,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:46:58,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:02,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:06,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:10,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:14,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:18,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:22,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:26,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:30,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:34,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:47:34,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-11-09 10:47:34,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 65 transitions, 604 flow. Second operand has 28 states, 28 states have (on average 8.107142857142858) internal successors, (227), 28 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:34,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:34,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-11-09 10:47:34,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:35,850 INFO L124 PetriNetUnfolderBase]: 2633/4554 cut-off events. [2024-11-09 10:47:35,850 INFO L125 PetriNetUnfolderBase]: For 21150/21150 co-relation queries the response was YES. [2024-11-09 10:47:35,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19577 conditions, 4554 events. 2633/4554 cut-off events. For 21150/21150 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 24024 event pairs, 1174 based on Foata normal form. 1/4555 useless extension candidates. Maximal degree in co-relation 19428. Up to 3704 conditions per place. [2024-11-09 10:47:35,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 23 changer transitions 3/137 dead transitions. [2024-11-09 10:47:35,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 137 transitions, 1399 flow [2024-11-09 10:47:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:47:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:47:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 173 transitions. [2024-11-09 10:47:35,884 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2942176870748299 [2024-11-09 10:47:35,884 INFO L175 Difference]: Start difference. First operand has 123 places, 65 transitions, 604 flow. Second operand 14 states and 173 transitions. [2024-11-09 10:47:35,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 137 transitions, 1399 flow [2024-11-09 10:47:35,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1337 flow, removed 1 selfloop flow, removed 20 redundant places. [2024-11-09 10:47:35,905 INFO L231 Difference]: Finished difference. Result has 122 places, 78 transitions, 780 flow [2024-11-09 10:47:35,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=780, PETRI_PLACES=122, PETRI_TRANSITIONS=78} [2024-11-09 10:47:35,906 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-11-09 10:47:35,906 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 78 transitions, 780 flow [2024-11-09 10:47:35,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.107142857142858) internal successors, (227), 28 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:35,906 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:35,906 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:35,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:36,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 10:47:36,107 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:47:36,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:36,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1161539514, now seen corresponding path program 2 times [2024-11-09 10:47:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:36,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146457247] [2024-11-09 10:47:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:36,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:36,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:36,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146457247] [2024-11-09 10:47:36,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146457247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:36,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580975835] [2024-11-09 10:47:36,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:47:36,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:36,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:36,784 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:36,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:47:36,899 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:47:36,899 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:47:36,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 10:47:36,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:37,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:47:37,076 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 27 treesize of output 19 [2024-11-09 10:47:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:37,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:37,735 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-09 10:47:37,735 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 40 treesize of output 56 [2024-11-09 10:47:37,753 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-09 10:47:37,753 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 19 treesize of output 11 [2024-11-09 10:47:37,764 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-09 10:47:37,764 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 58 treesize of output 1 [2024-11-09 10:47:37,781 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-09 10:47:37,781 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 58 treesize of output 1 [2024-11-09 10:47:37,794 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-09 10:47:37,794 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 40 treesize of output 1 [2024-11-09 10:47:37,803 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-09 10:47:37,803 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 58 treesize of output 1 [2024-11-09 10:47:37,811 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-09 10:47:37,812 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 58 treesize of output 1 [2024-11-09 10:47:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:37,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580975835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:37,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:37,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 25 [2024-11-09 10:47:37,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967418252] [2024-11-09 10:47:37,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:37,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 10:47:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 10:47:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:47:38,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-11-09 10:47:38,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 78 transitions, 780 flow. Second operand has 25 states, 25 states have (on average 18.2) internal successors, (455), 25 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:38,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:38,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-11-09 10:47:38,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:39,833 INFO L124 PetriNetUnfolderBase]: 2393/4360 cut-off events. [2024-11-09 10:47:39,833 INFO L125 PetriNetUnfolderBase]: For 23064/23072 co-relation queries the response was YES. [2024-11-09 10:47:39,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19693 conditions, 4360 events. 2393/4360 cut-off events. For 23064/23072 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 24434 event pairs, 1181 based on Foata normal form. 1/4361 useless extension candidates. Maximal degree in co-relation 19551. Up to 3289 conditions per place. [2024-11-09 10:47:39,866 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 101 selfloop transitions, 34 changer transitions 2/142 dead transitions. [2024-11-09 10:47:39,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 142 transitions, 1510 flow [2024-11-09 10:47:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:47:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:47:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 313 transitions. [2024-11-09 10:47:39,867 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.532312925170068 [2024-11-09 10:47:39,867 INFO L175 Difference]: Start difference. First operand has 122 places, 78 transitions, 780 flow. Second operand 14 states and 313 transitions. [2024-11-09 10:47:39,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 142 transitions, 1510 flow [2024-11-09 10:47:39,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 142 transitions, 1436 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-09 10:47:39,897 INFO L231 Difference]: Finished difference. Result has 136 places, 96 transitions, 1058 flow [2024-11-09 10:47:39,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1058, PETRI_PLACES=136, PETRI_TRANSITIONS=96} [2024-11-09 10:47:39,898 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-11-09 10:47:39,898 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 96 transitions, 1058 flow [2024-11-09 10:47:39,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.2) internal successors, (455), 25 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:39,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:39,899 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:39,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:40,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 10:47:40,103 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:47:40,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1430750380, now seen corresponding path program 3 times [2024-11-09 10:47:40,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:40,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805291773] [2024-11-09 10:47:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:40,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat