./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-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-word-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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:48:03,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:48:03,944 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:48:03,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:48:03,951 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:48:03,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:48:03,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:48:03,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:48:03,987 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:48:03,990 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:48:03,991 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:48:03,991 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:48:03,992 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:48:03,992 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:48:03,992 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:48:03,993 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:48:03,993 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:48:03,993 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:48:03,993 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:48:03,994 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:48:03,994 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:48:03,994 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:48:03,995 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:48:03,995 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:48:03,995 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:48:03,995 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:48:03,996 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:48:03,996 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:48:03,996 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:48:03,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:48:03,997 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:48:03,997 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:48:03,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:48:03,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:48:03,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:48:03,998 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:48:03,998 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:48:03,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:48:03,999 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:48:03,999 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:48:03,999 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:48:04,000 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:48:04,000 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-11-09 10:48:04,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:48:04,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:48:04,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:48:04,305 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:48:04,305 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:48:04,307 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-09 10:48:05,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:48:05,966 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:48:05,967 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-09 10:48:05,977 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71cc33875/c39b66970ca94618aa9791463851183e/FLAGb482153d3 [2024-11-09 10:48:06,357 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71cc33875/c39b66970ca94618aa9791463851183e [2024-11-09 10:48:06,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:48:06,361 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:48:06,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:48:06,366 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:48:06,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:48:06,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b42eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06, skipping insertion in model container [2024-11-09 10:48:06,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,402 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:48:06,632 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 10:48:06,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:48:06,646 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:48:06,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:48:06,692 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:48:06,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06 WrapperNode [2024-11-09 10:48:06,693 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:48:06,694 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:48:06,694 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:48:06,694 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:48:06,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,707 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,729 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 125 [2024-11-09 10:48:06,730 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:48:06,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:48:06,731 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:48:06,731 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:48:06,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,750 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,767 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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 10:48:06,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,789 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,792 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:48:06,793 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:48:06,793 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:48:06,794 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:48:06,794 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (1/1) ... [2024-11-09 10:48:06,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:48:06,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:06,832 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 10:48:06,836 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 10:48:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:48:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:48:06,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:48:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:48:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:48:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:48:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:48:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:48:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:48:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:48:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:48:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:48:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:48:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:48:06,891 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 10:48:07,011 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:48:07,013 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:48:07,528 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:48:07,528 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:48:07,785 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:48:07,786 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 10:48:07,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:07 BoogieIcfgContainer [2024-11-09 10:48:07,787 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:48:07,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:48:07,789 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:48:07,792 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:48:07,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:48:06" (1/3) ... [2024-11-09 10:48:07,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68967348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:07, skipping insertion in model container [2024-11-09 10:48:07,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:06" (2/3) ... [2024-11-09 10:48:07,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68967348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:07, skipping insertion in model container [2024-11-09 10:48:07,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:07" (3/3) ... [2024-11-09 10:48:07,795 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-11-09 10:48:07,808 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:48:07,809 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-09 10:48:07,809 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:48:07,871 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:48:07,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-11-09 10:48:07,951 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-11-09 10:48:07,951 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:48:07,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 174 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-09 10:48:07,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-11-09 10:48:07,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-11-09 10:48:07,973 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:48:07,980 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;@5a16e2a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:48:07,982 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-09 10:48:07,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:48:07,989 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:48:07,989 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:48:07,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:07,990 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:48:07,993 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:07,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash 580331, now seen corresponding path program 1 times [2024-11-09 10:48:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:08,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292869341] [2024-11-09 10:48:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:08,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:08,287 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 10:48:08,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:08,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292869341] [2024-11-09 10:48:08,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292869341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:08,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:08,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:48:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814210937] [2024-11-09 10:48:08,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:08,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:48:08,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:48:08,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:48:08,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-09 10:48:08,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:08,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:08,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-09 10:48:08,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:08,628 INFO L124 PetriNetUnfolderBase]: 233/554 cut-off events. [2024-11-09 10:48:08,628 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-09 10:48:08,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 554 events. 233/554 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2985 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 872. Up to 354 conditions per place. [2024-11-09 10:48:08,638 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 30 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-09 10:48:08,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 194 flow [2024-11-09 10:48:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:48:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:48:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-09 10:48:08,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2024-11-09 10:48:08,655 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 125 transitions. [2024-11-09 10:48:08,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 194 flow [2024-11-09 10:48:08,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:48:08,665 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-11-09 10:48:08,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-11-09 10:48:08,673 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-11-09 10:48:08,675 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-11-09 10:48:08,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:08,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:08,676 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:48:08,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:48:08,677 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:08,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash 580332, now seen corresponding path program 1 times [2024-11-09 10:48:08,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:08,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98991350] [2024-11-09 10:48:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:08,995 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 10:48:08,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:08,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98991350] [2024-11-09 10:48:08,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98991350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:08,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:08,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:48:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317011679] [2024-11-09 10:48:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:09,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:48:09,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:09,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:48:09,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:48:09,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-09 10:48:09,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 10:48:09,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:09,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-09 10:48:09,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:09,280 INFO L124 PetriNetUnfolderBase]: 234/557 cut-off events. [2024-11-09 10:48:09,280 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-09 10:48:09,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 557 events. 234/557 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3000 event pairs, 138 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 905. Up to 363 conditions per place. [2024-11-09 10:48:09,288 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 33 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-09 10:48:09,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 206 flow [2024-11-09 10:48:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:48:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:48:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-09 10:48:09,291 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-11-09 10:48:09,291 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 4 states and 158 transitions. [2024-11-09 10:48:09,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 206 flow [2024-11-09 10:48:09,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:09,295 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 149 flow [2024-11-09 10:48:09,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-11-09 10:48:09,297 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-11-09 10:48:09,298 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 149 flow [2024-11-09 10:48:09,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 10:48:09,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:09,298 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:48:09,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:48:09,299 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:09,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 17991939, now seen corresponding path program 1 times [2024-11-09 10:48:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:09,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435244864] [2024-11-09 10:48:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:09,517 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 10:48:09,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:09,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435244864] [2024-11-09 10:48:09,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435244864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:09,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:09,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:48:09,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42564112] [2024-11-09 10:48:09,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:09,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:09,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:09,656 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-09 10:48:09,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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 10:48:09,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:09,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-09 10:48:09,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:09,830 INFO L124 PetriNetUnfolderBase]: 235/560 cut-off events. [2024-11-09 10:48:09,830 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-09 10:48:09,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 560 events. 235/560 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3026 event pairs, 138 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 926. Up to 362 conditions per place. [2024-11-09 10:48:09,835 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 33 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-09 10:48:09,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 235 flow [2024-11-09 10:48:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:48:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:48:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-09 10:48:09,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787878787878787 [2024-11-09 10:48:09,839 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 149 flow. Second operand 5 states and 191 transitions. [2024-11-09 10:48:09,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 235 flow [2024-11-09 10:48:09,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:48:09,843 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 183 flow [2024-11-09 10:48:09,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-11-09 10:48:09,844 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-09 10:48:09,845 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 183 flow [2024-11-09 10:48:09,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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 10:48:09,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:09,846 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:48:09,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:48:09,846 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:09,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:09,847 INFO L85 PathProgramCache]: Analyzing trace with hash 557718160, now seen corresponding path program 1 times [2024-11-09 10:48:09,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:09,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099490344] [2024-11-09 10:48:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:09,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:10,024 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 10:48:10,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:10,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099490344] [2024-11-09 10:48:10,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099490344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:10,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592872054] [2024-11-09 10:48:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:10,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:10,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:10,028 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 10:48:10,029 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 10:48:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:10,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:48:10,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:10,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:48:10,371 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 10:48:10,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:10,490 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 10:48:10,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592872054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:10,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:10,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:48:10,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804965495] [2024-11-09 10:48:10,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:10,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:48:10,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:10,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:48:10,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:48:10,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-09 10:48:10,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 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 10:48:10,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:10,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-09 10:48:10,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:11,180 INFO L124 PetriNetUnfolderBase]: 236/562 cut-off events. [2024-11-09 10:48:11,181 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-09 10:48:11,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 562 events. 236/562 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3043 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 936. Up to 363 conditions per place. [2024-11-09 10:48:11,187 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 32 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-11-09 10:48:11,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 278 flow [2024-11-09 10:48:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:48:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:48:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2024-11-09 10:48:11,190 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5321969696969697 [2024-11-09 10:48:11,190 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 183 flow. Second operand 8 states and 281 transitions. [2024-11-09 10:48:11,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 278 flow [2024-11-09 10:48:11,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:48:11,194 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 213 flow [2024-11-09 10:48:11,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=213, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-11-09 10:48:11,195 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-09 10:48:11,196 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 213 flow [2024-11-09 10:48:11,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 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 10:48:11,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:11,197 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:48:11,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:48:11,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:11,398 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:11,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash 110403512, now seen corresponding path program 1 times [2024-11-09 10:48:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:11,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795661836] [2024-11-09 10:48:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:11,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:11,609 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 10:48:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:11,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795661836] [2024-11-09 10:48:11,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795661836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:11,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494662051] [2024-11-09 10:48:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:11,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:11,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:11,612 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 10:48:11,614 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 10:48:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:11,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:48:11,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:11,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:48:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:11,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:12,128 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 10:48:12,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494662051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:12,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:12,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:48:12,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7098682] [2024-11-09 10:48:12,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:12,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:48:12,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:12,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:48:12,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:48:12,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-09 10:48:12,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 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 10:48:12,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:12,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-09 10:48:12,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:13,026 INFO L124 PetriNetUnfolderBase]: 236/561 cut-off events. [2024-11-09 10:48:13,026 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-09 10:48:13,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 561 events. 236/561 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3046 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 935. Up to 354 conditions per place. [2024-11-09 10:48:13,031 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 26 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2024-11-09 10:48:13,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 291 flow [2024-11-09 10:48:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:48:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:48:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 249 transitions. [2024-11-09 10:48:13,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-11-09 10:48:13,036 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 213 flow. Second operand 7 states and 249 transitions. [2024-11-09 10:48:13,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 291 flow [2024-11-09 10:48:13,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 244 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-09 10:48:13,039 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 192 flow [2024-11-09 10:48:13,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-09 10:48:13,040 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-09 10:48:13,040 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 192 flow [2024-11-09 10:48:13,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 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 10:48:13,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:13,041 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:13,059 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 10:48:13,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:13,248 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:13,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1179744335, now seen corresponding path program 1 times [2024-11-09 10:48:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:13,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179945167] [2024-11-09 10:48:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:13,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:13,329 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 10:48:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:13,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179945167] [2024-11-09 10:48:13,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179945167] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:13,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:13,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:48:13,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425745050] [2024-11-09 10:48:13,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:13,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:13,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:13,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:13,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-09 10:48:13,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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 10:48:13,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:13,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-09 10:48:13,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:13,569 INFO L124 PetriNetUnfolderBase]: 436/1017 cut-off events. [2024-11-09 10:48:13,570 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-09 10:48:13,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 1017 events. 436/1017 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6237 event pairs, 234 based on Foata normal form. 0/690 useless extension candidates. Maximal degree in co-relation 1049. Up to 409 conditions per place. [2024-11-09 10:48:13,576 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 75 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2024-11-09 10:48:13,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 467 flow [2024-11-09 10:48:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:48:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:48:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 263 transitions. [2024-11-09 10:48:13,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6641414141414141 [2024-11-09 10:48:13,578 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 192 flow. Second operand 6 states and 263 transitions. [2024-11-09 10:48:13,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 467 flow [2024-11-09 10:48:13,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 426 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-09 10:48:13,583 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 210 flow [2024-11-09 10:48:13,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-11-09 10:48:13,583 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-09 10:48:13,585 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 210 flow [2024-11-09 10:48:13,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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 10:48:13,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:13,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:13,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:48:13,585 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:13,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash 148683071, now seen corresponding path program 1 times [2024-11-09 10:48:13,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:13,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535836542] [2024-11-09 10:48:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:13,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:13,672 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 10:48:13,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:13,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535836542] [2024-11-09 10:48:13,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535836542] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:13,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:13,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:48:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849778290] [2024-11-09 10:48:13,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:13,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:48:13,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:48:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:48:13,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-09 10:48:13,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 10:48:13,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:13,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-09 10:48:13,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:13,852 INFO L124 PetriNetUnfolderBase]: 532/1174 cut-off events. [2024-11-09 10:48:13,852 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-11-09 10:48:13,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 1174 events. 532/1174 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6996 event pairs, 356 based on Foata normal form. 0/942 useless extension candidates. Maximal degree in co-relation 1320. Up to 832 conditions per place. [2024-11-09 10:48:13,861 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 44 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-09 10:48:13,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 298 flow [2024-11-09 10:48:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:48:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:48:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-11-09 10:48:13,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2024-11-09 10:48:13,864 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 210 flow. Second operand 4 states and 131 transitions. [2024-11-09 10:48:13,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 298 flow [2024-11-09 10:48:13,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:13,869 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 205 flow [2024-11-09 10:48:13,870 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-09 10:48:13,871 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-09 10:48:13,871 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 205 flow [2024-11-09 10:48:13,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 10:48:13,873 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:13,873 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:13,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:48:13,873 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:13,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash 148683072, now seen corresponding path program 1 times [2024-11-09 10:48:13,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:13,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233859214] [2024-11-09 10:48:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:13,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:13,961 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 10:48:13,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:13,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233859214] [2024-11-09 10:48:13,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233859214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:13,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:13,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:48:13,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430746597] [2024-11-09 10:48:13,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:13,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:13,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:13,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:13,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-09 10:48:13,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 10:48:13,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:13,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-09 10:48:13,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:14,168 INFO L124 PetriNetUnfolderBase]: 390/782 cut-off events. [2024-11-09 10:48:14,168 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-11-09 10:48:14,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 782 events. 390/782 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3772 event pairs, 224 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 1073. Up to 407 conditions per place. [2024-11-09 10:48:14,174 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 68 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-09 10:48:14,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 436 flow [2024-11-09 10:48:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:48:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:48:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-09 10:48:14,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-11-09 10:48:14,175 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 205 flow. Second operand 6 states and 256 transitions. [2024-11-09 10:48:14,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 436 flow [2024-11-09 10:48:14,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:14,179 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 230 flow [2024-11-09 10:48:14,180 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-09 10:48:14,182 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2024-11-09 10:48:14,182 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 230 flow [2024-11-09 10:48:14,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 10:48:14,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:14,184 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:14,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:48:14,184 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:14,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1430032755, now seen corresponding path program 1 times [2024-11-09 10:48:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:14,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505117652] [2024-11-09 10:48:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:14,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:14,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:14,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505117652] [2024-11-09 10:48:14,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505117652] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:14,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:14,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:48:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452538288] [2024-11-09 10:48:14,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:14,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:14,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:14,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-09 10:48:14,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 10:48:14,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:14,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-09 10:48:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:14,494 INFO L124 PetriNetUnfolderBase]: 688/1466 cut-off events. [2024-11-09 10:48:14,494 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2024-11-09 10:48:14,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 1466 events. 688/1466 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8753 event pairs, 398 based on Foata normal form. 16/1250 useless extension candidates. Maximal degree in co-relation 2077. Up to 630 conditions per place. [2024-11-09 10:48:14,506 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 77 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-11-09 10:48:14,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 527 flow [2024-11-09 10:48:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:48:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:48:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-09 10:48:14,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6848484848484848 [2024-11-09 10:48:14,511 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 230 flow. Second operand 5 states and 226 transitions. [2024-11-09 10:48:14,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 527 flow [2024-11-09 10:48:14,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 519 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:48:14,515 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 284 flow [2024-11-09 10:48:14,515 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-09 10:48:14,516 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2024-11-09 10:48:14,516 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 284 flow [2024-11-09 10:48:14,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 10:48:14,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:14,517 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:14,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:48:14,517 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:14,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1839389634, now seen corresponding path program 1 times [2024-11-09 10:48:14,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:14,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496382855] [2024-11-09 10:48:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:14,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:14,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:14,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496382855] [2024-11-09 10:48:14,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496382855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:14,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:14,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:48:14,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615371892] [2024-11-09 10:48:14,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:14,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:14,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:14,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-09 10:48:14,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 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 10:48:14,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:14,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-09 10:48:14,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:14,840 INFO L124 PetriNetUnfolderBase]: 766/1532 cut-off events. [2024-11-09 10:48:14,841 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-11-09 10:48:14,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3464 conditions, 1532 events. 766/1532 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8561 event pairs, 540 based on Foata normal form. 0/1402 useless extension candidates. Maximal degree in co-relation 2237. Up to 1240 conditions per place. [2024-11-09 10:48:14,850 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 47 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-09 10:48:14,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 384 flow [2024-11-09 10:48:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:48:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:48:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-09 10:48:14,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-09 10:48:14,852 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 284 flow. Second operand 5 states and 154 transitions. [2024-11-09 10:48:14,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 384 flow [2024-11-09 10:48:14,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:48:14,856 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 285 flow [2024-11-09 10:48:14,856 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-09 10:48:14,856 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-09 10:48:14,857 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 285 flow [2024-11-09 10:48:14,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 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 10:48:14,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:14,857 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:14,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:48:14,858 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:14,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1839389635, now seen corresponding path program 1 times [2024-11-09 10:48:14,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:14,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632067869] [2024-11-09 10:48:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:15,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632067869] [2024-11-09 10:48:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632067869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501734679] [2024-11-09 10:48:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:15,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:15,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:15,025 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 10:48:15,026 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 10:48:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:15,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:48:15,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:15,104 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 10:48:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:48:15,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:48:15,164 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:48:15,164 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 10:48:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:15,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:15,325 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 52 treesize of output 48 [2024-11-09 10:48:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:15,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501734679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:15,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:15,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:48:15,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507098626] [2024-11-09 10:48:15,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:15,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:48:15,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:48:15,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:48:16,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-09 10:48:16,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 285 flow. Second operand has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 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 10:48:16,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:16,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-09 10:48:16,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:16,663 INFO L124 PetriNetUnfolderBase]: 936/1764 cut-off events. [2024-11-09 10:48:16,664 INFO L125 PetriNetUnfolderBase]: For 846/846 co-relation queries the response was YES. [2024-11-09 10:48:16,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1764 events. 936/1764 cut-off events. For 846/846 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9345 event pairs, 413 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 2815. Up to 561 conditions per place. [2024-11-09 10:48:16,674 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 87 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2024-11-09 10:48:16,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 628 flow [2024-11-09 10:48:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:48:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:48:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 335 transitions. [2024-11-09 10:48:16,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.563973063973064 [2024-11-09 10:48:16,676 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 285 flow. Second operand 9 states and 335 transitions. [2024-11-09 10:48:16,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 628 flow [2024-11-09 10:48:16,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 616 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:48:16,681 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 351 flow [2024-11-09 10:48:16,681 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2024-11-09 10:48:16,682 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2024-11-09 10:48:16,682 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 351 flow [2024-11-09 10:48:16,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 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 10:48:16,682 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:16,683 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:16,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:48:16,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:16,884 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:16,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash 139680028, now seen corresponding path program 1 times [2024-11-09 10:48:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:16,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114325040] [2024-11-09 10:48:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:16,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114325040] [2024-11-09 10:48:16,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114325040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:16,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:16,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:48:16,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233569867] [2024-11-09 10:48:16,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:16,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:16,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:16,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:17,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-09 10:48:17,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 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 10:48:17,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:17,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-09 10:48:17,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:17,237 INFO L124 PetriNetUnfolderBase]: 798/1569 cut-off events. [2024-11-09 10:48:17,237 INFO L125 PetriNetUnfolderBase]: For 1635/1637 co-relation queries the response was YES. [2024-11-09 10:48:17,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1569 events. 798/1569 cut-off events. For 1635/1637 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8328 event pairs, 486 based on Foata normal form. 13/1434 useless extension candidates. Maximal degree in co-relation 2680. Up to 856 conditions per place. [2024-11-09 10:48:17,247 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 74 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-11-09 10:48:17,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 632 flow [2024-11-09 10:48:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:48:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:48:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-11-09 10:48:17,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-11-09 10:48:17,249 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 351 flow. Second operand 5 states and 219 transitions. [2024-11-09 10:48:17,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 632 flow [2024-11-09 10:48:17,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 593 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-09 10:48:17,254 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 378 flow [2024-11-09 10:48:17,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-11-09 10:48:17,255 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 18 predicate places. [2024-11-09 10:48:17,255 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 378 flow [2024-11-09 10:48:17,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 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 10:48:17,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:17,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:17,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:48:17,256 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:17,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:17,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1186504380, now seen corresponding path program 1 times [2024-11-09 10:48:17,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:17,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991690602] [2024-11-09 10:48:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:17,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:17,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:17,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991690602] [2024-11-09 10:48:17,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991690602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:17,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887145242] [2024-11-09 10:48:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:17,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:17,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:17,433 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 10:48:17,435 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 10:48:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:17,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:48:17,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:17,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:17,617 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 10:48:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:17,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887145242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:17,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:17,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-09 10:48:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632472841] [2024-11-09 10:48:17,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:17,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:48:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:48:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:48:17,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-09 10:48:17,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 378 flow. Second operand has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 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 10:48:17,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:17,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-09 10:48:17,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:18,341 INFO L124 PetriNetUnfolderBase]: 837/1552 cut-off events. [2024-11-09 10:48:18,341 INFO L125 PetriNetUnfolderBase]: For 1522/1522 co-relation queries the response was YES. [2024-11-09 10:48:18,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 1552 events. 837/1552 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7804 event pairs, 402 based on Foata normal form. 0/1457 useless extension candidates. Maximal degree in co-relation 2851. Up to 521 conditions per place. [2024-11-09 10:48:18,352 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 88 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-11-09 10:48:18,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 712 flow [2024-11-09 10:48:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:48:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:48:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2024-11-09 10:48:18,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6406926406926406 [2024-11-09 10:48:18,354 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 378 flow. Second operand 7 states and 296 transitions. [2024-11-09 10:48:18,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 712 flow [2024-11-09 10:48:18,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 700 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:18,360 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 421 flow [2024-11-09 10:48:18,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-11-09 10:48:18,361 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 23 predicate places. [2024-11-09 10:48:18,361 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 421 flow [2024-11-09 10:48:18,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 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 10:48:18,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:18,362 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:18,379 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 10:48:18,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:18,566 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:18,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1861464815, now seen corresponding path program 1 times [2024-11-09 10:48:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:18,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492891030] [2024-11-09 10:48:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:18,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492891030] [2024-11-09 10:48:18,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492891030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294265549] [2024-11-09 10:48:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:18,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:18,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:18,776 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 10:48:18,778 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 10:48:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:18,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:48:18,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:18,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:18,991 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 10:48:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:19,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294265549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:19,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:19,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-09 10:48:19,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830840785] [2024-11-09 10:48:19,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:19,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:48:19,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:19,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:48:19,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:48:19,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-09 10:48:19,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 421 flow. Second operand has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 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 10:48:19,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:19,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-09 10:48:19,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:19,777 INFO L124 PetriNetUnfolderBase]: 1180/2133 cut-off events. [2024-11-09 10:48:19,777 INFO L125 PetriNetUnfolderBase]: For 3826/3886 co-relation queries the response was YES. [2024-11-09 10:48:19,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 2133 events. 1180/2133 cut-off events. For 3826/3886 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11102 event pairs, 488 based on Foata normal form. 0/1997 useless extension candidates. Maximal degree in co-relation 3768. Up to 736 conditions per place. [2024-11-09 10:48:19,798 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 97 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-11-09 10:48:19,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 128 transitions, 883 flow [2024-11-09 10:48:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:48:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:48:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 289 transitions. [2024-11-09 10:48:19,802 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6255411255411255 [2024-11-09 10:48:19,802 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 421 flow. Second operand 7 states and 289 transitions. [2024-11-09 10:48:19,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 128 transitions, 883 flow [2024-11-09 10:48:19,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 842 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-09 10:48:19,809 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 461 flow [2024-11-09 10:48:19,809 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2024-11-09 10:48:19,810 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 25 predicate places. [2024-11-09 10:48:19,810 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 461 flow [2024-11-09 10:48:19,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 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 10:48:19,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:19,811 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:19,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:48:20,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 10:48:20,015 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:20,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1870833853, now seen corresponding path program 1 times [2024-11-09 10:48:20,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:20,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506222191] [2024-11-09 10:48:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:20,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506222191] [2024-11-09 10:48:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506222191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518227390] [2024-11-09 10:48:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:20,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:20,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:20,186 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 10:48:20,187 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 10:48:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:20,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:48:20,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:20,268 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 10:48:20,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:48:20,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:48:20,318 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:48:20,318 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 10:48:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:20,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:20,513 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 52 treesize of output 48 [2024-11-09 10:48:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:20,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518227390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:20,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:20,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:48:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670955957] [2024-11-09 10:48:20,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:20,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:48:20,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:20,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:48:20,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:48:24,728 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 10:48:28,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:48:32,788 WARN L539 Checker$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 10:48:36,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:48:40,893 WARN L539 Checker$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 10:48:41,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 66 [2024-11-09 10:48:41,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 461 flow. Second operand has 13 states, 13 states have (on average 24.46153846153846) internal successors, (318), 13 states have internal predecessors, (318), 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 10:48:41,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:41,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 66 [2024-11-09 10:48:41,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:41,850 INFO L124 PetriNetUnfolderBase]: 1148/2066 cut-off events. [2024-11-09 10:48:41,850 INFO L125 PetriNetUnfolderBase]: For 3743/3791 co-relation queries the response was YES. [2024-11-09 10:48:41,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 2066 events. 1148/2066 cut-off events. For 3743/3791 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10542 event pairs, 509 based on Foata normal form. 0/2018 useless extension candidates. Maximal degree in co-relation 3896. Up to 781 conditions per place. [2024-11-09 10:48:41,863 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 101 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2024-11-09 10:48:41,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 132 transitions, 925 flow [2024-11-09 10:48:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:48:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:48:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 298 transitions. [2024-11-09 10:48:41,865 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5016835016835017 [2024-11-09 10:48:41,865 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 461 flow. Second operand 9 states and 298 transitions. [2024-11-09 10:48:41,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 132 transitions, 925 flow [2024-11-09 10:48:41,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 132 transitions, 893 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-09 10:48:41,872 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 484 flow [2024-11-09 10:48:41,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=484, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-11-09 10:48:41,873 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 30 predicate places. [2024-11-09 10:48:41,873 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 484 flow [2024-11-09 10:48:41,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 24.46153846153846) internal successors, (318), 13 states have internal predecessors, (318), 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 10:48:41,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:41,874 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:41,892 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 10:48:42,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:48:42,075 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:42,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:42,075 INFO L85 PathProgramCache]: Analyzing trace with hash -428318647, now seen corresponding path program 1 times [2024-11-09 10:48:42,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:42,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370963235] [2024-11-09 10:48:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:42,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:42,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:42,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370963235] [2024-11-09 10:48:42,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370963235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:42,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944065437] [2024-11-09 10:48:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:42,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:42,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:42,209 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 10:48:42,215 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 10:48:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:42,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:48:42,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:42,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:42,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944065437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:42,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:42,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-09 10:48:42,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004650334] [2024-11-09 10:48:42,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:42,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 10:48:42,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:42,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 10:48:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:48:42,656 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-09 10:48:42,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 484 flow. Second operand has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 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 10:48:42,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:42,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-09 10:48:42,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:43,554 INFO L124 PetriNetUnfolderBase]: 2792/5128 cut-off events. [2024-11-09 10:48:43,554 INFO L125 PetriNetUnfolderBase]: For 11852/11963 co-relation queries the response was YES. [2024-11-09 10:48:43,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15516 conditions, 5128 events. 2792/5128 cut-off events. For 11852/11963 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 33079 event pairs, 1093 based on Foata normal form. 72/5122 useless extension candidates. Maximal degree in co-relation 8028. Up to 1002 conditions per place. [2024-11-09 10:48:43,578 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 231 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2024-11-09 10:48:43,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 295 transitions, 2281 flow [2024-11-09 10:48:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 10:48:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-09 10:48:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 931 transitions. [2024-11-09 10:48:43,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133069828722003 [2024-11-09 10:48:43,584 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 484 flow. Second operand 23 states and 931 transitions. [2024-11-09 10:48:43,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 295 transitions, 2281 flow [2024-11-09 10:48:43,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 295 transitions, 2192 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-11-09 10:48:43,604 INFO L231 Difference]: Finished difference. Result has 113 places, 107 transitions, 843 flow [2024-11-09 10:48:43,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=843, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2024-11-09 10:48:43,604 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 51 predicate places. [2024-11-09 10:48:43,604 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 843 flow [2024-11-09 10:48:43,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 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 10:48:43,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:43,605 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:43,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:48:43,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:43,806 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:43,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:43,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1294948663, now seen corresponding path program 1 times [2024-11-09 10:48:43,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:43,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916591107] [2024-11-09 10:48:43,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:43,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:43,923 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 10:48:43,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:43,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916591107] [2024-11-09 10:48:43,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916591107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:43,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:43,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:48:43,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937494101] [2024-11-09 10:48:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:43,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:48:43,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:48:43,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:48:43,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:48:43,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 843 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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 10:48:43,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:43,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:48:43,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:44,598 INFO L124 PetriNetUnfolderBase]: 3045/5859 cut-off events. [2024-11-09 10:48:44,599 INFO L125 PetriNetUnfolderBase]: For 15824/16010 co-relation queries the response was YES. [2024-11-09 10:48:44,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17784 conditions, 5859 events. 3045/5859 cut-off events. For 15824/16010 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 42099 event pairs, 1702 based on Foata normal form. 54/5759 useless extension candidates. Maximal degree in co-relation 12853. Up to 3869 conditions per place. [2024-11-09 10:48:44,634 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 106 selfloop transitions, 1 changer transitions 9/133 dead transitions. [2024-11-09 10:48:44,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 133 transitions, 1192 flow [2024-11-09 10:48:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:48:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:48:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-09 10:48:44,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6893939393939394 [2024-11-09 10:48:44,637 INFO L175 Difference]: Start difference. First operand has 113 places, 107 transitions, 843 flow. Second operand 4 states and 182 transitions. [2024-11-09 10:48:44,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 133 transitions, 1192 flow [2024-11-09 10:48:44,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 133 transitions, 1155 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-11-09 10:48:44,659 INFO L231 Difference]: Finished difference. Result has 112 places, 107 transitions, 821 flow [2024-11-09 10:48:44,659 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=821, PETRI_PLACES=112, PETRI_TRANSITIONS=107} [2024-11-09 10:48:44,660 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 50 predicate places. [2024-11-09 10:48:44,660 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 107 transitions, 821 flow [2024-11-09 10:48:44,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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 10:48:44,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:44,660 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:44,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:48:44,661 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:44,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 725935119, now seen corresponding path program 2 times [2024-11-09 10:48:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:44,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563940144] [2024-11-09 10:48:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:44,774 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 10:48:44,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:44,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563940144] [2024-11-09 10:48:44,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563940144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:44,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:44,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:48:44,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968232063] [2024-11-09 10:48:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:44,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:48:44,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:48:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:48:44,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:48:44,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 107 transitions, 821 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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 10:48:44,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:44,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:48:44,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:45,436 INFO L124 PetriNetUnfolderBase]: 3285/6382 cut-off events. [2024-11-09 10:48:45,436 INFO L125 PetriNetUnfolderBase]: For 17855/18110 co-relation queries the response was YES. [2024-11-09 10:48:45,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19389 conditions, 6382 events. 3285/6382 cut-off events. For 17855/18110 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 47223 event pairs, 2166 based on Foata normal form. 45/6173 useless extension candidates. Maximal degree in co-relation 19257. Up to 4692 conditions per place. [2024-11-09 10:48:45,471 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 117 selfloop transitions, 1 changer transitions 7/142 dead transitions. [2024-11-09 10:48:45,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 142 transitions, 1328 flow [2024-11-09 10:48:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:48:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:48:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-11-09 10:48:45,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-09 10:48:45,473 INFO L175 Difference]: Start difference. First operand has 112 places, 107 transitions, 821 flow. Second operand 4 states and 180 transitions. [2024-11-09 10:48:45,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 142 transitions, 1328 flow [2024-11-09 10:48:45,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 142 transitions, 1322 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:45,506 INFO L231 Difference]: Finished difference. Result has 114 places, 107 transitions, 843 flow [2024-11-09 10:48:45,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=843, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2024-11-09 10:48:45,507 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 52 predicate places. [2024-11-09 10:48:45,507 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 843 flow [2024-11-09 10:48:45,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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 10:48:45,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:45,507 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:45,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 10:48:45,508 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:45,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1779849144, now seen corresponding path program 1 times [2024-11-09 10:48:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:45,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000552565] [2024-11-09 10:48:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:45,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:45,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000552565] [2024-11-09 10:48:45,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000552565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89994149] [2024-11-09 10:48:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:45,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:45,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:45,590 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 10:48:45,591 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 10:48:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:45,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:48:45,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:45,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:45,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89994149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:45,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:45,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-09 10:48:45,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119636031] [2024-11-09 10:48:45,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:45,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 10:48:45,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:45,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 10:48:45,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:48:46,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-09 10:48:46,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 843 flow. Second operand has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 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 10:48:46,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:46,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-09 10:48:46,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:46,938 INFO L124 PetriNetUnfolderBase]: 3043/5753 cut-off events. [2024-11-09 10:48:46,938 INFO L125 PetriNetUnfolderBase]: For 18205/18454 co-relation queries the response was YES. [2024-11-09 10:48:46,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18248 conditions, 5753 events. 3043/5753 cut-off events. For 18205/18454 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39881 event pairs, 1735 based on Foata normal form. 72/5740 useless extension candidates. Maximal degree in co-relation 18115. Up to 1247 conditions per place. [2024-11-09 10:48:46,964 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 209 selfloop transitions, 46 changer transitions 0/271 dead transitions. [2024-11-09 10:48:46,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 271 transitions, 2279 flow [2024-11-09 10:48:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 10:48:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 10:48:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 860 transitions. [2024-11-09 10:48:46,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6204906204906205 [2024-11-09 10:48:46,967 INFO L175 Difference]: Start difference. First operand has 114 places, 107 transitions, 843 flow. Second operand 21 states and 860 transitions. [2024-11-09 10:48:46,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 271 transitions, 2279 flow [2024-11-09 10:48:46,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 271 transitions, 2267 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:46,995 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 1138 flow [2024-11-09 10:48:46,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1138, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2024-11-09 10:48:46,996 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 72 predicate places. [2024-11-09 10:48:46,996 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 1138 flow [2024-11-09 10:48:46,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 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 10:48:46,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:46,997 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:47,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:48:47,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:47,198 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:47,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1069275252, now seen corresponding path program 1 times [2024-11-09 10:48:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:47,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823747710] [2024-11-09 10:48:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:47,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:47,240 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 10:48:47,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:47,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823747710] [2024-11-09 10:48:47,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823747710] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:47,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:47,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:48:47,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976718718] [2024-11-09 10:48:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:47,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:48:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:47,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:48:47,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:48:47,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:48:47,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 1138 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:47,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:47,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:48:47,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:47,638 INFO L124 PetriNetUnfolderBase]: 2161/4301 cut-off events. [2024-11-09 10:48:47,638 INFO L125 PetriNetUnfolderBase]: For 17968/18148 co-relation queries the response was YES. [2024-11-09 10:48:47,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14644 conditions, 4301 events. 2161/4301 cut-off events. For 17968/18148 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 29335 event pairs, 818 based on Foata normal form. 209/4448 useless extension candidates. Maximal degree in co-relation 10716. Up to 3107 conditions per place. [2024-11-09 10:48:47,709 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 111 selfloop transitions, 18 changer transitions 5/151 dead transitions. [2024-11-09 10:48:47,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 151 transitions, 1664 flow [2024-11-09 10:48:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:48:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:48:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-11-09 10:48:47,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7070707070707071 [2024-11-09 10:48:47,711 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 1138 flow. Second operand 3 states and 140 transitions. [2024-11-09 10:48:47,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 151 transitions, 1664 flow [2024-11-09 10:48:47,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 151 transitions, 1623 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-09 10:48:47,734 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 1415 flow [2024-11-09 10:48:47,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1415, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-11-09 10:48:47,734 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 69 predicate places. [2024-11-09 10:48:47,735 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 1415 flow [2024-11-09 10:48:47,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:47,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:47,735 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:47,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-09 10:48:47,735 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:47,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash -701278822, now seen corresponding path program 2 times [2024-11-09 10:48:47,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:47,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915174655] [2024-11-09 10:48:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:47,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:48:47,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:47,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915174655] [2024-11-09 10:48:47,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915174655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:47,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381276001] [2024-11-09 10:48:47,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:48:47,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:47,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:47,924 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 10:48:47,925 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 10:48:48,002 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:48:48,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:48:48,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:48:48,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:48,015 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 10:48:48,081 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:48:48,082 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 10:48:48,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:48:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:48:48,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:48,328 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 52 treesize of output 48 [2024-11-09 10:48:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:48:48,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381276001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:48,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:48,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-09 10:48:48,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730540911] [2024-11-09 10:48:48,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:48,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:48:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:48:48,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:48:49,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-09 10:48:49,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 1415 flow. Second operand has 21 states, 21 states have (on average 28.142857142857142) internal successors, (591), 21 states have internal predecessors, (591), 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 10:48:49,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:49,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-09 10:48:49,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:50,676 INFO L124 PetriNetUnfolderBase]: 2719/5083 cut-off events. [2024-11-09 10:48:50,676 INFO L125 PetriNetUnfolderBase]: For 23508/23679 co-relation queries the response was YES. [2024-11-09 10:48:50,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17925 conditions, 5083 events. 2719/5083 cut-off events. For 23508/23679 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 32837 event pairs, 1162 based on Foata normal form. 24/5067 useless extension candidates. Maximal degree in co-relation 13672. Up to 1675 conditions per place. [2024-11-09 10:48:50,705 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 188 selfloop transitions, 42 changer transitions 0/243 dead transitions. [2024-11-09 10:48:50,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 2514 flow [2024-11-09 10:48:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:48:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:48:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 478 transitions. [2024-11-09 10:48:50,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5571095571095571 [2024-11-09 10:48:50,707 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 1415 flow. Second operand 13 states and 478 transitions. [2024-11-09 10:48:50,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 2514 flow [2024-11-09 10:48:50,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 243 transitions, 2426 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:50,742 INFO L231 Difference]: Finished difference. Result has 143 places, 149 transitions, 1564 flow [2024-11-09 10:48:50,742 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1564, PETRI_PLACES=143, PETRI_TRANSITIONS=149} [2024-11-09 10:48:50,743 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 81 predicate places. [2024-11-09 10:48:50,743 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 149 transitions, 1564 flow [2024-11-09 10:48:50,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 28.142857142857142) internal successors, (591), 21 states have internal predecessors, (591), 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 10:48:50,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:50,744 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:50,762 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 10:48:50,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:50,945 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:50,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2029823056, now seen corresponding path program 1 times [2024-11-09 10:48:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:50,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139818315] [2024-11-09 10:48:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:50,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:51,285 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 10:48:51,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:51,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139818315] [2024-11-09 10:48:51,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139818315] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:51,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:51,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 10:48:51,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877711095] [2024-11-09 10:48:51,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:51,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:48:51,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:51,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:48:51,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:48:51,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:48:51,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 149 transitions, 1564 flow. Second operand has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 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 10:48:51,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:51,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:48:51,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:51,922 INFO L124 PetriNetUnfolderBase]: 2421/4551 cut-off events. [2024-11-09 10:48:51,923 INFO L125 PetriNetUnfolderBase]: For 27025/27241 co-relation queries the response was YES. [2024-11-09 10:48:51,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17327 conditions, 4551 events. 2421/4551 cut-off events. For 27025/27241 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 29943 event pairs, 829 based on Foata normal form. 1/4472 useless extension candidates. Maximal degree in co-relation 13803. Up to 2233 conditions per place. [2024-11-09 10:48:51,950 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 155 selfloop transitions, 31 changer transitions 27/232 dead transitions. [2024-11-09 10:48:51,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 232 transitions, 2761 flow [2024-11-09 10:48:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:48:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:48:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 302 transitions. [2024-11-09 10:48:51,952 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6536796536796536 [2024-11-09 10:48:51,952 INFO L175 Difference]: Start difference. First operand has 143 places, 149 transitions, 1564 flow. Second operand 7 states and 302 transitions. [2024-11-09 10:48:51,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 232 transitions, 2761 flow [2024-11-09 10:48:51,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 232 transitions, 2712 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-09 10:48:51,987 INFO L231 Difference]: Finished difference. Result has 145 places, 169 transitions, 1897 flow [2024-11-09 10:48:51,988 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1897, PETRI_PLACES=145, PETRI_TRANSITIONS=169} [2024-11-09 10:48:51,988 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 83 predicate places. [2024-11-09 10:48:51,988 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 169 transitions, 1897 flow [2024-11-09 10:48:51,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 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 10:48:51,988 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:51,989 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:51,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-09 10:48:51,989 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:51,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:51,989 INFO L85 PathProgramCache]: Analyzing trace with hash -264806459, now seen corresponding path program 1 times [2024-11-09 10:48:51,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:51,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680340234] [2024-11-09 10:48:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:51,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:48:52,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680340234] [2024-11-09 10:48:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680340234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430466238] [2024-11-09 10:48:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:52,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:52,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:52,178 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 10:48:52,179 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 10:48:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:52,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:48:52,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:48:52,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:52,469 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 10:48:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:48:52,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430466238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:52,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:52,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-09 10:48:52,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661481052] [2024-11-09 10:48:52,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:52,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:48:52,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:52,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:48:52,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:48:53,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-09 10:48:53,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 169 transitions, 1897 flow. Second operand has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 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 10:48:53,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:53,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-09 10:48:53,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:53,798 INFO L124 PetriNetUnfolderBase]: 2606/4894 cut-off events. [2024-11-09 10:48:53,798 INFO L125 PetriNetUnfolderBase]: For 30103/30226 co-relation queries the response was YES. [2024-11-09 10:48:53,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20068 conditions, 4894 events. 2606/4894 cut-off events. For 30103/30226 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 31982 event pairs, 1099 based on Foata normal form. 26/4859 useless extension candidates. Maximal degree in co-relation 20005. Up to 1546 conditions per place. [2024-11-09 10:48:53,829 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 221 selfloop transitions, 47 changer transitions 0/284 dead transitions. [2024-11-09 10:48:53,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 284 transitions, 3285 flow [2024-11-09 10:48:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:48:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:48:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 417 transitions. [2024-11-09 10:48:53,833 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-11-09 10:48:53,833 INFO L175 Difference]: Start difference. First operand has 145 places, 169 transitions, 1897 flow. Second operand 10 states and 417 transitions. [2024-11-09 10:48:53,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 284 transitions, 3285 flow [2024-11-09 10:48:53,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 284 transitions, 3187 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-11-09 10:48:53,874 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 2009 flow [2024-11-09 10:48:53,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2009, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-11-09 10:48:53,875 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 89 predicate places. [2024-11-09 10:48:53,876 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 2009 flow [2024-11-09 10:48:53,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 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 10:48:53,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:53,876 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:53,893 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 10:48:54,077 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,SelfDestructingSolverStorable22 [2024-11-09 10:48:54,077 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:54,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1458126025, now seen corresponding path program 2 times [2024-11-09 10:48:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:54,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069178116] [2024-11-09 10:48:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:54,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:48:54,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:54,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069178116] [2024-11-09 10:48:54,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069178116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:54,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170221272] [2024-11-09 10:48:54,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:48:54,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:54,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:54,284 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 10:48:54,284 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 10:48:54,358 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:48:54,358 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:48:54,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:48:54,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:48:54,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:54,710 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 35 treesize of output 31 [2024-11-09 10:48:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:48:54,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170221272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:54,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:54,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-09 10:48:54,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462612183] [2024-11-09 10:48:54,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:54,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:48:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:48:54,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:48:55,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-09 10:48:55,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 2009 flow. Second operand has 20 states, 20 states have (on average 29.45) internal successors, (589), 20 states have internal predecessors, (589), 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 10:48:55,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:55,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-09 10:48:55,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:57,305 INFO L124 PetriNetUnfolderBase]: 3146/5425 cut-off events. [2024-11-09 10:48:57,305 INFO L125 PetriNetUnfolderBase]: For 46861/47205 co-relation queries the response was YES. [2024-11-09 10:48:57,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23238 conditions, 5425 events. 3146/5425 cut-off events. For 46861/47205 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 33662 event pairs, 712 based on Foata normal form. 33/5410 useless extension candidates. Maximal degree in co-relation 19766. Up to 1103 conditions per place. [2024-11-09 10:48:57,340 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 266 selfloop transitions, 75 changer transitions 0/357 dead transitions. [2024-11-09 10:48:57,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 357 transitions, 4527 flow [2024-11-09 10:48:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 10:48:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 10:48:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 737 transitions. [2024-11-09 10:48:57,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-11-09 10:48:57,343 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 2009 flow. Second operand 21 states and 737 transitions. [2024-11-09 10:48:57,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 357 transitions, 4527 flow [2024-11-09 10:48:57,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 357 transitions, 4445 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-09 10:48:57,381 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 2196 flow [2024-11-09 10:48:57,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2196, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2024-11-09 10:48:57,382 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 105 predicate places. [2024-11-09 10:48:57,382 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 2196 flow [2024-11-09 10:48:57,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.45) internal successors, (589), 20 states have internal predecessors, (589), 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 10:48:57,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:57,383 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:57,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 10:48:57,583 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,SelfDestructingSolverStorable23 [2024-11-09 10:48:57,583 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:48:57,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2052384155, now seen corresponding path program 1 times [2024-11-09 10:48:57,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:57,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925249702] [2024-11-09 10:48:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:57,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:57,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:57,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925249702] [2024-11-09 10:48:57,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925249702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:57,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637347673] [2024-11-09 10:48:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:57,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:57,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:57,806 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 10:48:57,808 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 10:48:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:57,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:48:57,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:58,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:58,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637347673] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:58,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:48:58,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-09 10:48:58,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100338718] [2024-11-09 10:48:58,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:58,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:48:58,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:48:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-09 10:48:58,714 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:48:58,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 2196 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:48:58,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:58,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:48:58,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:59,698 INFO L124 PetriNetUnfolderBase]: 2652/4942 cut-off events. [2024-11-09 10:48:59,699 INFO L125 PetriNetUnfolderBase]: For 41713/41951 co-relation queries the response was YES. [2024-11-09 10:48:59,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21344 conditions, 4942 events. 2652/4942 cut-off events. For 41713/41951 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 33253 event pairs, 804 based on Foata normal form. 22/4884 useless extension candidates. Maximal degree in co-relation 18408. Up to 2146 conditions per place. [2024-11-09 10:48:59,753 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 197 selfloop transitions, 63 changer transitions 12/294 dead transitions. [2024-11-09 10:48:59,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 3723 flow [2024-11-09 10:48:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:48:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:48:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 572 transitions. [2024-11-09 10:48:59,756 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-09 10:48:59,756 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 2196 flow. Second operand 14 states and 572 transitions. [2024-11-09 10:48:59,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 3723 flow [2024-11-09 10:48:59,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 294 transitions, 3551 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-11-09 10:48:59,810 INFO L231 Difference]: Finished difference. Result has 174 places, 190 transitions, 2345 flow [2024-11-09 10:48:59,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2345, PETRI_PLACES=174, PETRI_TRANSITIONS=190} [2024-11-09 10:48:59,811 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 112 predicate places. [2024-11-09 10:48:59,811 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 190 transitions, 2345 flow [2024-11-09 10:48:59,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:48:59,811 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:59,811 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:59,824 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 10:49:00,012 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,SelfDestructingSolverStorable24 [2024-11-09 10:49:00,012 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:00,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2042732917, now seen corresponding path program 1 times [2024-11-09 10:49:00,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407910443] [2024-11-09 10:49:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:00,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407910443] [2024-11-09 10:49:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407910443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:00,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508527796] [2024-11-09 10:49:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:00,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:00,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:00,263 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 10:49:00,275 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 10:49:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:00,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:49:00,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:00,375 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 10:49:00,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:49:00,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:49:00,458 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:49:00,459 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 10:49:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:00,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:00,699 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 52 treesize of output 48 [2024-11-09 10:49:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:00,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508527796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:49:00,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:49:00,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-09 10:49:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104969519] [2024-11-09 10:49:00,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:49:00,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:49:00,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:49:00,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:49:01,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-09 10:49:01,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 190 transitions, 2345 flow. Second operand has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 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 10:49:01,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:01,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-09 10:49:01,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:02,847 INFO L124 PetriNetUnfolderBase]: 3102/5724 cut-off events. [2024-11-09 10:49:02,847 INFO L125 PetriNetUnfolderBase]: For 49885/50215 co-relation queries the response was YES. [2024-11-09 10:49:02,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25215 conditions, 5724 events. 3102/5724 cut-off events. For 49885/50215 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 37667 event pairs, 1241 based on Foata normal form. 33/5714 useless extension candidates. Maximal degree in co-relation 25126. Up to 1832 conditions per place. [2024-11-09 10:49:02,886 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 251 selfloop transitions, 48 changer transitions 0/318 dead transitions. [2024-11-09 10:49:02,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 318 transitions, 4328 flow [2024-11-09 10:49:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:49:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:49:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 483 transitions. [2024-11-09 10:49:02,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5629370629370629 [2024-11-09 10:49:02,888 INFO L175 Difference]: Start difference. First operand has 174 places, 190 transitions, 2345 flow. Second operand 13 states and 483 transitions. [2024-11-09 10:49:02,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 318 transitions, 4328 flow [2024-11-09 10:49:02,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 318 transitions, 4196 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-09 10:49:02,932 INFO L231 Difference]: Finished difference. Result has 184 places, 195 transitions, 2466 flow [2024-11-09 10:49:02,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2466, PETRI_PLACES=184, PETRI_TRANSITIONS=195} [2024-11-09 10:49:02,933 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 122 predicate places. [2024-11-09 10:49:02,933 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 195 transitions, 2466 flow [2024-11-09 10:49:02,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 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 10:49:02,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:02,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:02,945 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 10:49:03,134 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,SelfDestructingSolverStorable25 [2024-11-09 10:49:03,134 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:03,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash 243948797, now seen corresponding path program 2 times [2024-11-09 10:49:03,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:03,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197757940] [2024-11-09 10:49:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:03,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:03,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:03,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197757940] [2024-11-09 10:49:03,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197757940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:03,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546610231] [2024-11-09 10:49:03,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:49:03,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:03,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:03,339 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:03,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:49:03,416 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:49:03,416 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:03,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:49:03,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:03,605 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:03,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546610231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:03,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:03,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-09 10:49:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570035762] [2024-11-09 10:49:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:03,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:49:03,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:49:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:49:03,627 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:03,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 195 transitions, 2466 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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 10:49:03,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:03,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:04,199 INFO L124 PetriNetUnfolderBase]: 2777/5196 cut-off events. [2024-11-09 10:49:04,199 INFO L125 PetriNetUnfolderBase]: For 45163/45463 co-relation queries the response was YES. [2024-11-09 10:49:04,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23209 conditions, 5196 events. 2777/5196 cut-off events. For 45163/45463 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 34493 event pairs, 879 based on Foata normal form. 26/5136 useless extension candidates. Maximal degree in co-relation 22280. Up to 2671 conditions per place. [2024-11-09 10:49:04,235 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 192 selfloop transitions, 39 changer transitions 14/269 dead transitions. [2024-11-09 10:49:04,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 269 transitions, 3716 flow [2024-11-09 10:49:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:49:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:49:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 377 transitions. [2024-11-09 10:49:04,237 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6346801346801347 [2024-11-09 10:49:04,237 INFO L175 Difference]: Start difference. First operand has 184 places, 195 transitions, 2466 flow. Second operand 9 states and 377 transitions. [2024-11-09 10:49:04,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 269 transitions, 3716 flow [2024-11-09 10:49:04,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 269 transitions, 3683 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-09 10:49:04,273 INFO L231 Difference]: Finished difference. Result has 190 places, 197 transitions, 2570 flow [2024-11-09 10:49:04,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2570, PETRI_PLACES=190, PETRI_TRANSITIONS=197} [2024-11-09 10:49:04,274 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 128 predicate places. [2024-11-09 10:49:04,274 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 197 transitions, 2570 flow [2024-11-09 10:49:04,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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 10:49:04,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:04,275 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:04,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:04,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:04,476 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:04,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:04,476 INFO L85 PathProgramCache]: Analyzing trace with hash -755207473, now seen corresponding path program 3 times [2024-11-09 10:49:04,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:04,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539068899] [2024-11-09 10:49:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:04,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539068899] [2024-11-09 10:49:04,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539068899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943471734] [2024-11-09 10:49:04,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:49:04,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:04,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:04,679 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:04,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:49:04,762 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 10:49:04,762 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:04,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:49:04,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:05,016 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943471734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:05,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:05,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-09 10:49:05,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322243033] [2024-11-09 10:49:05,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:05,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:49:05,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:49:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:49:05,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:05,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 197 transitions, 2570 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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 10:49:05,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:05,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:05,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:05,621 INFO L124 PetriNetUnfolderBase]: 2725/5088 cut-off events. [2024-11-09 10:49:05,621 INFO L125 PetriNetUnfolderBase]: For 47932/48232 co-relation queries the response was YES. [2024-11-09 10:49:05,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24164 conditions, 5088 events. 2725/5088 cut-off events. For 47932/48232 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 33496 event pairs, 865 based on Foata normal form. 26/5028 useless extension candidates. Maximal degree in co-relation 23950. Up to 2577 conditions per place. [2024-11-09 10:49:05,658 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 181 selfloop transitions, 36 changer transitions 25/266 dead transitions. [2024-11-09 10:49:05,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3744 flow [2024-11-09 10:49:05,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:49:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:49:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 378 transitions. [2024-11-09 10:49:05,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-09 10:49:05,660 INFO L175 Difference]: Start difference. First operand has 190 places, 197 transitions, 2570 flow. Second operand 9 states and 378 transitions. [2024-11-09 10:49:05,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3744 flow [2024-11-09 10:49:05,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 266 transitions, 3648 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-09 10:49:05,703 INFO L231 Difference]: Finished difference. Result has 192 places, 192 transitions, 2494 flow [2024-11-09 10:49:05,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2494, PETRI_PLACES=192, PETRI_TRANSITIONS=192} [2024-11-09 10:49:05,704 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 130 predicate places. [2024-11-09 10:49:05,704 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 192 transitions, 2494 flow [2024-11-09 10:49:05,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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 10:49:05,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:05,704 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:05,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 10:49:05,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 10:49:05,909 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:05,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1255482953, now seen corresponding path program 4 times [2024-11-09 10:49:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:05,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809188729] [2024-11-09 10:49:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:05,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:06,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:06,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809188729] [2024-11-09 10:49:06,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809188729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:06,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020380308] [2024-11-09 10:49:06,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:49:06,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:06,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:06,101 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:06,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:49:06,187 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:49:06,187 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:06,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:49:06,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:06,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020380308] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:06,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:06,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 10] total 27 [2024-11-09 10:49:06,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258667306] [2024-11-09 10:49:06,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:06,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:49:06,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:49:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-09 10:49:06,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-09 10:49:06,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 192 transitions, 2494 flow. Second operand has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 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 10:49:06,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:06,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-09 10:49:06,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:08,056 INFO L124 PetriNetUnfolderBase]: 3698/7008 cut-off events. [2024-11-09 10:49:08,057 INFO L125 PetriNetUnfolderBase]: For 60573/60910 co-relation queries the response was YES. [2024-11-09 10:49:08,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31684 conditions, 7008 events. 3698/7008 cut-off events. For 60573/60910 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 49792 event pairs, 390 based on Foata normal form. 6/6906 useless extension candidates. Maximal degree in co-relation 31151. Up to 1346 conditions per place. [2024-11-09 10:49:08,097 INFO L140 encePairwiseOnDemand]: 51/66 looper letters, 292 selfloop transitions, 118 changer transitions 26/459 dead transitions. [2024-11-09 10:49:08,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 459 transitions, 6438 flow [2024-11-09 10:49:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 10:49:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-09 10:49:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 632 transitions. [2024-11-09 10:49:08,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6383838383838384 [2024-11-09 10:49:08,101 INFO L175 Difference]: Start difference. First operand has 192 places, 192 transitions, 2494 flow. Second operand 15 states and 632 transitions. [2024-11-09 10:49:08,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 459 transitions, 6438 flow [2024-11-09 10:49:08,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 459 transitions, 6230 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-09 10:49:08,161 INFO L231 Difference]: Finished difference. Result has 204 places, 241 transitions, 3532 flow [2024-11-09 10:49:08,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3532, PETRI_PLACES=204, PETRI_TRANSITIONS=241} [2024-11-09 10:49:08,162 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 142 predicate places. [2024-11-09 10:49:08,162 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 3532 flow [2024-11-09 10:49:08,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 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 10:49:08,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:08,163 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:08,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 10:49:08,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 10:49:08,364 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:08,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1842144305, now seen corresponding path program 5 times [2024-11-09 10:49:08,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:08,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891394709] [2024-11-09 10:49:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:08,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:08,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891394709] [2024-11-09 10:49:08,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891394709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:08,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189555887] [2024-11-09 10:49:08,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:49:08,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:08,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:08,550 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:08,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:49:08,632 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:49:08,632 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:08,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:49:08,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:08,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:09,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189555887] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:09,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:09,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-09 10:49:09,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045080712] [2024-11-09 10:49:09,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:09,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:49:09,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:49:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-09 10:49:09,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:09,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 241 transitions, 3532 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:49:09,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:09,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:09,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:10,593 INFO L124 PetriNetUnfolderBase]: 3329/6403 cut-off events. [2024-11-09 10:49:10,594 INFO L125 PetriNetUnfolderBase]: For 68815/69307 co-relation queries the response was YES. [2024-11-09 10:49:10,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30981 conditions, 6403 events. 3329/6403 cut-off events. For 68815/69307 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 45909 event pairs, 984 based on Foata normal form. 78/6347 useless extension candidates. Maximal degree in co-relation 30863. Up to 3715 conditions per place. [2024-11-09 10:49:10,639 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 157 selfloop transitions, 83 changer transitions 30/296 dead transitions. [2024-11-09 10:49:10,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 296 transitions, 4497 flow [2024-11-09 10:49:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:49:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:49:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 508 transitions. [2024-11-09 10:49:10,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5920745920745921 [2024-11-09 10:49:10,641 INFO L175 Difference]: Start difference. First operand has 204 places, 241 transitions, 3532 flow. Second operand 13 states and 508 transitions. [2024-11-09 10:49:10,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 296 transitions, 4497 flow [2024-11-09 10:49:10,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 296 transitions, 4337 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-11-09 10:49:10,716 INFO L231 Difference]: Finished difference. Result has 206 places, 228 transitions, 3336 flow [2024-11-09 10:49:10,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3336, PETRI_PLACES=206, PETRI_TRANSITIONS=228} [2024-11-09 10:49:10,717 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 144 predicate places. [2024-11-09 10:49:10,717 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 228 transitions, 3336 flow [2024-11-09 10:49:10,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:49:10,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:10,717 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:10,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:10,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:10,918 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:10,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1936349030, now seen corresponding path program 1 times [2024-11-09 10:49:10,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:10,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22355104] [2024-11-09 10:49:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:10,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:11,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22355104] [2024-11-09 10:49:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22355104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091777798] [2024-11-09 10:49:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:11,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:11,112 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:11,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 10:49:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:11,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:49:11,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:11,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:12,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091777798] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:12,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:12,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-09 10:49:12,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433071484] [2024-11-09 10:49:12,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:12,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:49:12,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:49:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-09 10:49:12,053 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:12,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 228 transitions, 3336 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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 10:49:12,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:12,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:12,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:13,287 INFO L124 PetriNetUnfolderBase]: 3409/6575 cut-off events. [2024-11-09 10:49:13,287 INFO L125 PetriNetUnfolderBase]: For 66558/67060 co-relation queries the response was YES. [2024-11-09 10:49:13,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31066 conditions, 6575 events. 3409/6575 cut-off events. For 66558/67060 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 47727 event pairs, 956 based on Foata normal form. 58/6492 useless extension candidates. Maximal degree in co-relation 30936. Up to 3590 conditions per place. [2024-11-09 10:49:13,335 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 196 selfloop transitions, 93 changer transitions 12/327 dead transitions. [2024-11-09 10:49:13,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 327 transitions, 4757 flow [2024-11-09 10:49:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:49:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:49:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 536 transitions. [2024-11-09 10:49:13,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6247086247086248 [2024-11-09 10:49:13,337 INFO L175 Difference]: Start difference. First operand has 206 places, 228 transitions, 3336 flow. Second operand 13 states and 536 transitions. [2024-11-09 10:49:13,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 327 transitions, 4757 flow [2024-11-09 10:49:13,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 327 transitions, 4538 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-11-09 10:49:13,427 INFO L231 Difference]: Finished difference. Result has 207 places, 237 transitions, 3467 flow [2024-11-09 10:49:13,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3467, PETRI_PLACES=207, PETRI_TRANSITIONS=237} [2024-11-09 10:49:13,427 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 145 predicate places. [2024-11-09 10:49:13,427 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 237 transitions, 3467 flow [2024-11-09 10:49:13,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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 10:49:13,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:13,428 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:13,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 10:49:13,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:13,628 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:13,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1662315244, now seen corresponding path program 2 times [2024-11-09 10:49:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:13,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174380348] [2024-11-09 10:49:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:13,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:13,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:13,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174380348] [2024-11-09 10:49:13,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174380348] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:13,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639004745] [2024-11-09 10:49:13,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:49:13,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:13,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:13,841 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:13,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 10:49:13,919 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:49:13,919 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:13,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:49:13,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:14,145 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:14,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639004745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:14,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:14,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-09 10:49:14,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803488656] [2024-11-09 10:49:14,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:14,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:49:14,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:49:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:49:14,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:14,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 237 transitions, 3467 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:49:14,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:14,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:14,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:14,921 INFO L124 PetriNetUnfolderBase]: 3367/6507 cut-off events. [2024-11-09 10:49:14,922 INFO L125 PetriNetUnfolderBase]: For 65689/66181 co-relation queries the response was YES. [2024-11-09 10:49:14,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30910 conditions, 6507 events. 3367/6507 cut-off events. For 65689/66181 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 47373 event pairs, 998 based on Foata normal form. 58/6419 useless extension candidates. Maximal degree in co-relation 30777. Up to 3933 conditions per place. [2024-11-09 10:49:14,978 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 184 selfloop transitions, 72 changer transitions 15/297 dead transitions. [2024-11-09 10:49:14,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 297 transitions, 4578 flow [2024-11-09 10:49:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:49:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:49:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 373 transitions. [2024-11-09 10:49:14,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6279461279461279 [2024-11-09 10:49:14,980 INFO L175 Difference]: Start difference. First operand has 207 places, 237 transitions, 3467 flow. Second operand 9 states and 373 transitions. [2024-11-09 10:49:14,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 297 transitions, 4578 flow [2024-11-09 10:49:15,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 297 transitions, 4471 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-11-09 10:49:15,078 INFO L231 Difference]: Finished difference. Result has 211 places, 239 transitions, 3552 flow [2024-11-09 10:49:15,079 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3552, PETRI_PLACES=211, PETRI_TRANSITIONS=239} [2024-11-09 10:49:15,079 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 149 predicate places. [2024-11-09 10:49:15,079 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 239 transitions, 3552 flow [2024-11-09 10:49:15,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:49:15,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:15,080 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:15,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:15,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:15,280 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:15,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:15,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1395325048, now seen corresponding path program 3 times [2024-11-09 10:49:15,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:15,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48310790] [2024-11-09 10:49:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:15,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:15,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48310790] [2024-11-09 10:49:15,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48310790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41725184] [2024-11-09 10:49:15,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:49:15,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:15,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:15,493 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:15,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 10:49:15,573 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 10:49:15,574 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:15,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:49:15,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:15,805 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:15,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41725184] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:15,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:15,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-09 10:49:15,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298797859] [2024-11-09 10:49:15,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:15,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:49:15,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:15,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:49:15,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:49:15,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:15,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 239 transitions, 3552 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:49:15,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:15,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:15,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:16,604 INFO L124 PetriNetUnfolderBase]: 3315/6399 cut-off events. [2024-11-09 10:49:16,604 INFO L125 PetriNetUnfolderBase]: For 68592/69084 co-relation queries the response was YES. [2024-11-09 10:49:16,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31023 conditions, 6399 events. 3315/6399 cut-off events. For 68592/69084 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 46483 event pairs, 985 based on Foata normal form. 58/6311 useless extension candidates. Maximal degree in co-relation 30898. Up to 3839 conditions per place. [2024-11-09 10:49:16,651 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 173 selfloop transitions, 69 changer transitions 26/294 dead transitions. [2024-11-09 10:49:16,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 294 transitions, 4570 flow [2024-11-09 10:49:16,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:49:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:49:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 374 transitions. [2024-11-09 10:49:16,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-11-09 10:49:16,653 INFO L175 Difference]: Start difference. First operand has 211 places, 239 transitions, 3552 flow. Second operand 9 states and 374 transitions. [2024-11-09 10:49:16,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 294 transitions, 4570 flow [2024-11-09 10:49:16,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 294 transitions, 4430 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-09 10:49:16,756 INFO L231 Difference]: Finished difference. Result has 213 places, 234 transitions, 3469 flow [2024-11-09 10:49:16,757 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3469, PETRI_PLACES=213, PETRI_TRANSITIONS=234} [2024-11-09 10:49:16,757 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 151 predicate places. [2024-11-09 10:49:16,757 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 234 transitions, 3469 flow [2024-11-09 10:49:16,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:49:16,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:16,757 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:16,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 10:49:16,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-09 10:49:16,958 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:16,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:16,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1895600528, now seen corresponding path program 4 times [2024-11-09 10:49:16,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:16,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572392304] [2024-11-09 10:49:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:16,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:17,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:17,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572392304] [2024-11-09 10:49:17,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572392304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:17,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126845389] [2024-11-09 10:49:17,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:49:17,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:17,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:17,156 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:17,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 10:49:17,241 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:49:17,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:17,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:49:17,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:17,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126845389] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:17,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:17,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-09 10:49:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525526969] [2024-11-09 10:49:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:17,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:49:17,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:17,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:49:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-09 10:49:17,820 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:17,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 234 transitions, 3469 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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 10:49:17,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:17,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:17,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:18,730 INFO L124 PetriNetUnfolderBase]: 3227/6221 cut-off events. [2024-11-09 10:49:18,731 INFO L125 PetriNetUnfolderBase]: For 67130/67632 co-relation queries the response was YES. [2024-11-09 10:49:18,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30193 conditions, 6221 events. 3227/6221 cut-off events. For 67130/67632 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 44782 event pairs, 944 based on Foata normal form. 58/6138 useless extension candidates. Maximal degree in co-relation 30077. Up to 3590 conditions per place. [2024-11-09 10:49:18,772 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 156 selfloop transitions, 87 changer transitions 21/290 dead transitions. [2024-11-09 10:49:18,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 290 transitions, 4354 flow [2024-11-09 10:49:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:49:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:49:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 480 transitions. [2024-11-09 10:49:18,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-09 10:49:18,774 INFO L175 Difference]: Start difference. First operand has 213 places, 234 transitions, 3469 flow. Second operand 12 states and 480 transitions. [2024-11-09 10:49:18,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 290 transitions, 4354 flow [2024-11-09 10:49:18,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 290 transitions, 4207 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-09 10:49:18,863 INFO L231 Difference]: Finished difference. Result has 213 places, 228 transitions, 3418 flow [2024-11-09 10:49:18,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3418, PETRI_PLACES=213, PETRI_TRANSITIONS=228} [2024-11-09 10:49:18,863 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 151 predicate places. [2024-11-09 10:49:18,864 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 228 transitions, 3418 flow [2024-11-09 10:49:18,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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 10:49:18,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:18,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:18,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 10:49:19,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 10:49:19,065 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:19,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1755724260, now seen corresponding path program 5 times [2024-11-09 10:49:19,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:19,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964900788] [2024-11-09 10:49:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:19,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:19,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:19,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964900788] [2024-11-09 10:49:19,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964900788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:19,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209457852] [2024-11-09 10:49:19,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:49:19,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:19,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:19,266 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:19,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 10:49:19,336 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:49:19,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:19,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:49:19,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:19,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209457852] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:20,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-09 10:49:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100172838] [2024-11-09 10:49:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:20,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:49:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:49:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-09 10:49:20,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:20,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 228 transitions, 3418 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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 10:49:20,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:20,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:20,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:21,083 INFO L124 PetriNetUnfolderBase]: 3199/6109 cut-off events. [2024-11-09 10:49:21,083 INFO L125 PetriNetUnfolderBase]: For 66841/67361 co-relation queries the response was YES. [2024-11-09 10:49:21,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29805 conditions, 6109 events. 3199/6109 cut-off events. For 66841/67361 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 44060 event pairs, 930 based on Foata normal form. 70/6042 useless extension candidates. Maximal degree in co-relation 29690. Up to 3608 conditions per place. [2024-11-09 10:49:21,116 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 145 selfloop transitions, 83 changer transitions 26/280 dead transitions. [2024-11-09 10:49:21,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 280 transitions, 4305 flow [2024-11-09 10:49:21,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:49:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:49:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 472 transitions. [2024-11-09 10:49:21,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-11-09 10:49:21,118 INFO L175 Difference]: Start difference. First operand has 213 places, 228 transitions, 3418 flow. Second operand 12 states and 472 transitions. [2024-11-09 10:49:21,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 280 transitions, 4305 flow [2024-11-09 10:49:21,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 280 transitions, 4227 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-11-09 10:49:21,193 INFO L231 Difference]: Finished difference. Result has 212 places, 221 transitions, 3423 flow [2024-11-09 10:49:21,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3423, PETRI_PLACES=212, PETRI_TRANSITIONS=221} [2024-11-09 10:49:21,194 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 150 predicate places. [2024-11-09 10:49:21,194 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 221 transitions, 3423 flow [2024-11-09 10:49:21,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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 10:49:21,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:21,194 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:21,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:21,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:21,395 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:21,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:21,395 INFO L85 PathProgramCache]: Analyzing trace with hash -330388147, now seen corresponding path program 6 times [2024-11-09 10:49:21,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:21,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572424381] [2024-11-09 10:49:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:21,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:21,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:21,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572424381] [2024-11-09 10:49:21,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572424381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:21,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872157413] [2024-11-09 10:49:21,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:49:21,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:21,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:21,561 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:21,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 10:49:21,631 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-09 10:49:21,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:21,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:49:21,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:21,802 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872157413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:21,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:21,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-09 10:49:21,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098321641] [2024-11-09 10:49:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:21,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:49:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:49:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:49:21,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:21,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 221 transitions, 3423 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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 10:49:21,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:21,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:21,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:22,508 INFO L124 PetriNetUnfolderBase]: 3093/5953 cut-off events. [2024-11-09 10:49:22,509 INFO L125 PetriNetUnfolderBase]: For 68709/69211 co-relation queries the response was YES. [2024-11-09 10:49:22,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29364 conditions, 5953 events. 3093/5953 cut-off events. For 68709/69211 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 42827 event pairs, 935 based on Foata normal form. 70/5886 useless extension candidates. Maximal degree in co-relation 29259. Up to 3591 conditions per place. [2024-11-09 10:49:22,551 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 140 selfloop transitions, 54 changer transitions 34/254 dead transitions. [2024-11-09 10:49:22,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 254 transitions, 4098 flow [2024-11-09 10:49:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:49:22,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:49:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 365 transitions. [2024-11-09 10:49:22,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144781144781145 [2024-11-09 10:49:22,552 INFO L175 Difference]: Start difference. First operand has 212 places, 221 transitions, 3423 flow. Second operand 9 states and 365 transitions. [2024-11-09 10:49:22,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 254 transitions, 4098 flow [2024-11-09 10:49:22,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 254 transitions, 3973 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-09 10:49:22,642 INFO L231 Difference]: Finished difference. Result has 207 places, 202 transitions, 3189 flow [2024-11-09 10:49:22,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3189, PETRI_PLACES=207, PETRI_TRANSITIONS=202} [2024-11-09 10:49:22,642 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 145 predicate places. [2024-11-09 10:49:22,643 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 202 transitions, 3189 flow [2024-11-09 10:49:22,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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 10:49:22,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:22,643 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:22,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:22,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:22,844 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:22,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash -970505722, now seen corresponding path program 6 times [2024-11-09 10:49:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:22,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626791099] [2024-11-09 10:49:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:22,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:23,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:23,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626791099] [2024-11-09 10:49:23,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626791099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:23,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723508742] [2024-11-09 10:49:23,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:49:23,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:23,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:23,039 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:23,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 10:49:23,109 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-09 10:49:23,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:23,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:49:23,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:23,289 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:23,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723508742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:23,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:23,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-09 10:49:23,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707201112] [2024-11-09 10:49:23,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:23,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:49:23,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:23,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:49:23,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:49:23,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-09 10:49:23,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 202 transitions, 3189 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:49:23,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:23,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-09 10:49:23,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:23,955 INFO L124 PetriNetUnfolderBase]: 3058/5792 cut-off events. [2024-11-09 10:49:23,955 INFO L125 PetriNetUnfolderBase]: For 68399/68924 co-relation queries the response was YES. [2024-11-09 10:49:23,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29848 conditions, 5792 events. 3058/5792 cut-off events. For 68399/68924 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 41419 event pairs, 902 based on Foata normal form. 58/5709 useless extension candidates. Maximal degree in co-relation 29688. Up to 3507 conditions per place. [2024-11-09 10:49:23,994 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 127 selfloop transitions, 55 changer transitions 28/236 dead transitions. [2024-11-09 10:49:23,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 236 transitions, 3830 flow [2024-11-09 10:49:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:49:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:49:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2024-11-09 10:49:23,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6077441077441077 [2024-11-09 10:49:23,995 INFO L175 Difference]: Start difference. First operand has 207 places, 202 transitions, 3189 flow. Second operand 9 states and 361 transitions. [2024-11-09 10:49:23,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 236 transitions, 3830 flow [2024-11-09 10:49:24,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 236 transitions, 3456 flow, removed 41 selfloop flow, removed 17 redundant places. [2024-11-09 10:49:24,093 INFO L231 Difference]: Finished difference. Result has 183 places, 190 transitions, 2774 flow [2024-11-09 10:49:24,094 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2774, PETRI_PLACES=183, PETRI_TRANSITIONS=190} [2024-11-09 10:49:24,094 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 121 predicate places. [2024-11-09 10:49:24,094 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 190 transitions, 2774 flow [2024-11-09 10:49:24,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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 10:49:24,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:24,095 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:24,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 10:49:24,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 10:49:24,295 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:24,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1006245536, now seen corresponding path program 3 times [2024-11-09 10:49:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:24,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622479644] [2024-11-09 10:49:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:24,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:24,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:24,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622479644] [2024-11-09 10:49:24,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622479644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:24,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117562881] [2024-11-09 10:49:24,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:49:24,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:24,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:24,409 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:24,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 10:49:24,489 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:49:24,489 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:24,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:49:24,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:24,495 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 10:49:24,534 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:49:24,534 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 18 treesize of output 17 [2024-11-09 10:49:24,542 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:49:24,543 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 10:49:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:49:24,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:24,778 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 42 treesize of output 38 [2024-11-09 10:49:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:49:24,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117562881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:49:24,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:49:24,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2024-11-09 10:49:24,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376490882] [2024-11-09 10:49:24,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:49:24,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:49:24,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:49:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:49:25,760 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:49:25,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 190 transitions, 2774 flow. Second operand has 22 states, 22 states have (on average 26.545454545454547) internal successors, (584), 22 states have internal predecessors, (584), 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 10:49:25,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:25,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:49:25,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:27,644 INFO L124 PetriNetUnfolderBase]: 6790/12213 cut-off events. [2024-11-09 10:49:27,644 INFO L125 PetriNetUnfolderBase]: For 112532/112552 co-relation queries the response was YES. [2024-11-09 10:49:27,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59755 conditions, 12213 events. 6790/12213 cut-off events. For 112532/112552 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 88664 event pairs, 2308 based on Foata normal form. 80/12265 useless extension candidates. Maximal degree in co-relation 59640. Up to 2993 conditions per place. [2024-11-09 10:49:27,725 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 429 selfloop transitions, 100 changer transitions 0/542 dead transitions. [2024-11-09 10:49:27,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 542 transitions, 8407 flow [2024-11-09 10:49:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 10:49:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-09 10:49:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 673 transitions. [2024-11-09 10:49:27,727 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5098484848484849 [2024-11-09 10:49:27,727 INFO L175 Difference]: Start difference. First operand has 183 places, 190 transitions, 2774 flow. Second operand 20 states and 673 transitions. [2024-11-09 10:49:27,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 542 transitions, 8407 flow [2024-11-09 10:49:27,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 542 transitions, 7863 flow, removed 77 selfloop flow, removed 9 redundant places. [2024-11-09 10:49:27,921 INFO L231 Difference]: Finished difference. Result has 181 places, 227 transitions, 3452 flow [2024-11-09 10:49:27,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3452, PETRI_PLACES=181, PETRI_TRANSITIONS=227} [2024-11-09 10:49:27,921 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 119 predicate places. [2024-11-09 10:49:27,922 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 227 transitions, 3452 flow [2024-11-09 10:49:27,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 26.545454545454547) internal successors, (584), 22 states have internal predecessors, (584), 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 10:49:27,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:27,922 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:27,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 10:49:28,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 10:49:28,123 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:49:28,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:28,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1381627071, now seen corresponding path program 1 times [2024-11-09 10:49:28,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:28,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046737439] [2024-11-09 10:49:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:28,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:28,233 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 10:49:28,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:28,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046737439] [2024-11-09 10:49:28,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046737439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:28,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379216238] [2024-11-09 10:49:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:28,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:28,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:28,235 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:28,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 10:49:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:28,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:49:28,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:28,373 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 10:49:28,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379216238] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:28,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-09 10:49:28,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829783672] [2024-11-09 10:49:28,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:28,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:49:28,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:49:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:49:28,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-09 10:49:28,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 227 transitions, 3452 flow. Second operand has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 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 10:49:28,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:28,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-09 10:49:28,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:29,496 INFO L124 PetriNetUnfolderBase]: 4865/9807 cut-off events. [2024-11-09 10:49:29,496 INFO L125 PetriNetUnfolderBase]: For 91225/91827 co-relation queries the response was YES. [2024-11-09 10:49:29,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45580 conditions, 9807 events. 4865/9807 cut-off events. For 91225/91827 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 78958 event pairs, 1794 based on Foata normal form. 276/10020 useless extension candidates. Maximal degree in co-relation 41697. Up to 4456 conditions per place. [2024-11-09 10:49:29,561 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 232 selfloop transitions, 30 changer transitions 0/287 dead transitions. [2024-11-09 10:49:29,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 287 transitions, 5014 flow [2024-11-09 10:49:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:49:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:49:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-11-09 10:49:29,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5692640692640693 [2024-11-09 10:49:29,562 INFO L175 Difference]: Start difference. First operand has 181 places, 227 transitions, 3452 flow. Second operand 7 states and 263 transitions. [2024-11-09 10:49:29,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 287 transitions, 5014 flow